How to identify and crack a GOST R 34.11-94 hash

GOST R 34.11-94 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 GOST R 34.11-94 entirely in your browser — your hash is never uploaded. A typical example looks like this:

2cefc2f7b7bdc514e18ea57fa74ff357e7fa17d652c75f69cb1be7893ede48eb

Cracking GOST R 34.11-94 with hashcat

Save the hash to a file and run hashcat in mode -m 6900. Start with a wordlist such as rockyou.txt:

echo '2cefc2f7b7bdc514e18ea57fa74ff357e7fa17d652c75f69cb1be7893ede48eb' > hash.txt && hashcat -m 6900 hash.txt /usr/share/wordlists/rockyou.txt

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

echo '2cefc2f7b7bdc514e18ea57fa74ff357e7fa17d652c75f69cb1be7893ede48eb' > hash.txt && hashcat -m 6900 hash.txt /usr/share/wordlists/rockyou.txt -r /usr/share/hashcat/rules/best64.rule

Cracking GOST R 34.11-94 with John the Ripper

John the Ripper can attack the same hash with the gost format:

echo '2cefc2f7b7bdc514e18ea57fa74ff357e7fa17d652c75f69cb1be7893ede48eb' > hash.txt && john --format=gost --wordlist=/usr/share/wordlists/rockyou.txt hash.txt