4,010 Passwords From the 4k CORP FULL VALID Combolist Just Leaked

HEROIC analysts identified a combolist titled 4k CORP FULL VALID that a Telegram user uploaded on 21-Apr-2025. The file contains 4,010 records pairing email addresses with plaintext passwords, along with associated URLs, tied largely to accounts in the United States. | WHY THIS IS DANGEROUS: Because the passwords in this file are stored in plaintext, anyone who obtains the list can use the credentials immediately, no cracking required. Paired with the URLs included in the leak, an attacker can go straight to the login page a victim actually uses and try the exact email and password on file. | WHAT WAS EXPOSED: Email addresses; plaintext passwords; associated URLs showing which sites the credentials belong to. | WHY THIS MATTERS: Even a combolist of a few thousand entries causes real damage. Attackers run these credential sets through automated tools that test the same email and password combination across banking sites, email providers, and social media, a technique called credential stuffing. If any of these 4,010 people reused a password elsewhere, those other accounts are now at risk of takeover. | HOW COMBOLISTS WORK: A combolist is a compiled file of email and password pairs, often assembled from multiple smaller breaches or stolen-credential sources and repackaged for resale or free distribution on Telegram and dark web forums. That mixed origin makes it harder to trace to one source but no less dangerous, since the credentials inside are often still active. | CHECK IF YOU ARE AFFECTED: If you think your email could be part of this or any other leaked dataset, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. Run a free scan to see if your credentials have been exposed and what to change right away.