How a Telegram-Uploaded ULP Stealer Log Exposed 2.38M Logins

On October 25, 2025, a file simply labeled "ulps" surfaced in a Telegram channel, dropped there by a user who may not have realized just how much damage it could cause. Inside were 2,381,648 individual login records, each one pairing a website URL with an email address and a plaintext password. This kind of file is known in security circles as a ULP dump, and it's exactly the raw material that fuels large scale credential stuffing attacks across the web.

Why This Is Dangerous

What makes this leak so concerning isn't just the size, it's the format. Because every password sits in plaintext, right next to the exact URL where it was used, anyone who gets their hands on this file doesn't need to guess or crack anything. They can copy and paste the credentials straight into the matching login page and get in. This kind of exposure occured because malware was sitting quietly on infected devices, scooping up whatever was typed or saved in a browser.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs tied to each set of login credentials

Why This Matters

With 2,381,648 records in circulation, the odds that your information is somewhere in this file are higher than most people would like to admit. Because the passwords are stored in plaintext, there's no encryption standing between an attacker and your account. If you reuse passwords across multiple sites, wich a lot of people do without thinking twice, one leaked login can quickly turn into several compromised accounts.

How Stealer Logs Work

A stealer log comes from info-stealing malware that gets installed on a victim's computer, often through a fake download, a cracked piece of software, or a malicious email attachment. Once it's running, the malware quietly grabs saved browser passwords, autofill data, and even session cookies, then bundles everything into a file and sends it back to whoever controls the malware. That file eventually gets sold, traded, or in this case just uploaded to Telegram for anyone to grab for free.

Check If You Are Affected

You shouldn't asume your accounts are safe just because you haven't noticed anything unusual yet. HEROIC scans more than 400 billion (400B+) leaked records, including stealer logs just like this one, so you can immediately check whether your email address shows up in a breach. Run a free scan today and take action before someone else uses your own login against you.