How to identify and crack a WoltLab Burning Board 3.x hash

WoltLab Burning Board 3.x is a application 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 WoltLab Burning Board 3.x entirely in your browser — your hash is never uploaded. A typical example looks like this:

8084df19a6dc81e2597d051c3d8b400787e2d5a9:21c563e85d2c4c93a26b6ec2c5a08bc24c3f50f2

Cracking WoltLab Burning Board 3.x with hashcat

Save the hash to a file and run hashcat in mode -m 8400. Start with a wordlist such as rockyou.txt:

echo '8084df19a6dc81e2597d051c3d8b400787e2d5a9:21c563e85d2c4c93a26b6ec2c5a08bc24c3f50f2' > hash.txt && hashcat -m 8400 hash.txt /usr/share/wordlists/rockyou.txt

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

echo '8084df19a6dc81e2597d051c3d8b400787e2d5a9:21c563e85d2c4c93a26b6ec2c5a08bc24c3f50f2' > hash.txt && hashcat -m 8400 hash.txt /usr/share/wordlists/rockyou.txt -r /usr/share/hashcat/rules/best64.rule

Cracking WoltLab Burning Board 3.x with John the Ripper

John the Ripper can attack the same hash with the wbb3 format:

echo '8084df19a6dc81e2597d051c3d8b400787e2d5a9:21c563e85d2c4c93a26b6ec2c5a08bc24c3f50f2' > hash.txt && john --format=wbb3 --wordlist=/usr/share/wordlists/rockyou.txt hash.txt