LeakBase 10M ULP Leak Gives Attackers 4.7M Ready-to-Use Logins

HEROIC analysts identified a stealer log named "Url:log:pass Fresh 5Gb" circulating on a popular hacking forum on May 28, 2024, shared by a user going by "miamiv." The file contained roughly 10 million lines of stolen data, which narrowed down to 4,772,775 unique records after 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 10M ULP Leak Is Dangerous

These are not encrypted or hashed passwords sitting in some locked database. They are plaintext credentials pulled straight from infected devices, meaning anyone who gets this file can log in with them immediately, no cracking required. The homepage URL attached to each record tells an attacker exactly which site or service the login unlocks, effectively handing them a ready-made map for account takeover.

What Was Exposed in the LeakBase 10M ULP Log

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

Why This Matters for Anyone Who Reuses Passwords

With 4.7 million working email and password pairs in circulation, attackers can run these credentials against banking sites, email providers, and shopping accounts in bulk, a tactic known as credential stuffing. Since most people reuse passwords across multiple accounts, one exposed login often opens the door to several others, leading to account takeover, identity theft, and financial fraud.

How a Stealer Log Like This One Gets Built

Stealer logs come from malware quietly installed on a victim's device, often disguised as a cracked program, a fake download, or a malicious attachment. Once active, the malware pulls saved passwords, autofill data, and login sessions straight out of the browser, packages them into a file, and sends that file back to the attacker. That file is what eventually surfaces on forums like the one where this log appeared.

Check If You Are Affected

If you have reused a password across more than one account, it is worth checking whether your information appears in 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 a minute whether you need to change your passwords.