ULP Private Lines 4 TG ArhontCorp Combolist Exposes 16.9M Logins

HEROIC analysts tracked a massive combolist called ULP Private Lines 4 TG ArhontCorp, uploaded to Telegram on 28-Aug-2026. The file contains 16,904,931 records, each combining an email address with a plaintext password and a URL. Because the file is this large and fully readable, it is worth taking a moment to scan your email and see whether you are included.

What Nearly 17 Million Logins Means in Practice

A combolist this size is built for speed. Attackers load lists like this into automated tools that test every entry against a target service in minutes, which is why a single large file can affect accounts on many different platforms at once, far beyond wherever the credentials were first collected.

The Login Data Exposed in ULP Private Lines 4 TG ArhontCorp

• Email Addresses
• Plaintext Password
• URLs

Why This Kind of Scale Multiplies the Risk

With more than 16 million entries, the odds that any individual password has been reused somewhere else are high. Each match found during automated testing gives an attacker a working account they can exploit directly or sell on, which is how one combolist can lead to damage across many unrelated services.

How Combolists Like This Are Put Together

Combolists are not usually the result of one single breach. They are typically compiled from many separate sources, including older leaks and stealer logs, then cleaned, deduplicated, and merged into one large file so it can be reused efficiently for credential stuffing. That merging process is also why a single combolist can end up containing credentials tied to many unrelated breaches from different points in time.

Find Out If Your Credentials Are Included

Scan your email against this file and HEROIC's full breach database. If your details come up, change that password everywhere you have used it, since a list this size touches personal inboxes and work accounts alike.