What Is a Stealer Log? Mix Part2 4 Leak Exposes 79,045 Logins

In January 2023, a Telegram user uploaded a stealer log file called "Mix Part2 4," exposing 79,045 records of email addresses, plaintext passwords, and the URLs those logins belong to. It's a clear example of a breach type most people have never heard of, but that has become one of the most common ways credentials end up for sale online: the stealer log.

What Is a Stealer Log?

A stealer log is not a hacked database from a single website. It's a file built from malware that runs on someone's own computer, quietly collecting every password saved in the browser, along with the website each one unlocks. "Mix Part2 4" gets its name because it blends credentials from many different infected devices into one combined file, which is why it can contain tens of thousands of unrelated logins in a single upload.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the sites the credentials belong to

Why This Matters

Because the passwords in this file are plaintext and already matched to the exact site they open, there's no cracking or guessing required. Attackers can plug the 79,045 records straight into credential stuffing tools that test the same email and password against banking, email, and shopping sites. If your information is in this mix, the risk is direct account takeover, which can quickly lead to identity theft or financial fraud.

How Stealer Malware Ends Up on Your Device

Stealer malware usually arrives disguised as something ordinary, a cracked game, a fake software update, or a link in a phishing email. Once it runs, it copies saved browser passwords and sends them to the attacker without any obvious sign that anything happened. The attacker then bundles logs from many victims together, exactly like this "Mix" file, and shares or sells the result, in this case through a Telegram channel.

Check If You Are Affected

Because stealer logs like this one blend so many unrelated victims into one file, the only reliable way to know if you're in it is to check. HEROIC's free breach scanner searches a database of more than 400 billion breached and leaked records, including stealer logs, so you can quickly see whether your email or passwords are exposed and act before someone else does.