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Knowledge base Updated: February 5, 2026

What is Ransomware and How to Protect Yourself - Guide

Ransomware is malicious software that blocks access to data. Learn how to effectively protect yourself against it.

Marcin Godula Marcin Godula

Ransomware is malicious software that encrypts data on a device and then demands a ransom for decryption. To protect against it, regular backups, strong antivirus protection, avoiding suspicious links, and keeping software updated are essential. Employee training on cyber threats is also important to minimize infection risk.

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What is ransomware and how does it work?

Ransomware is malicious software that encrypts victim’s data and demands a ransom for unlocking it. It works by infiltrating systems, typically exploiting security vulnerabilities or user negligence. After infecting a device, ransomware scans drives looking for valuable files and then encrypts them using advanced cryptographic algorithms.

The encryption process is lightning-fast - within minutes, ransomware can encrypt thousands of files. After completing encryption, the software displays a ransom demand message, often requesting cryptocurrency payment. Ransom amounts can range from hundreds to millions of dollars, depending on the target.

Ransomware often uses techniques that prevent simple data recovery. Some variants delete Windows system backup copies or modify registries, making system restoration difficult. More advanced forms of ransomware can spread across networks, infecting other connected devices.

What are the most common types of ransomware?

Ransomware comes in many variants, but the most common include:

Crypto ransomware encrypts victim’s files, preventing access to them. This is the most widespread type, posing a serious threat to companies and institutions. An example is WannaCry, which in 2017 infected over 230,000 computers in 150 countries.

Locker ransomware blocks access to the entire operating system, preventing device use. It often displays false messages about legal violations, demanding a “fine.”

Scareware is software pretending to be legitimate antivirus tools. It informs users about alleged infections and forces purchase of the “full version” to remove them.

Doxware, also known as leakware, threatens to disclose victim’s sensitive data if the ransom is not paid. This type is particularly dangerous for companies holding confidential customer information.

RaaS (Ransomware-as-a-Service) is a business model where ransomware creators make their tools available to other criminals for a fee or profit share. An example is Cerber, which at its peak generated approximately $200,000 in monthly revenue for its operators.

Why is ransomware such a serious threat?

Ransomware represents a critical cybersecurity threat for several key reasons. First, its effects can be catastrophic for victims. Loss of access to critical data can paralyze company operations for days or weeks, leading to enormous financial losses. According to a Cybersecurity Ventures report, global costs related to ransomware reached $20 billion in 2021.

Ransomware evolves at an alarming pace. Cybercriminals constantly improve their techniques, creating increasingly sophisticated malware variants. An example is Ryuk ransomware, which in 2019 attacked over 500 organizations in the USA, causing estimated losses of $61 million.

Another reason for the threat’s severity is the ease of conducting attacks. The Ransomware-as-a-Service (RaaS) model enables even inexperienced criminals to conduct advanced attacks. It’s estimated that 64% of ransomware attacks in 2020 were conducted using the RaaS model.

Ransomware often attacks critical infrastructure such as hospitals and energy systems. In 2020, 560 healthcare facilities in the USA fell victim to ransomware, directly threatening patients’ lives.

Finally, ransomware’s effectiveness stems from its psychological impact on victims. Time pressure and the threat of losing valuable data often compels victims to pay the ransom, despite expert recommendations. According to research, 32% of companies attacked by ransomware decide to pay the ransom.

What are the most common ransomware infection routes?

Ransomware uses various infection methods, but the most common attack routes include:

Phishing is the main vector for ransomware infection. Cybercriminals send fake emails that appear to be legitimate messages from trusted sources. They contain malicious attachments or links that, when clicked, infect the system. According to a Verizon report, 94% of malware is delivered via email.

Exploits are another popular method. Attackers exploit vulnerabilities in operating systems or applications. An example is the EternalBlue exploit, used in the WannaCry attack, infecting over 200,000 computers in 150 countries within just a few days.

Drive-by downloads is a technique where malicious software is automatically downloaded when a user visits an infected website. This requires no interaction from the victim. It’s estimated that a new infected website appears every 13 seconds.

Remote desktops (RDP) are frequently attacked by cybercriminals. They use weak passwords or security vulnerabilities to gain system access. In 2020, RDP attacks increased by 768% compared to the previous year.

Malvertising is a method where criminals place infected advertisements on legitimate websites. Clicking such an ad leads to infection. In 2019, over 50,000 malicious advertising campaigns were detected.

Infected USB drives are still an effective method of spreading ransomware. Cybercriminals often leave infected flash drives in public places, counting on potential victims’ curiosity. Research shows that 48% of found USB drives are plugged into computers.

Who is the main target of ransomware attacks?

Ransomware attacks affect a wide spectrum of targets, but some sectors are particularly vulnerable:

The healthcare sector is a primary target due to the criticality of patient data and time pressure in life-threatening situations. In 2020, 560 medical facilities in the USA fell victim to ransomware, representing a 60% increase compared to the previous year.

Educational institutions, especially universities, are frequently attacked due to valuable research data and student personal information. In 2019, 89% of UK universities experienced ransomware attack attempts.

The financial sector is an attractive target due to potential profits. In 2020, 55% of financial institutions reported ransomware attacks, with an average attack cost of $1.85 million.

Small and medium enterprises (SMEs) are often targeted due to limited cybersecurity resources. Statistics show that 71% of ransomware attacks target companies with fewer than 100 employees.

Government and local institutions are attractive targets due to sensitive data and often outdated IT systems. In 2019, 966 government institutions in the USA fell victim to ransomware, costing over $7.5 billion.

Large corporations are targets for high-value attacks. An example is the attack on Garmin in 2020, which caused a five-day service outage and cost the company $10 million.

Critical infrastructure, such as power grids and water systems, is increasingly being attacked. In 2021, the attack on Colonial Pipeline caused serious fuel supply disruptions on the US East Coast.

Which devices and systems are most vulnerable to ransomware?

Ransomware can attack virtually any device connected to the network, but some are particularly vulnerable:

Windows computers are the main target of ransomware attacks. According to statistics, 85% of all ransomware attacks target Windows systems. This is due to their prevalence in business environments and numerous security vulnerabilities.

Servers, especially those running Windows Server, are attractive targets due to the amount of stored data. In 2020, 57% of ransomware attacks targeted servers.

Mobile devices, particularly those with Android, are becoming increasingly frequent attack targets. In 2020, the number of ransomware attacks on mobile devices increased by 50% compared to the previous year.

IoT systems (Internet of Things) are increasingly being attacked due to weak security. It’s estimated that by 2025, there will be 75 billion IoT devices, creating an enormous attack surface.

Industrial systems (ICS/SCADA) are vulnerable to ransomware attacks that can have catastrophic consequences. In 2019, 56% of industrial organizations reported ransomware attacks on their control systems.

Public clouds are becoming increasingly frequent attack targets. In 2020, 70% of organizations using public cloud experienced ransomware-related incidents.

Backup systems are often attacked to prevent victims from recovering data without paying the ransom. 75% of ransomware attacks include attempts to damage or encrypt backups.

How to recognize a ransomware attack?

Recognizing a ransomware attack is crucial for quick response and minimizing damage. Here are the main signs:

Inability to access files is the most obvious symptom. Users suddenly discover they cannot open documents, and file names are often changed to strange character strings. In 95% of cases, this is the first sign of an attack.

A ransom demand usually appears as a message on the screen. This can be a pop-up window or a changed desktop with payment instructions. 89% of ransomware attacks include such a demand.

Unusual network activity may indicate an ongoing attack. Increased network traffic, especially to unknown IP addresses, is often associated with ransomware activity. Network monitoring systems can detect such activity in 78% of cases.

System slowdown is often observed during file encryption by ransomware. Users may notice significant delays in application and operating system performance. This phenomenon occurs in 65% of attacks.

Unexpected program or process launches may signal ransomware presence. Tools like Windows Task Manager may show suspicious processes consuming a lot of system resources. 72% of attacks can be detected this way.

Changes in file structure, such as mass extension changes or creation of new files with strange names, are characteristic of ransomware activity. File integrity monitoring systems can detect such changes in 83% of cases.

Unusual error messages, especially regarding inability to open files or lack of disk access, may indicate a ransomware attack. 61% of users report such messages during an attack.

What are the consequences of a ransomware attack?

The consequences of a ransomware attack can be catastrophic for organizations and include several serious outcomes:

Data loss is the most serious and direct consequence. According to research, 32% of companies lose critical data as a result of a ransomware attack. In some cases, even after paying the ransom, full data recovery is not possible.

Business downtime is a common aftermath of an attack. Average downtime is 21 days, which can lead to enormous financial losses. For small and medium enterprises, downtime costs can reach up to $8,500 per hour.

Financial costs associated with a ransomware attack are significant. These include not only potential ransom but also costs of data recovery, system repair, and security strengthening. The average cost of a ransomware attack in 2021 was $1.85 million.

Loss of reputation and customer trust is a frequent consequence of ransomware attacks. Companies that fell victim to an attack may be perceived as untrustworthy in terms of data protection. According to research, 59% of consumers avoid companies that have experienced data breaches.

Legal consequences, such as lawsuits and regulatory penalties, are becoming increasingly common. Companies that fail to provide adequate data protection may be subject to severe financial penalties. For example, under GDPR, penalties can reach up to EUR 20 million or 4% of annual global turnover.

Loss of competitive advantage is often a result of a ransomware attack. Companies experiencing downtime and data loss may lose customers to competitors. Research shows that 29% of customers completely abandon services from companies after a ransomware attack.

Impact on employee morale and productivity can be significant. Stress related to the attack and its aftermath can lead to burnout and increased employee turnover. According to research, 42% of employees consider leaving their jobs after a ransomware attack.

Is paying the ransom an effective method for recovering data?

Paying the ransom may seem like a quick solution, but experts strongly advise against this method for several key reasons:

Lack of guarantee of data recovery is the main argument against paying the ransom. According to research, only 8% of victims who paid the ransom recovered all their data. In many cases, criminals simply disappear after receiving payment.

Encouraging criminals to continue attacks is a serious problem. By paying the ransom, victims fund cybercriminal activities and motivate them to conduct more attacks. Research shows that 80% of companies that paid the ransom experienced another ransomware attack.

Risk of further security breaches is high. Even if criminals provide a decryption key, there’s no guarantee they’ve removed all malware from the system. As a result, 63% of companies that paid the ransom experienced subsequent security breaches.

Legal and ethical issues related to financing criminal activity are significant. In some jurisdictions, paying ransom may be illegal. Additionally, ransoms often fund other forms of crime, such as terrorism or drug trafficking.

High ransom costs can be paralyzing for companies. The average ransom amount in 2021 was $170,000, and in some cases reached millions of dollars. For many organizations, especially SMEs, such costs are unbearable.

Loss of reputation associated with paying ransom can be severe. Companies that pay ransoms may be perceived as weak and vulnerable to attacks, which may discourage customers and business partners.

Availability of alternative data recovery methods, such as restoring from backups, makes paying ransom often unnecessary. According to research, 96% of companies that regularly test their backups are able to recover data without paying ransom.

What actions to take during a ransomware infection?

When a ransomware attack is detected, quick and decisive response is crucial to minimizing damage. Here are the key steps to take:

Isolating infected systems from the network is the highest priority. Ransomware often spreads through the network, so disconnecting infected devices can prevent further infection. 97% of cybersecurity experts recommend immediate isolation as the first step.

Notifying appropriate authorities, such as police or CERT (Computer Emergency Response Team), is important for tracking and combating cybercrime. In some jurisdictions, reporting an attack is legally required. 72% of companies report ransomware attacks to appropriate authorities.

Activating the incident response plan, if one exists, allows for a coordinated and effective response. The plan should define the roles and responsibilities of the security team, communication procedures, and remediation steps. 62% of organizations have a ransomware incident response plan.

Assessing the scope of infection through analysis of system logs and network activity helps determine the scale of the problem. Malware analysis tools can identify the specific ransomware variant. 81% of companies conduct thorough analysis after an attack.

Notifying employees and customers about the attack is important for maintaining transparency and trust. Communication should be clear, honest, and include information about remediation actions taken. 68% of companies inform their customers about ransomware attacks.

Restoring data from backups is the most effective method of recovery after an attack. However, it’s important to ensure that backups are not infected. 96% of organizations that regularly test their backups are able to recover data after a ransomware attack.

Strengthening security after an attack is crucial for preventing future incidents. This may include patching security vulnerabilities, updating antivirus software, and training employees in cybersecurity. 91% of companies increase their cybersecurity investments after a ransomware attack.

How to prevent ransomware attacks?

Preventing ransomware attacks requires a comprehensive approach to cybersecurity. Here are key strategies:

Regular system and application updates are critical because many ransomware attacks exploit known security vulnerabilities. According to research, 60% of ransomware attacks could have been prevented by installing available patches.

Strong authentication, including high-entropy passwords and multi-factor authentication (MFA), makes it difficult for cybercriminals to gain unauthorized access. Research shows that MFA can prevent 99.9% of account attacks.

Employee cybersecurity training, especially in recognizing phishing and safe email use, is crucial. Human error is the cause of 95% of successful cyberattacks.

Network segmentation and role-based access control (RBAC) limit potential damage in case of a breach. If one network segment becomes infected, segmentation prevents spreading to other areas. RBAC ensures that users have access only to resources necessary for their work.

Implementing advanced security solutions, such as intrusion detection and prevention systems (IDS/IPS), sandboxing, and user and entity behavior analytics (UEBA), enables early threat detection and response. Organizations implementing these technologies experience 50% fewer successful ransomware attacks.

Regular testing and improvement of incident response plans ensures the organization is prepared for an attack. Attack simulations, such as penetration tests and “red team” exercises, help identify security weaknesses.

Using threat intelligence services provides current information about new threats and trends in cybercrime. 85% of organizations using Threat Intelligence are able to prevent ransomware attacks.

What security practices can prevent ransomware infection?

Beyond organizational-level strategies, there are several security practices that every user can implement to prevent ransomware infection:

Caution when opening email attachments and clicking links, especially from unknown senders, is crucial. Phishing remains the main vector for ransomware infection, accounting for 54% of attacks.

Using strong, unique passwords for each account and regularly changing them makes it difficult for cybercriminals to gain unauthorized access. Research shows that 61% of people use the same password for multiple accounts, increasing risk.

Enabling two-factor authentication (2FA) wherever possible adds an additional layer of security. 2FA can prevent 99.9% of account attacks, even if the password is compromised.

Regular device scanning using updated antivirus software helps detect and remove malware. However, only 36% of users regularly scan their devices.

Limiting user permissions to the minimum necessary for their tasks (principle of least privilege) limits potential damage in case of infection. According to research, 94% of employees have unnecessary access to confidential data.

Avoiding connecting untrusted USB devices, such as found flash drives, can prevent infection. Research shows that 48% of people would plug a found flash drive into their computer.

Disabling macros in office applications, such as Microsoft Office, can prevent execution of malicious code. Macros are used in 40% of ransomware attacks.

Why are system and software updates important in fighting ransomware?

Regular operating system and application updates are one of the most effective ways to prevent ransomware attacks. Here’s why:

Patching security vulnerabilities is the main purpose of updates. Cybercriminals constantly search for and exploit vulnerabilities in systems and applications. Software vendors respond by releasing security patches. According to research, 60% of ransomware attacks exploit known vulnerabilities that have available patches.

Updates often contain security improvements, such as stronger encryption, better authentication mechanisms, and additional malware protection features. For example, Windows 10 introduced Controlled Folder Access, which protects against unauthorized file changes.

Updates ensure compliance with the latest cybersecurity standards and regulations. Many industries, such as healthcare (HIPAA) and finance (PCI DSS), require regular updates as part of compliance requirements.

Outdated systems and applications are the main target of attacks. Cybercriminals actively scan the Internet for outdated software, knowing it’s vulnerable to attacks. Research shows that 80% of successful intrusions exploit outdated software.

Updates often contain performance and stability improvements, making systems more resistant to denial-of-service (DoS) attacks, which are often used in conjunction with ransomware.

Regular updates are required by many cyber threat insurance policies. Companies that fail to comply with update requirements may have difficulty obtaining compensation in case of an attack.

Automatic updates, offered by many software vendors, make it easier to keep systems current. However, only 30% of organizations have automatic updates enabled.

What are the best backup practices in the context of ransomware?

Regular data backup is crucial for recovery after a ransomware attack. Here are best practices:

Following the 3-2-1 rule: 3 copies of data, on 2 different media, with 1 copy off-site. This strategy provides redundancy and protection against various failure scenarios. 78% of organizations following the 3-2-1 rule are able to recover data after a ransomware attack.

Frequent and regular backups minimize potential data loss. Frequency should depend on the rate of data changes and required recovery point objective (RPO). 60% of companies create daily backups.

Backup integrity verification through regular restore tests ensures data can be recovered when needed. Research shows that 34% of backups contain errors preventing full data recovery.

Storing backups in a separate network location or offline protects against ransomware attacks that can encrypt connected backups. 90% of ransomware attacks also encrypt backups if they are available online.

Encrypting backups protects data confidentiality in case of theft or unauthorized access. However, only 41% of organizations encrypt their backups.

Using immutable backups that cannot be changed or deleted prevents manipulation by ransomware. Technologies such as WORM (Write Once, Read Many) ensure backup immutability.

Regular reviews and updates of backup strategy ensure it keeps pace with the changing IT environment and new threats. 58% of organizations update their backup strategy less than once a year.

How to properly create and store backups?

Proper creation and storage of backups is crucial for effective recovery after a ransomware attack. Here are the key steps:

Defining RPO (Recovery Point Objective) and RTO (Recovery Time Objective) for each system and application. RPO determines the maximum acceptable data loss, and RTO the maximum downtime. These parameters determine the frequency and type of backups.

Choosing the appropriate backup type: full (all data), incremental (changes since the last incremental backup), or differential (changes since the last full backup). Full backups provide the fastest recovery but take the most space. Incremental and differential backups save space but require more recovery time.

Using a combination of media for backup storage, including disks, tapes, and cloud. Media diversity increases resistance to failures and attacks.

Encrypting backups using strong algorithms such as AES-256 and secure encryption key management. Keys should be stored separately from encrypted data.

Verifying backup integrity after each backup task. Most backup solutions offer automatic verification.

Regular testing of data restore from backups, at least quarterly. Tests should cover various scenarios, such as restoring individual files, entire systems, and disaster recovery.

Storing at least one backup offline, disconnected from the network. Offline backups are resistant to ransomware attacks spreading through the network.

What software protects against ransomware?

Comprehensive ransomware protection requires a combination of different types of security software. Here are the key components:

Antivirus software with ransomware detection and blocking capabilities. Modern antivirus solutions use machine learning and behavioral analysis to identify new ransomware variants. Research shows that antivirus software can detect 97% of known ransomware families.

Firewalls controlling network traffic and blocking suspicious activities. Advanced next-generation firewalls (NGFW) offer features such as SSL inspection, application filtering, and intrusion prevention (IPS).

Intrusion detection and prevention systems (IDS/IPS) monitoring the network for anomalies and attacks. IDS/IPS can identify exploit attempts, port scanning, and communication with command-and-control (C2) servers used by ransomware.

Email filtering and anti-spam solutions that block malicious attachments and links. Phishing remains the main vector for ransomware infection, and email filtering can block up to 99.9% of phishing attacks.

Application whitelisting software that allows only approved programs to run. Whitelisting can prevent execution of unknown ransomware files. Research shows that whitelisting can prevent 100% of ransomware attacks if properly configured.

File integrity monitoring (FIM) tools that detect unauthorized changes to critical system and configuration files. FIM can identify file encryption by ransomware at an early stage of the attack.

Backup and data recovery solutions with deduplication, compression, and encryption features. Modern backup solutions also offer ransomware protection features such as immutable backups and backup isolation.

How to secure a corporate network against ransomware?

Securing a corporate network against ransomware requires a multi-layered approach encompassing technology, processes, and people. Here are the key elements:

Network segmentation into separate security zones (e.g., DMZ, internal network, guest network) with traffic control between zones. Segmentation limits ransomware spread in case of infection. Research shows that network segmentation can reduce the impact of ransomware attacks by 70%.

Implementing strong authentication mechanisms, including high-entropy passwords, multi-factor authentication (MFA), and identity management. MFA can prevent 99.9% of account attacks, even if the password is compromised.

Regular updates and patching of operating systems, applications, and network devices. Outdated software is the main target of ransomware attacks. 60% of ransomware attacks exploit vulnerabilities for which patches are available.

Limiting user permissions to the minimum necessary for their tasks (principle of least privilege). Limiting administrative privileges reduces potential damage in case of infection. 94% of employees have unnecessary access to confidential data.

Implementing network monitoring and threat detection solutions, such as intrusion detection systems (IDS), intrusion prevention systems (IPS), and user and entity behavior analytics (UEBA). These tools can identify suspicious activities associated with ransomware.

Regular creation and testing of backups of critical data and systems. Backups should be stored offline and regularly tested for integrity and restoration capability. 96% of organizations that regularly test their backups are able to recover data after a ransomware attack.

Employee cybersecurity training, especially in recognizing phishing and safe use of email and Internet. Human error is the cause of 95% of successful cyberattacks.

How can employee education reduce ransomware attack risk?

Employee education is a crucial element of defense against ransomware because human error is often exploited by cybercriminals. Here’s how training can reduce risk:

Raising awareness about phishing threats, the main vector for ransomware infection. Employees should learn to recognize suspicious emails, attachments, and links. Regular anti-phishing training can reduce click rates in simulated phishing attacks by 75%.

Promoting good password practices, including using strong, unique passwords for each account and regularly changing them. Employees should also understand the importance of multi-factor authentication (MFA). MFA can prevent 99.9% of account attacks.

Teaching employees safe mobile device use, including securing them with passwords, encrypting data, and avoiding connecting to untrusted Wi-Fi networks. 60% of employees connect their work devices to unsecured public networks.

Encouraging reporting of suspicious activities, such as unexpected email attachments or slow system performance, to the IT department. Early detection of ransomware infection is crucial for minimizing damage. Organizations with a strong incident reporting culture experience 50% fewer successful attacks.

Conducting regular phishing attack simulations to test employee vigilance and identify areas requiring improvement. Simulations should be realistic and tailored to employees’ specific roles and responsibilities.

Providing employees with clear guidelines on using unapproved applications and cloud services (shadow IT). Unapproved applications can introduce security vulnerabilities. 80% of employees admit to using shadow IT applications.

Regular assessment and updating of cybersecurity training programs to account for new threats and trends. Training should be interactive, engaging, and tailored to employees’ skill levels.

How to prepare an incident response plan for ransomware?

A ransomware incident response plan is a crucial element of cybersecurity strategy. Here are the key steps in preparing such a plan:

Identifying critical systems, data, and business processes that must be prioritized for protection and restoration in case of an attack. Prioritization should be based on business impact and regulatory requirements.

Defining roles and responsibilities of the incident response team, including leaders, security analysts, IT specialists, and spokespersons. Each team member should know their tasks and have the necessary skills.

Establishing clear procedures for detecting, analyzing, containing, removing, and recovering from ransomware attacks. Procedures should include steps such as isolating infected systems, analyzing malware, and restoring from backups.

Identifying internal and external resources that may be needed during an incident, such as backup systems, external security experts, and legal support. These resources should be pre-approved and easily accessible.

Developing a communication strategy in case of an attack, including message templates for employees, customers, business partners, and media. Communication should be transparent, timely, and compliant with legal requirements.

Regularly testing and updating the incident response plan through simulations, exercises, and post-incident reviews. Tests should cover various attack scenarios and involve the entire incident response team.

Integrating the ransomware incident response plan with the overall business continuity plan (BCP) and disaster recovery plan (DRP). Ransomware attacks often lead to operational disruptions that require BCP and DRP activation.

What are the methods for recovering data after a ransomware attack?

Recovering data after a ransomware attack can be difficult, but there are several methods that can help:

Restoring from backups is the most effective method of data recovery. Regular, verified backups stored offline and separate from the production network can enable full data recovery without paying the ransom. 96% of organizations that regularly test their backups are able to recover data after a ransomware attack.

Decrypting files using ransomware recovery tools may be possible in some cases. Some ransomware variants have flaws in encryption implementation that enable decryption without the key. Projects like No More Ransom provide free decryption tools for some ransomware families.

Recovering files from Windows shadow copies (Volume Shadow Copies) may be possible if the ransomware didn’t delete them. Shadow copies are automatic file snapshots created by Windows. Tools like ShadowExplorer can help recover files from shadow copies.

Recovering data from undamaged parts of the hard drive using data recovery tools like PhotoRec or Recuva. These tools scan the disk looking for undamaged file fragments and attempt to recover them. However, recovered files may be incomplete or corrupted.

Negotiating with attackers and paying the ransom should be a last resort and is generally discouraged by security experts. Paying the ransom doesn’t guarantee data recovery and may encourage criminals to continue attacks. However, in some critical situations when other methods fail, organizations may consider paying the ransom.

Rebuilding systems and data from scratch using documentation, source code, and other resources. This method is time-consuming and expensive but may be necessary if backups are unavailable and critical data cannot be recovered by other methods.

Cooperating with law enforcement and security experts who may have access to additional data recovery tools and resources. Some law enforcement agencies, such as Europol, have dedicated teams to fight ransomware and can help victims recover data.

What are the latest technologies for ransomware protection?

Ransomware protection is constantly evolving with new technologies emerging. Here are some of the latest solutions:

Machine learning (ML) and artificial intelligence (AI) are used to detect and block ransomware through behavioral pattern and anomaly analysis. ML algorithms can identify new ransomware variants that bypass traditional signatures. Research shows that ML-based solutions can detect up to 95% of unknown ransomware families.

Endpoint behavioral analysis (Endpoint Detection and Response, EDR) monitors activity on endpoints to identify suspicious behaviors such as mass file encryption. EDR can automatically isolate infected devices and stop ransomware spread. According to research, organizations using EDR experience 60% fewer successful ransomware attacks.

Process isolation and microsegmentation limit ransomware’s ability to spread by running applications in isolated containers or virtual machines. If one container is infected, others remain secure. Microsegmentation divides the network into small, isolated segments, limiting ransomware’s lateral movement.

Immutable backups use technologies such as WORM (Write Once, Read Many) to create backups that cannot be changed or deleted for a specified period. Immutable backups are resistant to encryption or deletion by ransomware. Research shows that organizations with immutable backups recover data after a ransomware attack on average 50% faster.

Serverless security functions running in the cloud can automatically scale to analyze large amounts of data and quickly detect threats. Serverless sandboxing can execute suspicious files in an isolated cloud environment to identify malicious behavior without affecting the local network.

Blockchain can be used to verify backup integrity and prevent manipulation. Cryptographic hashes of backups are stored in an immutable blockchain ledger, enabling detection of unauthorized changes. Startups like Chainpoint use blockchain to secure backups against ransomware.

Human-augmented AI combines automatic threat detection with security expert knowledge. AI systems identify potential ransomware attacks, and security analysts verify and investigate these incidents. This approach combines AI’s speed with human context and creativity.

The ransomware threat landscape is constantly changing, and attackers are adopting new tactics. Here are some of the latest trends:

Ransomware-as-a-Service (RaaS) is a model where ransomware creators make their tools available to other criminals for a fee or profit share. The RaaS model lowers entry barriers for cybercriminals and accelerates development of new ransomware variants. It’s estimated that 60% of ransomware attacks in 2020 were conducted using the RaaS model.

“Double extortion” attacks, where criminals not only encrypt data but also threaten to disclose it if the ransom is not paid. This tactic puts additional pressure on victims because leaking sensitive data can lead to regulatory penalties and reputation loss. In 2020, 50% of ransomware attacks included double extortion.

Ransomware attacking backups and data recovery systems, preventing victims from restoring systems without paying the ransom. Some ransomware variants, like Ryuk, can delete Windows shadow copies and encrypt connected backup devices. 75% of ransomware attacks include attempts to damage or encrypt backups.

Supply chain attacks, where ransomware infects an organization by attacking its suppliers or business partners. These attacks exploit trusted connections between organizations to spread. The SolarWinds attack in 2020, although not related to ransomware, demonstrated the potential scale of supply chain attacks.

Ransomware attacking industrial systems (ICS) and critical infrastructure, potentially causing disruptions in the physical world. Attacks on healthcare systems, power grids, and manufacturing facilities can threaten public safety and cause significant economic losses. In 2020, ransomware attacks on industrial organizations increased by 150%.

Use of artificial intelligence (AI) and machine learning (ML) by attackers to create more sophisticated and adaptive forms of ransomware. AI-assisted ransomware can automatically adjust its encryption techniques and avoid detection. Although this is currently mainly a theoretical threat, researchers have already demonstrated proof-of-concept ransomware using AI.

Attacks on Internet of Things (IoT) devices, which often have weak security and can serve as entry points to corporate networks. Ransomware can encrypt data generated by IoT devices or use them to spread across the network. It’s estimated that by 2025, there will be 75 billion IoT devices, creating an enormous attack surface.

What are the most famous examples of ransomware attacks?

Over the years, there have been many significant ransomware attacks that have affected organizations worldwide. Here are some of the most famous examples:

WannaCry (2017) - an attack that affected over 200,000 computers in 150 countries, causing estimated losses of $4 billion. WannaCry used the EternalBlue exploit, developed by the NSA, to spread across networks. The attack significantly impacted the UK’s NHS, forcing hospitals to cancel procedures and redirect ambulances.

NotPetya (2017) - an attack that began in Ukraine but quickly spread worldwide, causing estimated losses of $10 billion. NotPetya pretended to be ransomware but was actually designed to destroy data without possibility of recovery. The attack significantly affected large corporations such as Maersk, Merck, and FedEx.

Ryuk (2018-present) - a highly profitable ransomware operation that has collected over $150 million in ransom. Ryuk primarily attacks large organizations, using automated and manual techniques to maximize damage. Ryuk victims include hospitals, government agencies, and large corporations.

Maze (2019-2020) - a ransomware group that popularized the “double extortion” tactic, stealing data before encrypting it and threatening to disclose it if the ransom is not paid. Maze attacked over 200 organizations, including Canon, LG, and Xerox, often demanding ransoms in the millions of dollars.

Colonial Pipeline (2021) - an attack that forced the largest fuel pipeline operator in the USA to shut down its entire network, causing fuel shortages and panic at gas stations on the East Coast. Colonial Pipeline paid $4.4 million in ransom, part of which was later recovered by the FBI.

Kaseya (2021) - an attack on an IT management software provider that affected over 1,000 companies worldwide. Criminals exploited a security vulnerability in Kaseya VSA software to distribute ransomware to managed IT service provider (MSP) customers. The attack was carried out by the REvil ransomware group, which demanded $70 million in ransom.

CNA Financial (2021) - an attack on one of the largest commercial insurers in the USA, forcing the company to shut down systems and affecting thousands of policies. CNA Financial paid $40 million in ransom, which is one of the largest known ransomware payments.

How is the ransomware threat landscape changing?

The ransomware threat landscape is constantly evolving, and attackers are adapting their tactics to new defensive technologies and changing targets. Here are some of the key changes:

Rise of targeted attacks on large organizations, as opposed to earlier mass attacks on individual users. Criminals increasingly choose high-value targets such as corporations, government institutions, and critical infrastructure that are more likely to pay high ransoms. In 2020, the average ransom amount increased by 171% to $312,000.

Transition from “spray and pray” to “big game hunting”, where criminals manually infiltrate networks and customize ransomware for a specific environment to maximize damage. These attacks often include data theft, backup deletion, and spreading across the entire network before activating encryption.

Increased use of “double extortion” and “triple extortion” tactics, where criminals not only encrypt data but also threaten to disclose it or launch DDoS attacks if the ransom is not paid. In 2020, 50% of ransomware attacks included double extortion, and 15% triple extortion.

Emergence of ransomware-as-a-service (RaaS), which lowers entry barriers for cybercriminals and accelerates development of new ransomware variants. The RaaS model enables even inexperienced criminals to conduct sophisticated attacks by providing them with tools, infrastructure, and support in exchange for a share of profits.

Rise of supply chain attacks, where criminals attack an organization through its suppliers or business partners. These attacks exploit trusted connections between organizations to spread ransomware on a large scale. The Kaseya attack in 2021 affected over 1,000 companies by infecting one software provider.

Increased use of cryptocurrencies, especially Bitcoin, for ransom payments, making it difficult to track and recover funds. Cryptocurrencies provide criminals with some degree of anonymity and transaction irreversibility. However, law enforcement is developing new tools to track cryptocurrency flows related to ransomware.

Evolution of ransomware toward more destructive forms, such as wiperware, which aims to permanently destroy data without possibility of recovery. Attacks like NotPetya show that some attackers are more interested in disrupting operations than financial gain.

Increased cooperation between ransomware groups, law enforcement, and the private sector to disrupt ransomware operations. Initiatives like the No More Ransom project provide victims with free decryption tools, while international law enforcement operations lead to shutdowns of ransomware infrastructure and arrests of key suspects.

Learn key terms related to this article in our cybersecurity glossary:

  • Ransomware — Ransomware is a type of malicious software (malware) that blocks access to a…
  • Backup — Backup, also known as a backup copy or safety copy, is the process of creating…
  • Network Security — Network security is a set of practices, technologies, and strategies aimed at…
  • Cybersecurity — Cybersecurity is a collection of techniques, processes, and practices used to…
  • Cybersecurity Incident Management — Cybersecurity incident management is the process of identifying, analyzing,…

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