How to identify and crack a Keccak-224 hash

Keccak-224 is a raw / unsalted hash type. It is fast and typically unsalted, which makes weak passwords recoverable quickly on consumer GPU hardware. This page shows how to recognise it and the exact commands to attack it.

All identification runs locally in WebAssembly. The commands below write the hash to a local file on your machine — nothing is sent to this site.

Identifying the hash

The hash identifier on the home page detects Keccak-224 entirely in your browser — your hash is never uploaded. A typical example looks like this:

f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd

Cracking Keccak-224 with hashcat

Save the hash to a file and run hashcat in mode -m 17700. Start with a wordlist such as rockyou.txt:

echo 'f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd' > hash.txt && hashcat -m 17700 hash.txt /usr/share/wordlists/rockyou.txt

Add a rule set to mutate dictionary words (capitalisation, leetspeak, appended digits) and dramatically widen coverage:

echo 'f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd' > hash.txt && hashcat -m 17700 hash.txt /usr/share/wordlists/rockyou.txt -r /usr/share/hashcat/rules/best64.rule