A sales department employee opens Microsoft Teams. Suddenly an error window appears: “A problem occurred with a Teams component. To fix it, copy the code below into PowerShell terminal.” The employee wants to get back to work, so they follow the instructions. A few seconds later, malicious software is running on their computer – and they installed it themselves, bypassing all company security measures. Welcome to the world of ClickFix attacks.
ClickFix is the fastest-growing social engineering threat of 2025. According to industry data, the number of attacks using this technique increased by 517% over the past year. This isn’t phishing evolution – it’s an entirely new attack vector that makes traditional “don’t click on links” training useless. The employee doesn’t click a link – they paste malicious code themselves, convinced they’re fixing a technical problem.
How exactly does a ClickFix attack work?
The ClickFix mechanism is diabolically simple. Attackers create a fake error window that looks like a system message from a popular program – Microsoft Teams, Google Chrome, Zoom, Slack. The window reports an error and offers a “solution”: copying a code snippet and pasting it into the terminal or command prompt.
The key is exploiting user trust in a familiar interface. The message looks authentic – it has the correct logo, fonts, colors. The user has seen similar error windows before. There’s no reason to suspect it’s a fake.
The second element is exploiting the desire to solve a problem. The employee wants to get back to work. The message suggests a simple fix. The instructions seem technical but doable. Instead of reporting the problem to IT (which will take time), the user “fixes” the error themselves.
The third element is bypassing traditional security. The code isn’t downloaded from the internet – it’s pasted by the user. The antivirus doesn’t see an attachment to block. The web filter doesn’t see a malicious link. It’s the user – legitimate, logged in, with full permissions – who runs the malicious command.
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Why does ClickFix bypass traditional anti-phishing training?
For years we’ve trained employees: “Don’t click suspicious links,” “Don’t open attachments from unknown senders,” “Check the sender’s email address.” This advice is still important, but ClickFix bypasses it.
ClickFix doesn’t require clicking a link. The malicious code is presented directly on screen – the user copies and pastes it. There’s no link to check, no attachment to scan.
ClickFix doesn’t come by email. Fake error windows appear during normal work – browsing a website, using an application. The user doesn’t receive a suspicious message to verify.
ClickFix uses the context of “fixing a problem,” not “following an external command.” The employee doesn’t feel they’re following orders from a stranger – they feel they’re fixing their own computer. This is a fundamental psychological difference.
Which programs are most commonly imitated in ClickFix attacks?
Attackers choose programs that are widely used and whose errors aren’t surprising. At the top of the list are:
Microsoft Teams – due to its prevalence in corporate environments and frequent real technical problems. Employees have gotten used to minor Teams glitches and aren’t surprised by another problem message.
Google Chrome – the most popular browser, often displaying update and error messages. A fake “Chrome needs repair” window looks credible.
Zoom and other video conferencing applications – popular post-pandemic, often causing real technical problems with cameras or microphones.
Microsoft Office – Word, Excel, PowerPoint. Messages about macro or add-in problems don’t raise suspicion.
Slack – similar to Teams, a popular communication platform in tech companies.
What malicious code is used in ClickFix attacks?
The code presented to users is usually encrypted or obfuscated to avoid raising suspicion. A typical example is a PowerShell command that downloads and runs the actual payload from an external server.
The first phase is a simple downloader – a few lines of code that download the actual malware. This phase is presented to the user as “repair code.”
The second phase is the actual payload – it could be a stealer (stealing passwords and data), a RAT (remote access for the attacker), ransomware, or a dropper installing additional malware.
The third phase is persistence – the malware saves itself to autostart, task scheduler, or registry to survive a computer restart.
Particularly dangerous is that the code runs with user permissions – often with local administrator privileges. This gives the attacker full control over the workstation.
How can EDR systems detect a ClickFix attack?
Modern EDR (Endpoint Detection and Response) systems are capable of detecting ClickFix attacks, even though the user initiates them. The key is behavioral analysis, not signature-based detection.
EDR monitors process behavior, not just signatures. When a user pastes code into PowerShell, EDR sees what that code does: tries to download a file from the internet, modifies the registry, creates new processes. These behavior patterns are characteristic of malware – regardless of who initiated the execution.
IBM QRadar EDR with NanoOS technology operates at the hypervisor level – below the operating system. It sees all operations, even those initiated by an authorized user. When it detects a pattern characteristic of an attack (kill chain), it can block execution – even if the user consciously ran the code.
Auto-isolation function is also key. When EDR detects suspicious activity, it can immediately disconnect the computer from the network – before malware can contact the C2 server or spread to other systems.
How do you train employees to recognize ClickFix?
Traditional anti-phishing training must be supplemented with new elements. Employees must know that ClickFix exists and how it works.
First rule: no legitimate program asks you to paste code into a terminal. Microsoft, Google, Zoom – none of these companies solve problems through “paste this code” instructions. If you see such an instruction, it’s an attack.
Second rule: any error message requiring user action should be verified by IT. Real errors can be fixed without pasting code – restart, reinstall, update. Suspicious messages should be reported.
Third rule: terminals (PowerShell, CMD, Terminal) are advanced tools. Regular users shouldn’t use them to “fix errors.” If something requires a terminal, it’s a task for IT.
ClickFix attack simulations should become part of regular security awareness exercises – similar to phishing simulations.
What technical mechanisms can limit ClickFix risk?
Beyond training, organizations can implement technical mechanisms to limit risk.
First is restricting permissions to run PowerShell and other script interpreters. Regular users rarely need PowerShell – its availability can be limited to administrators.
Second is implementing Application Control – whitelists of allowed applications. If malware downloaded through ClickFix isn’t on the list, it won’t run.
Third is monitoring script execution. Every PowerShell, cmd, bash execution should be logged and analyzed. Unusual commands (downloading from the internet, base64 encoding, registry modifications) should generate alerts.
Fourth is network segmentation. Even if one workstation is compromised, segmentation limits the ability for the attack to spread to critical systems.
How do you respond to a detected ClickFix attack?
When you suspect an employee has fallen victim to ClickFix, quick response is crucial.
The first step is isolating the infected computer from the network – physically disconnecting the cable or disabling WiFi. Don’t shut down the computer – this could destroy evidence and activate malware’s destructive mechanisms.
The second step is notifying the security team/SOC. Professionals should analyze exactly what the user ran and what the consequences might be.
The third step is forensic analysis – what the malware did, what data it might have stolen, whether it spread to other systems. EDR should provide a detailed timeline of all operations.
The fourth step is remediation – removing the malware, resetting user passwords, verifying other systems the user had access to.
The fifth step is reporting – if personal data was breached, notification to data protection authorities and industry regulators may be required.
How does ClickFix fit into the broader threat landscape?
ClickFix is part of a broader trend: attackers increasingly use users themselves as an attack vector, instead of trying to break through technical security.
Living off the Land – attacks using legitimate system tools (PowerShell, WMI, certutil) instead of dedicated malware.
Supply Chain Attacks – attacks through trusted vendors whose software is automatically accepted by security measures.
Social Engineering 2.0 – increasingly sophisticated manipulation techniques, using work context, knowledge of company procedures, personalization.
ClickFix combines these trends: it uses legitimate tools (PowerShell), bypasses security through user trust, and employs sophisticated social engineering (fake error messages).
Strategic defense against ClickFix
| Defense layer | Mechanism | Effectiveness |
|---|---|---|
| Awareness | ClickFix training, simulations | Medium (depends on user) |
| Endpoint | EDR with behavioral analysis | High |
| Permissions | Restricting PowerShell access | High for regular users |
| Applications | Application Control, whitelisting | High |
| Monitoring | Script execution logging and analysis | High (for detection) |
| Network | Segmentation, restricting outbound traffic | Medium (limits impact) |
Summary
ClickFix represents a new generation of social engineering attacks that requires a new defense approach. Traditional “don’t click on links” training is insufficient when users paste malicious code themselves, convinced they’re fixing a problem.
Effective defense requires a combination of education (new rules: “never paste code into a terminal”), technology (EDR with behavioral analysis, restricting access to script interpreters), and processes (rapid incident response, regular simulations).
A 517% increase in one year shows that ClickFix works – and that attackers will use it more frequently. Organizations that ignore this threat will learn about its effectiveness firsthand.
Want to check if your organization is resilient against ClickFix attacks? nFlo experts will conduct an attack simulation and assess the effectiveness of your security. Contact us.
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