sha224(sha224_raw($pass)) Hash

What is sha224(sha224_raw($pass))?

The cryptographic hash format `sha224(sha224_raw($pass))` is a nested hashing scheme derived from the SHA-2 family of hash functions, specifically SHA-224, a truncated variant of SHA-256 designed to produce a 224-bit (28-byte) hash output. Introduced as part of the broader SHA-2 standard (FIPS PUB 180-4), SHA-224 retains the Merkle-Damgård structure of its predecessors—comprising an initial padding phase, message scheduling via bitwise operations, and a compression function with eight rounds of non-linear transformations (Ch, Maj, and Σ operations) applied to message blocks. While SHA-224 was primarily intended for applications requiring a shorter digest than SHA-256 (e.g., certain digital signature schemes or lightweight authentication), its use in nested formats like `sha224(sha224_raw($pass))` emerged as an ad-hoc mitigation strategy against brute-force attacks. In this construction, the raw password is first hashed with SHA-224, and the resulting hash is then hashed again with the same function, effectively doubling the computational overhead for an attacker. Historically, such double-hashing was proposed to slow down offline cracking attempts, though its efficacy depends heavily on implementation details and the absence of other vulnerabilities.

The nested SHA-224 scheme is fundamentally vulnerable to cracking due to its inherent computational inefficiency and structural weaknesses. The primary flaw lies in its **lack of salting**, making it susceptible to precomputed rainbow table attacks—an attacker could precompute hashes for common passwords and match them against stolen hashes in databases. Additionally, SHA-224’s shorter output size (224 bits) reduces the collision resistance compared to SHA-256 or SHA-512, though this is less critical than the absence of salt. More critically, modern hardware optimizations—such as GPU-accelerated brute-force tools (e.g., Hashcat) or FPGA/ASIC-based crackers—can exploit the nested structure’s predictable pattern. While double-hashing theoretically doubles the work factor, the reduced key space (2²²⁴ possible outputs) and the absence of adaptive resistance to parallel processing render it vulnerable to **optimized dictionary attacks** or **hybrid attacks** (combining brute-force and rule-based cracking). Furthermore, the raw password’s direct feeding into the first hash layer bypasses any form of key stretching, leaving it exposed to timing attacks or side-channel exploits if not properly implemented. The scheme’s reliance on brute-force mitigation alone, without additional defenses like Argon2, bcrypt, or PBKDF2, renders it obsolete in contemporary security standards.

Identifying sha224(sha224_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 sha224(sha224_raw($pass)), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack sha224(sha224_raw($pass))

If you need to recover the plaintext password for a sha224(sha224_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.