HEROIC Discovers Mansory 3 Stealer Log With 9.5M Passwords

HEROIC analysts discovered a large stealer log dump, labeled "Mansory 3," posted to a Telegram channel on May 21, 2026. The file is one of the bigger ones in this series, containing 9,471,599 records gathered from infected devices, including email addresses, plaintext passwords, and the URLs of the accounts those credentials unlock. A file of this size typically comes from a widespread malware campaign rather than a single infected computer, meaning the credentials inside likely belong to victims scattered across many different websites and services.

Why This Is Dangerous

Every password in this dump was harvested in plaintext, straight from victims' saved browser data, so there is nothing for an attacker to crack or figure out. Each record already links an email, a password, and the exact site it belongs to, which means anyone who downloads this file can immediately start attempting logins on real accounts. At nearly 9.5 million records, this log gives attackers enormous scale, letting them run automated login attempts across a huge number of stolen credentials at once.

What Was Exposed

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

Why This Matters

Password reuse is what turns a file like this into real-world harm. If any of the 9,471,599 people represented in this log reused a password across multiple accounts, attackers can launch credential stuffing attacks, feeding the same login into banking sites, email providers, and shopping platforms to see which ones accept it. A successful match can lead directly to account takeover, financial fraud, or identity theft, especially since the included URLs tell attackers exactly where to aim each stolen credential.

How Stealer Logs Work

Stealer logs are generated by infostealer malware, a category of malicious software that infects a device, often through pirated downloads, fake installers, or malicious attachments, and then quietly extracts saved passwords, autofill data, and browsing history. Once the malware finishes collecting, the stolen data is bundled into a log file and distributed, often through Telegram channels dedicated to buying and selling this kind of data. Large logs like Mansory 3 are usually the product of the malware spreading across many machines over time, with each new infection adding its own set of saved credentials to the file.

Check If You Are Affected

If you want to know whether your email or passwords appear in 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. A quick search takes only a minute and can help you catch an exposed password before someone else uses it against you.