Dark Web Intel: LeakBase 10.5Kk ULP Dump Leaks 1.27M Passwords

HEROIC analysts identified a stealer log named "10,5Kk Url;Log:pass" circulating on a popular hacking forum on May 21, 2024. The listing claimed around 10.5 million lines of stolen data, which narrowed down to 1,273,649 unique records once duplicates were removed. Each record paired an email address with a plaintext password and the homepage URL where that login was used.

Why the LeakBase 10.5Kk ULP Dump Is Dangerous

These passwords were not encrypted or hashed in a protected database. They were captured in plaintext, straight from infected devices, meaning anyone who obtains this file can log in immediately without cracking anything. The homepage URL attached to each record shows an attacker exactly which site or service the login unlocks, effectively handing over a targeted map for account takeover.

What Was Exposed in the LeakBase 10.5Kk ULP Log

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

Why This Matters for Anyone Reusing Passwords

With 1.27 million working email and password pairs circulating on the dark web, attackers can run these credentials against banking sites, email providers, and shopping accounts in bulk, a tactic known as credential stuffing. Because many people reuse the same password across multiple accounts, one exposed login can quickly lead to account takeover, identity theft, and financial fraud on other services.

How a Stealer Log Like This One Gets Built

Stealer logs come from malware quietly installed on a victim's device, often hidden inside a cracked program, pirated software, or a malicious attachment. Once active, the malware pulls saved browser passwords, autofill data, and login sessions off the infected device, packages them into a file, and sends that file back to the attacker. That file is what eventually surfaces on hacking forums, exactly as happened with this 10.5Kk ULP log.

Check If You Are Affected

If you have reused a password across more than one account, it is worth checking whether your information is part of this leak. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including logs like this one, so you can find out in about a minute whether you need to change your passwords.