18,381 Logins Leaked in CuckooLogs Dump, Like a Packed Arena

Picture a mid-size high school auditorium packed wall to wall, then double it. That's roughly the scale of CuckooLogsPublic-20250925, a stealer log file uploaded to a Telegram channel in September 2025 that HEROIC's team confirmed contains 18,381 exposed login records.

Why This Is Dangerous

Every one of those 18,381 records pairs an email address with a plaintext password and the exact web address it belongs to. There's no puzzle for a criminal to solve here, the credentials are handed over ready to use, which means the window between the file being posted and someone's account getting hijacked can be a matter of minutes.

What Was Exposed

• Email addresses collected from infected devices
• Plaintext passwords stored in readable form
• URLs matching each login to its target site
• 18,381 total records inside the CuckooLogsPublic-20250925 file

Why This Matters

When a dump this large starts circulating, it seperates into smaller pieces fast, traded, resold, and copy-pasted across forums until its nearly impossible to trace where it originally came from. That spread makes cleanup harder for victims because the same stolen password can keep resurfacing in new lists for years.

How Stealer Logs Work

A file like CuckooLogsPublic-20250925 begins with infostealer malware landing on someone's computer, often bundled inside a cracked download or a fake update prompt. Once active, it scrapes the browser's stored passwords, autofill entries, and session cookies, then quietly transmits them to a remote server. The stolen batch gets cleaned up, labeled, and released publicly, exactly the pattern seen with this Telegram upload.

Check If You Are Affected

With a leak of this size, there's a real chance your information is sitting in a file just like this one right now. HEROIC's free breach scanner searches a database of more than 400 billion compromised records, letting you check your email in seconds and see what, if anything, needs to change.