Mansory 12 Telegram Stealer Log: See If Your Passwords Leaked

HEROIC analysts identified a stealer log dump, referred to by its uploader as "Mansory 12," posted to a Telegram channel on December 9, 2025. The file contains 1,276,545 records harvested from infected computers, including email addresses, plaintext passwords, and the URLs of the websites those credentials were used on. Unlike a traditional corporate breach, this data was not stolen from a single company's servers. It was collected directly from victims' devices by malware designed to siphon saved login information, then bundled and shared for anyone to download.

Why This Is Dangerous

Because every password in this file was captured in plaintext, straight from a victim's browser or saved credentials, an attacker does not need to crack or guess anything. Each record already pairs an email address with the exact password used, and the associated URL, which means a criminal can log directly into whatever account that credential belongs to, whether it is email, banking, social media, or a work account. This kind of ready-to-use data is especially valuable to attackers because it removes almost all of the effort typically required to break into an account.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the websites where the credentials were used

Why This Matters

Reused passwords are the biggest risk here. If any of the 1.27 million people in this file used the same email and password combination on other websites, attackers can attempt credential stuffing, automatically trying the same login across banking, shopping, and social media sites. Because the URLs are included, criminals also know exactly which service each password unlocks, making account takeover faster and more targeted than in a typical leaked password list.

How Stealer Logs Work

Stealer logs come from a type of malware called an infostealer, which infects a computer, often through a pirated download, fake software update, or malicious email attachment, and then quietly scans the device for saved passwords, browser autofill data, and login sessions. Once collected, this information is packaged into a "log" and sold or shared, frequently through Telegram channels like the one this file was posted to. Because the malware pulls credentials directly from the victim's machine rather than a company database, stealer logs often include working, unhashed passwords, which is exactly why this file is so risky for the people in it.

Check If You Are Affected

If you think your email or passwords could be part of this stealer log, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records, including stealer logs like this one. Running a quick search takes only a moment and can tell you whether it is time to change your passwords before someone else uses them first.