Inside Logs_29 May: How Stealer Malware Took 16,565 Passwords

HEROIC analysts found a stealer log titled "Logs_29 May" that a Telegram user uploaded on May 29, 2025. The file contained 16,565 records tied to United States based accounts, including email addresses, plaintext passwords, and the URLs of the login pages those credentials belonged to.

Why This Is Dangerous

The passwords in this file were stored and exposed in plaintext, meaning there is no encryption standing between an attacker and a working login. With the matching URL included for each account, anyone who downloads this log can see exactly which service a credential unlocks and try it immediately. Logs like this one spread fast once they hit public Telegram channels, so the risk to affected users starts the moment the file is posted.

What Was Exposed in the Logs_29 May Leak

• Email addresses
• Plaintext passwords
• URLs of the associated login accounts

Why This Matters for the 16,565 Affected Accounts

An email, password, and login URL bundled together gives an attacker everything needed to attempt account takeover with no guesswork. If anyone in this group of 16,565 reused their password elsewhere, the same combination can be tested against banking, email, and shopping accounts within minutes through automated credential stuffing tools. From there, the path runs directly to identity theft and financial fraud, since a compromised email account is often the key to resetting passwords on everything else tied to it.

Inside a Stealer Log: How Malware Harvested These Passwords

A stealer log is the output of malware that quietly infects a device and collects whatever login data it can find there, typically credentials saved in a browser, autofill entries, and active session data. The infected machine sends this haul back to the attacker, who compiles it into a dated file like the one uploaded here. From there it gets dropped into Telegram channels or dark web forums, sometimes given away to build a reputation, sometimes sold. Because the theft happens on the victim's own device rather than through a breach of a company's servers, a single stealer log can expose credentials for dozens of unrelated sites at once.

Check If You Are Affected

If you are based in the United States, or think you may have had credentials swept up in a stealer log campaign around late May 2025, checking your exposure now is worth doing. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including stealer log dumps like this one, to tell you whether your email address has surfaced in a known breach. If it has, changing the affected password immediately, and any other account where you reused it, is the fastest way to shut down the access an attacker would otherwise have.