Dark Web Intel on the LeakBase 10Kk ULP by byzzzizz Credential Dump

On December 13, 2024, HEROIC's dark web monitoring detected the LeakBase 10Kk ULP by byzzzizz stealer log circulating on a prominent hacking forum. The raw file contains around 10 million lines and deduplicates to 1,105,578 unique records, each pairing an email address with a plaintext password and the homepage URL where the credential was captured.

Why This Stealer Log Is Dangerous

The "10Kk Free" naming convention signals that byzzzizz uploaded this as a free sample to advertise larger paid drops. Free stealer logs get downloaded by the widest possible criminal audience, which maximizes the speed of exploitation. Within hours of posting, thousands of attackers begin credential stuffing with the exact same file.

What Was Exposed in LeakBase 10Kk ULP by byzzzizz

• Email addresses
• Plaintext passwords
• Homepage URLs tied to each login

Why This Matters

Dark web intelligence like this exists because threat actors routinely post free samples to build reputation on forums such as LeakBase and BreachForums. HEROIC catalogs these drops the moment they appear so victims can respond before the first credential-stuffing wave hits. Anyone whose saved browser password was captured in a previous infostealer infection is likely included somewhere in this dataset.

How Stealer Log Breaches Work

Infostealer malware like RedLine, Lumma, Vidar, and StealC lands on victim devices through cracked software, pirated games, malicious ads, and phishing attachments. Once running, it scrapes saved browser passwords, cookies, autofill data, and crypto wallet files, then uploads the log to the attacker's server. Operators like byzzzizz bundle thousands of logs into drops advertised on underground forums.

Check If You Are Affected

HEROIC monitors over 400 billion compromised records across stealer logs, breaches, and dark web leaks. Run a free scan to check if your email appears in the LeakBase 10Kk ULP by byzzzizz stealer log, and receive clear remediation steps.