HEROIC Analysts Uncover Centurion Leak of 13,878,334 Records

HEROIC analysts flagged a massive file circulating on Telegram in May 2026 called Centurion.txt, and after digging through it, the scale became clear: 13,878,334 records of email addresses, plaintext passwords, and the URLs they belonged to, all sitting in one single stealer log dump.

Why This Is Dangerous

A file this size isn't the work of one infected laptop, it's the combined result of malware running across a huge number of devices over time, all funneled into a single collection. With 13,878,334 records inside, Centurion.txt is one of those leaks wich touches an enormous number of people at once, many of whom have probably never heard of the file that now contains their login.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs for each account
• 13,878,334 records total

Why This Matters

Because the passwords in Centurion.txt are stored in plaintext, there's nothing standing between the data and anyone who opens the file. At this scale, automated tools can test millions of these combinations against popular websites in a short amount of time, which is exactly why size matters so much here, it's not just about your account, its about how efficiently criminals can work through all 13,878,334 of them.

How Stealer Logs Work

Stealer malware infects devices quietly, often through pirated software or malicious downloads, then harvests every saved password, cookie, and autofill entry it can find in the browser. Those individual harvests get combined over time into massive combined files like Centurion.txt, which then circulate on Telegram and dark web forums as a single, giant resource for anyone looking for working logins.

Check If You Are Affected

Given the size of this one, it's worth checking directly rather than assuming you're not affected. HEROIC's free breach scanner searches more than 400 billion exposed records, including large stealer log dumps like Centurion.txt, so you can find out imediately and change any passwords that show up.