The ZSU-Labeled Leak Exposed More Logins Than a Small High School

HEROIC analysts identified a combolist labeled "zsu" after it was uploaded to a Telegram channel. The underlying data dates to August 18, 2023, and the file contains 1,287 records, each pairing an email address with a plaintext password and the URL of the site the login belongs to, a small but real set of exposed accounts.

Why the ZSU-Labeled Leak Is Dangerous

Every one of the 1,287 records in this file is a working login, not a partial or encrypted fragment. Because the passwords are stored in plaintext and each entry already names the site it unlocks, an attacker can start testing accounts immediately without needing to crack anything first.

What Was Exposed in This Leak

• Email addresses
• Plaintext passwords
• URLs identifying the associated website for each login

Why This Matters for the 1,287 Accounts Involved

More logins were exposed here than you would find in a small high school, each tied to a real email address and password. If any of these passwords were reused elsewhere, attackers can use that overlap to break into email, banking, or social media accounts, turning one leaked credential into a much bigger problem for the person affected.

How a Combolist Like This Stays in Circulation

Combolists are built by pulling email and password pairs from breaches, phishing pages, or malware infections, then organizing them by the website each one unlocks. A dataset from 2023 still surfacing now shows how long stolen credentials can sit in Telegram channels and private forums before being reshared, sometimes years after the original breach occurred.

Check If You Are Affected by This Breach

If your email address is among the 1,287 records in this file, your password may already be exposed. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including this one, so you can confirm your exposure and change any reused passwords right away.