sha256(sha256_raw($pass))) Hash

What is sha256(sha256_raw($pass)))?

The cryptographic hash format `sha256(sha256_raw($pass))` represents a double-hashing scheme where the input password (or raw data) undergoes two sequential SHA-256 hashing operations. Originating from early password storage best practices, this technique was introduced to mitigate the risk of precomputed rainbow table attacks by increasing computational overhead. Structurally, it consists of two nested SHA-256 hashes: the raw password is first hashed using SHA-256, and the resulting 256-bit hash is then hashed again with SHA-256, yielding a 32-byte (256-bit) output. While not explicitly standardized, this method was widely adopted in legacy systems—particularly in Unix-like environments (e.g., early OpenBSD or custom authentication schemes)—to obfuscate plaintext passwords before storage. Its primary use-case was securing password hashes against brute-force and dictionary attacks by introducing non-invertibility and resistance to direct lookup attacks, though it was later superseded by more robust schemes like bcrypt, Argon2, or PBKDF2 with salts.

This format is fundamentally vulnerable to cracking due to its inherent weaknesses in modern cryptographic standards. The primary flaw lies in its **lack of salting**, making it susceptible to offline dictionary attacks when hash databases are exposed. Even without salting, the double-hashing introduces only marginal security gains—SHA-256 is already designed to resist collision resistance and preimage attacks under ideal conditions, but the redundancy offers no meaningful entropy boost. More critically, the algorithm is highly optimized for GPU/ASIC acceleration (e.g., via CUDA or FPGA implementations), enabling attackers to perform **massive parallel brute-force searches** at speeds far exceeding CPU-only methods. Additionally, the fixed-length output (256 bits) allows for **birthday attack optimizations**, where collision probabilities are exploited to reverse-engineer inputs. Finally, the absence of key stretching (e.g., iterative hashing with delays) renders it ineffective against modern hardware-accelerated cracking tools like Hashcat, which can evaluate billions of hashes per second. These factors collectively render `sha256(sha256_raw($pass))` obsolete for serious security applications.

Identifying sha256(sha256_raw($pass))) Hashes

Identifying a hash blindly is often difficult because multiple algorithms can output strings of the exact same length. For example, a standard 32-character hexadecimal string could be MD5, NTLM, MD4, or LM. To definitively identify sha256(sha256_raw($pass))), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack sha256(sha256_raw($pass)))

If you need to recover the plaintext password for a sha256(sha256_raw($pass))) hash during a penetration test or forensics investigation, you must supply the correct module ID to your cracking software. Use the exact commands provided at the top of this page to target the hash successfully.