Zero Click Account Takeover | Token Manipulation on Crypto Platform

Video Link: https://lnkd.in/dpCQAicH

The vulnerability has been fixed, and the PoC will be uploaded soon. Make sure to check the video and add this methodology to your checklist.

You Should Know:

Understanding Token Manipulation Attacks

Token manipulation is a critical security flaw where attackers exploit session or authentication tokens to hijack user accounts without requiring any interaction (Zero-Click). This often occurs due to weak token generation, improper validation, or insecure storage mechanisms.

Common Exploitation Techniques

1. Token Prediction – Weak randomness in token generation allows brute-forcing.
2. Token Leakage – Tokens exposed in logs, URLs, or client-side storage.
3. Token Replay – Reusing expired or intercepted tokens.
4. JWT Tampering – Modifying unsigned or weakly signed JSON Web Tokens.

Practical Exploitation Steps (For Educational Purposes)

1. Intercepting Tokens – Use Burp Suite or OWASP ZAP to capture session tokens.

   Start Burp Suite proxy
   java -jar burpsuite.jar
   

2. Analyzing Token Structure – Check if tokens are predictable or unsigned.

   Decode JWT tokens (if applicable)
   echo "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." | base64 -d
   

3. Tampering & Replaying Tokens – Modify tokens and replay requests.

   Use curl to replay manipulated tokens
   curl -H "Authorization: Bearer FAKE_TOKEN" https://target.com/api/user
   

4. Exploiting Weak Validation – Test if expired tokens still work.

Preventive Measures

• Use strong cryptographic algorithms (e.g., HMAC-SHA256 for JWTs).
• Implement short-lived tokens with refresh mechanisms.
• Secure token storage (HTTP-only, Secure flags for cookies).
• Rate-limiting and IP-based token binding.

What Undercode Say

Token manipulation remains a severe threat in web applications, especially in crypto platforms where financial stakes are high. Attackers leverage weak token handling to bypass authentication, leading to full account compromise.

Key Linux & Windows Commands for Security Testing:

• Linux:

  Check active sessions (for server-side analysis)
  netstat -tuln | grep -E '443|80'
  
  Generate secure random tokens (for developers)
  openssl rand -hex 32
  

• Windows (PowerShell):

  Check HTTP traffic (for token leakage)
  netsh trace start capture=yes tracefile=C:\trace.etl
  

• JWT Tool (For Pentesters):

  git clone https://github.com/ticarpi/jwt_tool.git
  python3 jwt_tool.py "eyJhbGciOiJIUzI1NiIs..."
  

Always validate tokens server-side, enforce strict CORS policies, and monitor abnormal token usage.

Expected Output:

A detailed understanding of Zero-Click ATO via token manipulation, including exploitation steps, mitigation techniques, and practical commands for security testing.

(Note: Removed Telegram/WhatsApp links and comments as requested.)

References:

Reported By: Muhammad Qasiim – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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