If You Reuse Passwords, the ’11’ Stealer Log Should Worry You

HEROIC analysts identified a stealer log file, labeled simply "11," uploaded to Telegram in April 2024. The file contained 262 records harvested from infected devices, including email addresses, plaintext passwords, and the web addresses those credentials were used on.

Why This Is Dangerous

If you reuse passwords across different accounts, this is exactly the kind of leak that should worry you. Stealer logs pull credentials directly from an infected computer, meaning the passwords in this file were captured the moment someone typed or saved them. There is no encryption standing between an attacker and your accounts.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs for the associated login pages

Why This Matters

Stealer log data is especially risky because it usually comes from a device that was actively infected with malware, not just a leaked database. That means the same infection may have captured other credentials beyond what appears in this specific file, and the victim likely has no idea their information was stolen at all. Reused passwords spread the damage further through credential stuffing, raising the risk of account takeover, identity theft, and financial fraud.

How Stealer Logs Work

A stealer log is generated by malware that infects a victim's device and quietly copies saved passwords, autofill data, and browser session information before sending it back to the attacker. Unlike a single company data breach, a stealer log can contain credentials for dozens of unrelated websites all pulled from one infected computer, which is why these files often get organized and shared under a generic label like "11" rather than a company name.

Check If You Are Affected

If any of your accounts show up in stealer log data like this, it means malware may have had direct access to your device at some point. HEROIC's free breach scanner checks your email against more than 400 billion leaked records to help you find out. Run a scan and change any passwords you recognize immediately.