How a Telegram Upload Led to 6,104 Stolen Mail Access Logins

HEROIC analysts identified a Telegram file called "MAIL ACCESS 6K MIX VALID 100" that surfaced on August 21, 2025. The name suggests a mixed batch of roughly 6,000 validated logins, and the file did in fact contain 6,104 records of email addresses, plaintext passwords, and account URLs. Why This Is Dangerous: The "valid" label in the file name points to credentials that were tested and confirmed working before being shared, which makes this list more immediately dangerous than an unverified dump. Combined with plaintext passwords, the 6,104 accounts inside are ready to use right away. What Was Exposed: - Email addresses - Plaintext passwords - Account URLs Why This Matters: Validated login lists move quickly through criminal channels because buyers know the credentials still work. Anyone in this batch who reused their password elsewhere faces an immediate risk of account takeover, and the accompanying URLs make it easy for attackers to go straight to the right login page. How a Validated Telegram Combolist Like This Works: Attackers often run stolen credentials through automated checking tools first, discarding logins that no longer work and keeping only the confirmed, or "valid," ones, then bundle and label them for resale or wider distribution on Telegram. This validation step, referenced by "MIX VALID 100" in the file name, is what turns a raw list into a more dangerous, ready-to-use product. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including validated combolists like this one. Run a free scan to see if your login was part of this leak.