LeakBase B3RL1N Dropped 19.6M Stealer Lines With 3.4M Unique Logins

HEROIC analysts tracked the LeakBase B3RL1N 19.6M ULP release on February 4, 2025, posted as 19KK ULP-LOG-PASS @B3RL1N on a major underground hacking forum. The 19.6 million line archive deduplicates to 3,478,105 unique records containing email addresses, plaintext passwords, and homepage URLs.

Why This Stealer Log Is Dangerous

The B3RL1N series is a recurring publisher on LeakBase, and the 19.6M drop sits between smaller and larger variants. Plaintext passwords with captured URL context mean there is no cracking barrier, no guessing about what each credential unlocks, and no friction for automated credential stuffing.

What Was Exposed in LeakBase B3RL1N 19.6M ULP

• Email addresses tied to specific online services
• Plaintext passwords harvested from browsers
• HomePage URLs identifying the compromised login

Why This Matters

Attackers filter B3RL1N style dumps by domain to produce targeted attack lists against banking, crypto, and enterprise SaaS. Every record is pre-validated by the infostealer that captured it. Reused passwords turn a single credential into account takeover across email, banking, shopping, and identity services.

How Stealer Logs Work

Infostealers scrape saved credentials, cookies, and autofill fields from infected browsers and upload the haul to operator servers. Operators bundle thousands of victim machine logs into ULP files and publish them on forums like LeakBase. Buyers parse the file and launch credential stuffing within hours.

Check If You Are Affected

Run HEROIC's free exposure scan against 400 billion plus indexed records to check whether your email appears in B3RL1N 19.6M or any related stealer log.