The Internet we deal with every day - the one indexed by search engines such as Google - is just the tip of the iceberg. Beneath this publicly accessible surface lie vast areas invisible to ordinary users, known as the Deep Web and its darkest corner, the Dark Web. These terms, often confused and shrouded in notoriety, raise legitimate concerns, especially in the context of corporate security.
It is in the hidden parts of the network that the black market thrives, where stolen data, passwords and company-secret information are traded. Understanding what these areas are, how they work and what risks they pose is crucial today for anyone responsible for security in an organization. It’s not a matter of exploring these areas yourself, but of knowing how to protect your company from the threats that come from there. In this guide, we’ll dispel myths, explain the fundamental differences between the Deep Web and the Dark Web, and show you how an informed security strategy can help protect your company from what lurks in the shadows.
Shortcuts
- What is the Deep Web and why is it often confused with the Dark Web?
- What resources, inaccessible to standard search engines, are found on the Deep Web?
- What is the Dark Web and what are the dangers it poses to companies and users?
- Surface Web vs. Deep Web vs. Dark Web
- How does the Tor network, which allows anonymous access to hidden parts of the Internet, work?
- For what legitimate purposes do journalists, activists or law enforcement agencies use the Dark Web?
- What company data (passwords, databases) is traded on black market forums?
- What are the basic safety rules to follow when exploring these areas of the network?
- What are the risks of downloading any files from the Dark Web?
- How do we monitor the Dark Web for information about data leaks from our company?
- Is it safe to use the Tor network from a company computer?
- What are the best practices for protecting against Dark Web threats?
- How can nFlo’s Threat Intelligence services and consulting help your company monitor threats and protect itself from Deep and Dark Web risks?
What is the Deep Web and why is it often confused with the Dark Web?
Deep Web, or Deep Web, is the term for all Internet resources that are not indexed by standard search engines such as Google, Bing or DuckDuckGo. This means that they cannot be reached by simply typing a query into a search engine. The Deep Web makes up the overwhelming majority of the entire Internet - it is estimated to be more than 95% of all online resources.
Content found in the Deep Web is not put there to be hidden from the world. It is simply their nature or the way they are accessed that search engine robots cannot or should not index them. The Deep Web includes resources that we use every day. These include, for example:
-
Content behind a paywall: Scientific articles, industry reports or news portal content available only to subscribers.
-
Private user accounts: Your email inbox, online banking account, social media profile, data in company systems.
-
Databases: Huge, dynamically generated databases, such as government, medical or library databases.
-
Intranet networks: Internal corporate and academic networks.
Confusing the Deep Web with the Dark Web is one of the most common misunderstandings. The Dark Web is only a small, deliberately hidden and encrypted part of the Deep Web. Access to it requires specialized software, such as the Tor browser. While the Deep Web is predominantly legal and neutral, the Dark Web is largely associated with criminal activity and anonymity. It could be said that every site on the Dark Web is part of the Deep Web, but the vast majority of the Deep Web has nothing to do with the Dark Web.
📚 Read the complete guide: Ransomware: Ransomware - czym jest, jak się chronić, co robić po ataku
What resources, inaccessible to standard search engines, are found on the Deep Web?
The resources of the Deep Web (Deep Web) are a vast and extremely diverse collection of information, most of which is perfectly legal and useful in nature. Their lack of indexation by search engines is due to the need for privacy, security or simply their technical nature.
One of the largest categories of resources on the Deep Web is academic and scientific databases. Prestigious academic journals, university libraries, research archives and specialized databases (e.g., medical, chemical) make their collections available online, but access to them is usually password protected, requires a subscription or is restricted to the academic network. Google robots cannot access them, but for researchers and students they are an invaluable resource.
Another huge area is government and commercial resources with limited access. This includes internal government databases (e.g., e-PUAP systems, tax data), court archives or patient medical data in hospital systems. In the private sector, this includes all sorts of customer databases, CRM systems, electronic banking systems, corporate intranets and project management platforms. Access to these resources is tightly controlled and limited to authenticated users, which naturally excludes them from public indexing.
The Deep Web also includes content that is dynamically generated in response to a specific user query. When you book an airline ticket, the system searches for connections in real time in its database and generates a unique results page for you. This page does not exist as a static file, so a search engine cannot index it. The same is true for search results from internal search engines on major portals or online forums.
What is the Dark Web and what are the dangers it poses to companies and users?
The Dark Web (Dark Web) is a small, encrypted portion of the Deep Web that is intentionally and deliberately hidden from public access and standard browsers. It can only be accessed using specialized software that provides anonymity, such as the Tor network(The Onion Router). Sites in the Dark Web do not use standard domains (such as .com or .pl), but special pseudo-domains, usually with a .onion suffix.
The architecture of networks such as Tor means that both visitors to sites on the Dark Web and the owners of those sites can hide their true identities and locations. This high level of anonymity has unfortunately made the Dark Web a central location for a wide range of criminal activity. It is where black market trading platforms (so-called “darknet markets”) are located, where drugs, weapons, fake documents, and stolen data are traded.
From the company’s perspective, the dangers of the Dark Web are very real and serious. It is on the Darknet forums and marketplaces that cybercriminals trade data stolen during attacks: customer databases, credit card numbers, logins and passwords for websites, and even access to hacked corporate networks. That’s where ransomware gangs publish the data of companies that have refused to pay the ransom, and that’s where hacking services, such as launching a DDoS attack, can be hired. The mere appearance of company data in the Dark Web is a signal that a serious security incident has occurred.
Surface Web vs. Deep Web vs. Dark Web
| Feature | Surface Web (Surface Web) | Deep Web (Deep Web) | Dark Web (Dark Web) |
|---|---|---|---|
| Availability | Publicly available, indexed by search engines. | Not accessible to search engines, requires login or is dynamic. | Deliberately hidden, it requires special software (such as Tor). |
| Examples | News sites (e.g., onet.co.uk), public blogs, company websites. | Online banking, e-mail, databases, corporate intranets. | Hacking forums, markets with illegal goods, hidden services. |
| Legality | Usually legal | Usually legal | Often associated with illegal activities |
| Size (estimated) | ~ 5% of the total internet | ~ 95% of the entire internet | < 0.1% of the entire internet |
How does the Tor network, which allows anonymous access to hidden parts of the Internet, work?
The Tor (The Onion Router) network is the most important and popular technology for anonymous access to the Internet, including Dark Web resources. Its operation is based on the ingenious in its simplicity concept of onion routing, which provides multi-layer encryption and hides the true source and destination of communications.
When a user wants to connect to a site via the Tor network, his or her computer (or, more precisely, the Tor browser) first retrieves a list of available, public servers-transmitters (nodes) run by volunteers around the world. Then, it randomly selects three of them to create an encrypted circuit (circuit):
-
Entry/Guard Node: The first server in a circuit. It knows the user’s real IP address, but does not know which destination server the user wants to connect to.
-
Middle/Relay Node: The second server on the route. It only knows the address of the input node and the output node. It does not know who the user is or the purpose of his communication.
-
Exit Node (Exit Node): The last server in the circuit. It is the one that connects to the target website. It knows the destination of the connection, but does not know the real IP address of the user - it only sees the address of the intermediate node.
The data sent by the user is encrypted three times, layer by layer, like the scales of an onion. Each successive node in the circuit is able to remove (decrypt) only one layer of encryption. This ensures that no single point in the network knows the entire communication path - from the user to the destination server. It is this mechanism that provides a high level of anonymity. Access to .onion’s hidden services works in a similar, even more complex way, where both the user and the server hide their location, meeting at an anonymous “dating point” inside the Tor network.
For what legitimate purposes do journalists, activists or law enforcement agencies use the Dark Web?
Although the Dark Web is largely associated with criminal activity, the high level of anonymity it offers also makes it a valuable tool for many groups that need to protect their identities and communications for legitimate and legitimate reasons.
Journalists and whistleblowers (whistleblowers) often use Tor networks and hidden services to communicate securely with their sources. Anonymity allows whistleblowers to pass on sensitive information about corruption, abuse of power or criminal activity without fear of deconfliction or retribution. Many high-profile editorial boards, such as The New York Times and The Guardian, have their own dedicated “contact boxes” on the Tor network (known as SecureDrop) to facilitate the secure transmission of information.
For political activists, human rights defenders and ordinary citizens living in countries with authoritarian regimes where the Internet is censored and free expression is suppressed, Tor is often the only way to access independent information, bypass blockades and organize without risk of arrest. It allows them to access blocked social media, news sites and communicate safely with each other.
Interestingly, the Dark Web is also actively used by law enforcement and intelligence agencies around the world. They use it to conduct undercover operations, infiltrate criminal groups, collect evidence and monitor the activities of terrorists or drug traffickers. The anonymity of the Tor network allows them to conduct operations without exposing their true identities.
What company data (passwords, databases) is traded on black market forums?
Black market forums and trading platforms in the Dark Web are bustling centers of the cybercriminal economy. A wide range of illegal goods and services are traded there, and data stolen from companies is one of the most valuable and sought-after products. The type of data sold varies widely.
One of the most popular commodities is credentials, or simply logins and passwords for various types of services. These can be data for individual accounts (e.g., email, social media, bank accounts), but also, much more dangerously, credentials for corporate systems. For sale are access credentials to VPN accounts, website administration panels or RDP (Remote Desktop Protocol) systems, which give direct access to a company’s internal network.
Of great value are complete databases stolen from company servers. These can be customer databases containing names, addresses, phone numbers, e-mail addresses and sometimes even purchase history. Such databases are used for massive phishing campaigns, fraud and identity theft. Equally valuable is credit card data, which allows unauthorized transactions.
Intellectual property and company secrets - stolen software source code, new product design data, business strategies or research results - are also for sale. In addition, there is a thriving trade in ready-made exploits (tools for exploiting security vulnerabilities) and access to already hacked corporate networks (so-called “initial access brokers”) on hacking forums, which allows other criminal groups to quickly deploy, for example, a ransomware attack.
What are the basic safety rules to follow when exploring these areas of the network?
Exploring hidden parts of the Internet, even for research or analytical purposes, is a very high-risk activity. It is imperative to follow strict security rules to minimize the risk of malware infection, decryption or becoming a target of attack.
1 Use a dedicated, isolated environment: Never, under any circumstances, connect to the Tor network from a computer on which you store any important data - private or corporate. The safest approach is to use a dedicated virtual machine (VM) or a separate, physical computer dedicated only to this purpose. After each session, the VM should be restored to a clean, initial state (“snapshot”). An alternative is to run an operating system designed for anonymity, such as Tails, from a USB stick.
2 Maximize your identity: Take care to be completely anonymous. Do not use your real name or any alias you use elsewhere. Use a dedicated, anonymous email address set up specifically for this activity. Cover the camera on your laptop. Never log into your real social media accounts or email while connected to the Tor network.
3 Don’t trust anyone or anything: Treat every site and every user as a potential threat. Never download or open any files from the Dark Web, as it is almost certain that they contain malware. Disable scripts (e.g. JavaScript) in your Tor browser, as they can be used for de-anonymization. Do not click on suspicious links and do not provide any information that could identify you.
4 Use a VPN in conjunction with Tor (VPN-over-Tor): For an extra layer of security, it’s a good idea to connect to a trusted VPN service first and then launch the Tor browser. This way, your ISP won’t know you’re connecting to the Tor network (it will only see the connection to the VPN server), and the Tor entry node won’t know your real IP address (it will see the IP address of the VPN server).
What are the risks of downloading any files from the Dark Web?
Downloading files from the Dark Web is one of the riskiest activities one can undertake on the Internet, and it is one that should be absolutely avoided. The anonymous and unregulated nature of this network makes it an ideal environment for the distribution of all kinds of malware, and the user has virtually no way of verifying what the downloaded file actually contains.
The biggest and almost certain risk is malware infection. Files shared on the Dark Web, especially those that promise free access to paid programs, videos or other attractive content, are overwhelmingly “bait” containing hidden malicious code. This can include:
-
Ransomware that encrypts all files on your drive.
-
Keylogger or spyware that will record everything you type on the keyboard (including passwords) and take screenshots.
-
Remote Access Trojan (RAT) that will give the attacker full control over your computer.
-
A cryptocurrency miner (cryptominer) that will use your computer’s computing power in the background to generate profits for the criminal.
Downloading and running such a file on a company computer can lead to the compromise of the organization’s entire network. The malware can spread to other computers, encrypt servers or steal the most valuable corporate data. Even if the file is downloaded in an isolated environment (e.g. on a virtual machine), there is still a risk that advanced malware will be able to “escape” from the virtual machine and infect the host system.
Moreover, simply downloading certain types of files (e.g. copyrighted material or illegal content) can have serious legal consequences. Even if the Tor network provides a high level of anonymity, it is not 100 percent, and law enforcement agencies around the world have increasingly sophisticated methods of identifying users involved in criminal activity. The risks are simply disproportionate to any potential benefits.
How do we monitor the Dark Web for information about data leaks from our company?
Proactive Dark Web monitoring is a key component of a modern Threat Intelligence strategy. It allows a company to detect early on that its data (e.g., employee logins and passwords, customer data) has leaked and is being traded on the black market. Such knowledge makes it possible to take immediate countermeasures (e.g., resetting passwords) before the data is used to launch an attack.
Manual, stand-alone monitoring of the Dark Web is an extremely difficult, time-consuming and risky task. It requires specialized knowledge, adequate security measures (working in an isolated environment) and access to closed, often reputation-demanding hacking forums. That’s why most companies choose to use specialized, commercial Dark Web monitoring services.
These services, offered by cybersecurity companies, operate on automated platforms that constantly scan well-known forums, marketplaces and pastebins in the Dark Web. Customers define the keywords to be monitored - most often the company’s Internet domain (@twojafirma.pl), the names of key products, and sometimes even the names of board members. If the system finds a mention of the monitored domain, for example, in a newly published database of email addresses and passwords, it immediately generates a security alert and notifies the customer.
With such an alert, the company learns about the leak almost in real time. It can immediately identify which employees are affected by the leak and force them to change their passwords on all systems. It can also analyze from which service the leak occurred (often employees’ private accounts, where they used a company email and the same password as in the company) and take appropriate educational measures. Proactive Dark Web monitoring turns a company from a passive victim into an active participant in the intelligence game.
Is it safe to use the Tor network from a company computer?
Absolutely not. It is extremely dangerous and irresponsible to use the Tor network from a standard company computer connected to the corporate network. It is a serious violation of all security rules and poses a multifaceted risk to both the employee himself and the entire organization.
First, as mentioned earlier, installing and running unauthorized software such as the Tor browser is in itself a violation of security policies. But the main risk lies in the fact that traffic from the Tor network is a powerful wake-up call for security teams and monitoring systems. Network administrators see attempts to connect to IP addresses known to be Tor ingress nodes. Such activity immediately draws attention and can trigger an internal investigation, as this is typical behavior for malware or an employee trying to hide their activities.
Second, using Tor from a computer that is part of a corporate domain and contains access to sensitive data drastically increases the risk of compromise. Even if an employee has good intentions, his or her activity on the Tor network exposes him or her to malware and advanced attacks that can lead to taking control of his or her machine. A computer compromised in this way becomes an ideal launching point for a hacker to attack an entire company’s internal network.
Third, such activity can have negative consequences for a company’s reputation. IP addresses of Tor network exit nodes are often blacklisted (blacklisted) by many Internet services. If traffic from a company’s network exits through a Tor node, the company’s public IP address may be mistakenly linked to criminal activity and blocked, making it difficult for legitimate business operations. Therefore, every company’s security policy should explicitly prohibit the use of Tor networks on company devices, except in tightly controlled and isolated environments used by security teams.
What are the best practices for protecting against Dark Web threats?
Protecting against threats that originate in the Dark Web requires a multi-layered and proactive approach. It’s not a matter of fighting the Tor network itself, but of building the kind of organizational and technical resilience that minimizes the risk that corporate data will end up there or that threats from there will infiltrate our network.
1 A solid preventive foundation: The foundation is to implement all key security features that protect against standard attack vectors. This includes hardening systems, regular vulnerability and patch management, strong access controls based on the principle of lowest privilege and mandatory MFA, as well as advanced endpoint protection (EDR) and email security. Strong prevention is the best way to prevent a primary data leak.
2 Blocking and monitoring access to Tor: Company policy must clearly prohibit the use of Tor networks, and the company’s next-generation firewalls (NGFWs) should be configured to block traffic to known Tor network nodes and identify and block the protocol itself based on deep packet inspection. SIEM and NDR systems should be configured to immediately alert on any attempts at such communications.
3 Proactive monitoring of the Dark Web: As described earlier, a company should implement a process or service to continuously monitor the Dark Web for mentions of its domain, brands, and employee logins and passwords. Early detection of a leak allows for immediate response and minimization of damage.
4 Building employee awareness: Continuous education of the team is the most important element. Employees need to be aware of threats such as phishing and understand why using strong, unique passwords and not using a company email address for personal use is so crucial. An informed employee is the best defense against social engineering attacks, which are often the first step leading to data leakage.
How can nFlo’s Threat Intelligence services and consulting help your company monitor threats and protect itself from Deep and Dark Web risks?
At nFlo, we understand that protecting against modern threats requires a proactive approach and knowledge that goes beyond defending your own infrastructure. You need to know what threats are emerging and what data is circulating in hidden parts of the Internet. Our Threat Intelligence and cybersecurity consulting services are designed to give your company the knowledge and tools to effectively protect against Deep and Dark Web risks.
As part of our Threat Intelligence services, we offer proactive monitoring of the Dark Web. Using advanced tools and the expertise of our analysts, we constantly scour black market forums and marketplaces for information that may affect your company. We alert you immediately as soon as we identify leaks of your employees’ credentials, mentions of your company in the context of planned attacks, or sales of data that may have been stolen from your systems. We give you the knowledge to react before disaster strikes.
Our consulting services help build a comprehensive defense strategy. We help you create and implement effective security policies that govern software use and network access. As part of audits and penetration tests, we verify that your infrastructure is immune to techniques used by criminals. Crucially, we place great emphasis on education and awareness building. Our training programs teach employees how to recognize threats and how their daily, informed actions contribute to protecting the entire organization.
When you work with nFlo, you get a partner who can not only help you close your doors against threats, but also “put your lookouts” far beyond the walls of your company, giving you early warning of impending danger. In a world where information is a weapon, we give you a shield.
Related Terms
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,…
Learn More
Explore related articles in our knowledge base:
- What is a VPN and how to use private networks safely?
- What is AWS and how to safely use Amazon’s cloud to grow your business?
- Amendment to the NSC Act (NIS2): What new obligations await Polish companies and how to prepare for them?
- Application for the
- Backup Microsoft Entra ID: Why Identity Protection Is Essential Today
Explore Our Services
Need cybersecurity support? Check out:
- Security Audits - comprehensive security assessment
- Penetration Testing - identify vulnerabilities in your infrastructure
- SOC as a Service - 24/7 security monitoring
Related topics
See also:
