The Sirumem Breach Quietly Exposed 300 vBulletin Password Hashes

HEROIC analysts identified a database breach tied to Sirumem, a Russian general discussion forum, dated September 1, 2015. The breach affected 300 accounts. HEROIC's records confirm the exposed passwords were stored in vBulletin's hashing format; other specific data types tied to this incident were not separately catalogued.

Why This Is Dangerous

vBulletin's password hashing has long been considered weak by modern standards, and password-cracking tools built specifically to target it are widely available. That means any password from this leak has a real chance of being recovered by an attacker, especially if it was short or based on a common word or phrase.

What Was Exposed

• Account passwords, stored using vBulletin's hashing method

Why This Matters

Once a vBulletin password hash is cracked, it becomes a plain, readable password that an attacker can try against other accounts belonging to the same person. Forum passwords are frequently reused elsewhere, including on email or shopping accounts, which means a cracked password from a small, quiet leak like this one can still open doors far beyond the original forum.

How Database Breaches Like This Happen

This incident is classified as a database breach, meaning attackers accessed Sirumem's backend directly and extracted stored account data rather than targeting individual users. Older forum software like vBulletin has a long history of known vulnerabilities, and breaches like this one often surface quietly, years after the fact, once the data begins circulating among smaller trading circles.

Check If You Are Affected

If you ever had an account on Sirumem, it is worth checking whether your information was part of this leak, especially if you have reused passwords across other sites. HEROIC's free breach scanner searches a database of more than 400 billion breached records to tell you instantly if your email address has been exposed in this or any other breach.