Cryptographic & Encryption Implementation Analyzer

Pillar 2: Analyze & Preserve

Reverse-engineer ransomware cryptographic implementations: audit PRNG entropy weaknesses, detect IV/nonce reuse, evaluate asymmetric key encapsulation (RSA/Curve25519), and score algorithmic recovery feasibility.

Target Ransomware Cipher

ChaCha20 + X25519

Active Target: LockBit 3.0 (Black)

Shannon Entropy

7.988 / 8.000

High Uniformity (Block Cipher Active)

Algorithmic Feasibility

94.5%

Strategy: Exploit Feasible

Vulnerabilities Cataloged

5 Known Flaws

2 Critical Flaws with 90%+ Recovery

Cryptographic Flaw & Implementation Vulnerability Matrix

Filter Family:

WannaCry / Wanakiwi Ephemeral Prime PersistenceIMPLEMENTATION BUG

Family: WannaCry 2.0 · Cipher: RSA-2048 + AES-128-CBC

94.5%

Recovery Feasibility

Windows CryptReleaseContext fails to zero out memory pages containing prime factors p and q from heap before freeing.

Tool: Wanakiwi / Aegis Memory CarverInspect Exploit Details

ALPHV / BlackCat Intermittent AES-CTR Padding LeakIMPLEMENTATION BUG

Family: BlackCat (ALPHV) · Cipher: AES-256-CTR / ChaCha20

68%

Recovery Feasibility

Intermittent encryption skips alternating 10MB blocks to maximize speed, leaving database and VMDK metadata tables intact in unencrypted segments.

Tool: Aegis Intermittent CarveEngineInspect Exploit Details

Phobos / Dharma Static Salt & Key Derivation WeaknessPRNG ENTROPY

Family: Phobos · Cipher: AES-CBC + Static Salt

82%

Recovery Feasibility

Key derivation uses 32-bit timestamp seeds from GetTickCount() combined with machine GUID, reducing brute-force entropy search space from 2^256 to 2^32.

Tool: Hashcat OpenCL + Aegis ClusterInspect Exploit Details

LockBit 3.0 Curve25519 Ephemeral Key EncapsulationASYMMETRIC ENCAPSULATION

Family: LockBit 3.0 (Black) · Cipher: ChaCha20 + Curve25519 (X25519)

Recovery Feasibility

Generates unique 32-byte ephemeral X25519 keypair per file, encrypts file with ChaCha20, and encapsulates session key using threat actor public key.

Tool: Aegis DecryptIQ (Backup-driven)Inspect Exploit Details

Babuk Builder Source Leak Public Master Key RecoveryASYMMETRIC ENCAPSULATION

Family: Babuk / Babuk ESXi · Cipher: ECDH (Curve25519) + Sosemanuk

91%

Recovery Feasibility

Leaked full builder source code included multiple threat actor private master keys and faulty ECDH point multiplication routines in Linux/ESXi variants.

Tool: Avast Babuk Decryptor / Aegis HubInspect Exploit Details

Selected Flaw Exploit Deep Dive

WannaCry 2.0

Exploitation Mechanism

Heap carving scans unallocated memory of wcry.exe or lsass.exe to extract prime numbers and recompute private exponent d.

Operational Constraint & Prerequisite

Must capture RAM before rebooting infected endpoints; 100% lossless decryption if heap intact.

Encrypted Sample Byte Density & Entropy

Shannon Entropy Visual Density:7.988 / 8.000 (Random/Encrypted)

00000000: 4c 4f 43 4b 42 49 54 5f  4d 45 54 41 5f 56 33 00  [LOCKBIT_META_V3.]
00000010: a4 92 f8 e1 c9 40 8b 11  3d e4 a0 99 ff 10 32 b1  [....@..=.....2.]
00000020: 89 31 b4 c2 77 12 ea 49  10 9a cd ee 04 55 ba 82  [.1..w..I.....U..]
00000030: fe dc ba 98 76 54 32 10  01 23 45 67 89 ab cd ef  [....vT2..#Eg....]

AEGIS CRYPTO-ENGINE TELEMETRY CONSOLE

CSPRNG_SEED_STATUS: OK | ASYMMETRIC_ORACLE: STANDBY

> Ready. Click "Run Cryptanalysis" or "Simulate Exploit & Key Carving" to begin reverse-engineering session.