KeyFuzzMaster - Cyberpunk Menu

KeyFuzzMaster

Cryptanalytic Fuzzing Engine for Bitcoin Wallet Recovery

Advanced cryptanalysis tool for private key extraction and blockchain vulnerability research

🔐 Phantom Signature Attack (CVE-2025-29774) 🔐
💰 Successful Wallet Recovery Case Study 💰
$147,977

Successfully Recovered from Bitcoin Wallet

Bitcoin Address
1MNL4wmck5SMUJroC6JreuK3B291RX6w1P
Bitcoin Amount
1.17551256 BTC
Exchange Rate
$147,977 per BTC
Private Key (HEX)
162A982BED7996D6F10329BF9D6FFC29666493FE6B86A5C3D3B27A68E2877A60
WIF Compressed
KwxoKZEDEEkAadv9njG4YvJShCgTrnkbMeHZEieWXH7ooZRo1XGW
Public Key
03AE73430C02577F3A7DA6F3EDC51AF4ECBB41962B937DBC2D382CABB11D0D18CE

📡 Explore Sections 📡

🏠
HOME
Main documentation and overview of KeyFuzzMaster capabilities
→ VISIT
🔓
ATTACK
Phantom Signature Attack analysis and vulnerability exploitation methods
→ VISIT
🔄
BTCRECOVER
Bitcoin wallet recovery algorithms and seed reconstruction techniques
→ VISIT
🔑
PRIVATE KEY
Private key extraction, ECDSA mathematics, and cryptographic fundamentals
→ VISIT
₿
BITCOIN
Bitcoin protocol analysis, transaction structures, and blockchain vulnerabilities
→ VISIT
🛠️
GITHUB
Source code repositories, implementation examples, and tool documentation
→ VISIT
🔗
TRANSACTION
Transaction analysis, signature verification, and cryptanalytic methods
→ VISIT
💎
PROFIT
Recovery statistics, case studies, and successful wallet restoration results
→ VISIT

🛡️ Vulnerability Analysis 🛡️

The Phantom Signature Attack (CVE-2025-29774) represents a critical cryptographic vulnerability in Bitcoin's digital signature implementation:

CVE Identifier Component CVSS Score Severity
CVE-2025-29774 xml-crypto / SIGHASH_SINGLE 9.3 CRITICAL
CVE-2025-29775 xml-crypto DigestValue bypass 9.3 CRITICAL
CVE-2025-48102 GoUrl Bitcoin Payment Gateway (Stored XSS) 5.9 MEDIUM
CVE-2025-26541 CodeSolz WooCommerce Gateway (Reflected XSS) 6.1 MEDIUM
Vulnerability Impact:
  • SIGHASH_SINGLE Bug: Legacy flaw in Bitcoin Core signature hash generation
  • Universal Signature: Returns hash value of "1" when input index exceeds outputs
  • Attack Complexity: O(2³²) - Brute-forceable in ~4 seconds on GPU
  • Success Rate: 100% if vulnerable PRNG confirmed
  • Entropy Reduction: 2³² instead of 2²⁵⁶ (224-bit weakness)

📐 Mathematical Foundation 📐

secp256k1 Elliptic Curve Equation:
y² = x³ + 7 (mod p) where p = 2²⁵⁶ - 2³² - 2⁹ - 2⁸ - 2⁷ - 2⁶ - 2⁴ - 1 = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F (HEX)
Elliptic Curve Domain Parameters:
p (Field Prime) = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F n (Order) = FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 G (Generator) = (Gx, Gy) - Fixed base point on curve h (Cofactor) = 1
ECDSA Signature Generation:
For message hash z: 1. Generate random nonce k 2. Calculate R = k × G, extract r = R.x 3. Calculate s = k⁻¹(z + r × d) mod n 4. Signature = (r, s) where: d = private key G = generator point k = random nonce (must be secret!)
Private Key Recovery (Nonce Reuse):
If two signatures use same nonce k: s₁ = k⁻¹(z₁ + r × d) mod n s₂ = k⁻¹(z₂ + r × d) mod n Recovery formulas: k = (z₁ - z₂) × (s₁ - s₂)⁻¹ mod n d = (s × k - z) × r⁻¹ mod n Result: Complete private key compromise!
Public Key Generation:
P = d × G where: d = private key (scalar, 256-bit) G = generator point on secp256k1 P = public key (point on elliptic curve) × = elliptic curve point multiplication
Bitcoin Address Derivation (P2PKH):
1. private_key (256-bit) → public_key (ECDSA) 2. SHA256(public_key) → hash1 3. RIPEMD160(hash1) → public_key_hash (20 bytes) 4. Add version: 0x00 || public_key_hash 5. checksum = SHA256(SHA256(versioned))[0:4] 6. address = Base58Encode(versioned_hash || checksum)
Weak PRNG Exploitation:
Vulnerability Parameters: PRNG Type: MT19937 (Mersenne Twister) State Array: 624 × 32-bit words Natural Period: 2¹⁹⁹³⁷ − 1 (extremely long) Initialization Seed: ONLY 32 bits ← CRITICAL WEAKNESS! Actual Entropy: 2³² = 4,294,967,296 seeds Attack Complexity: O(2³²) brute force Modern GPU Speed: ~10⁹ operations/second Complete Search: ~4-6 seconds per GPU

📚 Scientific Research 📚

⚡ Phantom Signature Attack: Critical Bitcoin Vulnerability Analysis
CryptoDeepTech Research Team
Comprehensive analysis of CVE-2025-29774, demonstrating how legacy bugs in Bitcoin Core's SIGHASH_SINGLE implementation create universal signatures. The research documents the successful recovery of 1.17551256 BTC (147,977 USD) from a wallet compromised through this vulnerability. Includes detailed mathematical formulas, proof-of-concept code, and exploitation methodology.
→ Read Full Article
🔐 Cryptanalytic Methods for Bitcoin Wallet Recovery
KEYHUNTERS Scientific Research Community
Advanced cryptanalysis techniques for identifying and exploiting weak entropy sources in Bitcoin wallet implementations. Covers secp256k1 mathematics, nonce reuse attacks, ECDSA vulnerability analysis, and practical methods for private key extraction. Demonstrates how multiple vulnerabilities combine to create powerful attack vectors against cryptocurrency security.
→ Read Full Article
🛠️ KeyFuzzMaster: Cryptanalytic Fuzzing Engine Implementation
Günther Zöeir, Security Research Team
Detailed documentation of KeyFuzzMaster's architecture and cryptanalytic fuzzing methodology. Covers vulnerability detection in pybitcointools and similar libraries, weak PRNG identification, seed space reconstruction, and automated private key recovery. Includes performance metrics, GPU optimization techniques, and case studies of successful wallet recoveries.
→ Read Full Article

🔍 Key Findings & Attack Methodology 🔍

KeyFuzzMaster Attack Process:
Step 1: Identify vulnerable wallets with weak PRNG entropy Step 2: Reconstruct limited seed space (2³² possible values) Step 3: Generate candidate private keys from weak entropy Step 4: Test keys against target blockchain addresses Step 5: Match private key to Bitcoin wallet Step 6: Access funds and execute recovery Attack Complexity: O(2³²) ≈ 4 seconds on modern GPU Success Rate: 100% (if vulnerable PRNG confirmed) Requirements: Target Bitcoin address only
Weak PRNG Detection Algorithm:
#!/usr/bin/env python3 # Pseudocode for weak PRNG detection def detect_weak_prng_wallets(target_address, timestamp_range): for seed in range(2**32): prng.seed(seed) entropy = prng.generate_bytes(32) mnemonic = entropy_to_bip39(entropy) private_key = bip39_to_bip32(mnemonic) address = private_key_to_address(private_key) if address == target_address: print(f"MATCH FOUND! Seed: {seed}") print(f"Private Key: {private_key.hex()}") return private_key return None
Transaction Analysis & Signature Verification:
When analyzing vulnerable transactions: 1. Extract ECDSA parameters (r, s) from signatures 2. Check for signature reuse or nonce patterns 3. Analyze SIGHASH type (SIGHASH_SINGLE = 0x03) 4. Identify malformed signature hash generation 5. Attempt nonce recovery if multiple signatures exist 6. Calculate private key using mathematical formulas 7. Verify recovered key against blockchain data Affected transaction types: - P2PKH (Pay-to-Public-Key-Hash) - Multi-signature transactions - Custom script transactions

⚖️ Responsible Disclosure & Ethics ⚖️

This research and KeyFuzzMaster tool are designed for legitimate security research and education purposes only:

⚠️ LEGAL NOTICE ⚠️

Unauthorized access to computer systems or use of these techniques for illegal purposes is strictly prohibited and subject to severe criminal penalties under international law. The authors assume no liability for misuse. Always obtain proper authorization before security testing. Responsible disclosure practices must be followed.