How a Telegram Combolist Upload Exposed 662,665 Login Credentials

HEROIC analysts identified a large combolist named COMBOLIST 677K MIX FRESH VALID 100 that a Telegram user uploaded on January 8, 2026. Our records confirm 662,665 individual records of email addresses paired with plaintext passwords and the URLs of the sites they were taken from. That is fewer than the 677,000 the file name advertises, sellers often round up or pad these numbers to make a file look bigger than it actually is. Why This Is Dangerous: This file did not appear from nowhere. Someone gathered login pairs from multiple sources, ran them through a checker to confirm which ones still work, and packaged the survivors into a single 'fresh valid' file for resale or free distribution on Telegram. Every entry in it has already been tested and confirmed to log in. What Was Exposed: - Email addresses - Plaintext passwords - URLs linking each pair to its source site Why This Matters: With over 660,000 confirmed working logins in one file, this kind of combolist is exactly what powers large-scale credential stuffing campaigns. Attackers run these lists against banks, email providers, and shopping sites automatically, and any account that reuses a password is at risk of takeover, identity theft, or fraudulent purchases. How This Combolist Was Assembled: 'Mix' combolists like this one are typically stitched together from several smaller breaches and stealer logs, then run through validation tools that log into each site and discard any credentials that no longer work. What is left is labeled 'fresh' and 'valid' because it has been recently checked, which is exactly why files like this circulate quickly and get reused in new attacks. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including large combolists like this one, so you can find out in seconds if your credentials were part of this exposure and update your passwords before they're used against you.