plesk uploaded by a Telegram User: HEROIC Finds 11,035 Leaked Logins

In February 2026, HEROIC analysts discovered a large stealer log labeled plesk, uploaded to a Telegram channel by an unnamed user. The file contained 11,035 records, each pairing an email address with a plaintext password and the URL of the login page it unlocks. Given the name, this collection appears to be focused on credentials tied to Plesk, a widely used web hosting control panel, gathered from a large number of devices already infected with password stealing malware.

Why This Is Dangerous

With 11,035 plaintext email and password pairs in a single file, this is one of the larger stealer logs HEROIC analysts have reviewed recently. Every record includes the exact login URL, meaning an attacker does not need to guess where a password applies, they can go straight to the site and attempt to sign in. Because these appear tied to hosting control panel access, a successful login could hand an attacker control over an entire website or server.

What Was Exposed

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

Why This Matters

A file of this size affects thousands of individual accounts at once. If any of these 11,035 passwords are reused elsewhere, attackers can run large-scale credential stuffing attempts against banking, email, or shopping platforms. If the credentials are genuinely tied to hosting panel access, the impact goes further, potentially giving an attacker the ability to modify websites, redirect traffic, or access other data stored on the same server.

How Stealer Logs Work

Stealer logs are generated by infostealer malware, which infects devices through channels like cracked software, fake downloads, or phishing attachments, then quietly harvests saved passwords, autofill entries, and session data from the browser. That information is sent back to whoever controls the malware and, at this scale, is often sorted by category, such as hosting panel logins, before being compiled into a file like this one and shared or sold on Telegram and dark web forums.

Check If You Are Affected

With over 11,000 records in this single file, checking your exposure is worth doing right away. HEROIC's free breach scanner searches a database of more than 400 billion breached records, including stealer logs like this one, so you can find out in seconds whether your email or hosting credentials were exposed.