How Malware Harvested 3,302,276 Logins in the URLLOGINPASS_4 Dump

Behind every giant credential dump is usually the same quiet culprit, infostealer malware sitting on someone's laptop, silently copying whatever it can find. The file known as URLLOGINPASS_4 is a perfect example of that process taken to a massive scale. Uploaded to Telegram on December 4th, 2025, this single dump contained 3,302,276 records, making it one of the larger stealer log releases HEROIC's dark web team has catalogued in recent weeks.

Why This Is Dangerous

A dump this size is not a random accident, it is the combined output of countless infected machines being funneled into one neccessary file for resale or free distribution. With over 3.3 million entries, criminals running automated tools can test stolen logins against hundreds of websites in minutes, a process known as credential stuffing. The sheer volume makes this dump especially attractive to low-effort attackers who just want quantity.

What Was Exposed

• 3,302,276 total leaked records
• Email Addresses
• Plaintext Password
• URLs showing which sites the logins belong to

Why This Matters

When passwords sit in plaintext like this, there is no scrambling or hashing to slow an attacker down, they can copy and paste directly into a login form. People who occasionally reuse the same password across banking, email, and shopping sites are at the highest risk here, since one leaked combo can unlock several accounts at once.

How Stealer Log Breaches Work

Infostealer malware usually sneaks onto a device through pirated software, a fake crack, or a phishing link disguised as an invoice or shipping notice. Once running, it grabs saved passwords straight from the browser, along with autofill fields and cookies, then bundles it all into a log wich gets uploaded somewhere like this. Multiple logs from different infected machines often get merged together into one giant file like URLLOGINPASS_4.

Check If You Are Affected

If any part of your digital life touches an email address that could be sitting inside those 3,302,276 records, it is worth checking sooner rather than later. HEROIC offers a free scanner covering more than 400 billion breached records, so you can search your email and find out imediately if you need to change a password.