Why LeakBase 25Kk ULP Is in Trouble: 3M Records in Criminal Hands

HEROIC found the LeakBase 25Kk ULP by FobiBoom Stealer log breach dated April 2024, exposing 2,966,709 records including email addresses, plaintext passwords, and homepage URLs from LeakBase 25Kk ULP by FobiBoom, an infostealer log compiled from infected devices and distributed on criminal forums.

Why the LeakBase 25Kk ULP Breach Is Dangerous

Nearly 3 million plaintext passwords combined with homepage URLs give attackers a ready-made toolkit for credential stuffing. The homepage URLs reveal exactly which websites each victim uses, allowing criminals to focus their automated login attempts on the services where stolen credentials are most likely to work, maximizing account takeover success.

What Was Exposed in the LeakBase 25Kk ULP Leak

• Email addresses
• Plaintext passwords
• Homepage URLs

Why This LeakBase 25Kk ULP Data Puts You at Risk

Plaintext passwords from stealer logs are immediately weaponized in credential stuffing attacks. If you reuse passwords, a single exposed credential can unlock your email, bank, and social media accounts. The homepage URLs in this dataset help attackers identify which services to target, increasing the risk for anyone whose data appeared in this log.

How Stealer Logs Work

Stealer logs are created by infostealer malware that infects victim devices through phishing emails, malicious downloads, or software vulnerabilities. Once installed, the malware silently harvests saved browser passwords, cookies, and form data before transmitting the stolen credentials to criminal operators. The logs are then compiled and sold or shared on underground forums for use in account takeover attacks.

Check If Your Data Was Exposed

HEROIC operates one of the world's largest breach databases, covering more than 400 billion leaked records. Use HEROIC's free breach scanner to check if your email address or credentials appeared in the LeakBase 25Kk ULP by FobiBoom leak or thousands of other breaches in our database.