Inside the CuckooLogsPublic Log: How Malware Harvested 6,658 Passwords

HEROIC analysts identified a stealer log file called CuckooLogsPublic that was uploaded to a public Telegram channel on June 10, 2025. The file contains 6,658 records taken from infected devices, including email addresses, plaintext passwords, and the URLs of the accounts and services those passwords open. Because the data was harvested directly from compromised browsers rather than a hacked company database, every credential inside reflects a real, working login at the time it was collected.

Why the CuckooLogsPublic Leak Is Dangerous

Every password in this log is stored in plaintext, so there is no encryption standing between an attacker and the account it protects. Paired with the URL for each entry, the log tells an attacker exactly which site or service a stolen login opens, removing the guesswork that would normally slow down an account takeover attempt.

What Was Exposed in the CuckooLogsPublic Log

• Email addresses
• Plaintext passwords
• URLs identifying the exact site or service tied to each login

Why 6,658 Harvested Passwords Still Matter

A working email and password pair does not need to belong to a massive breach to cause harm. Attackers commonly load logs like this one into automated credential stuffing tools, testing each login against banking sites, email providers, and shopping platforms within minutes. Anyone who reused one of these passwords elsewhere faces a genuine risk of account takeover, along with the identity theft and financial fraud that often follow.

Inside CuckooLogsPublic: How Malware Harvested These Passwords

A stealer log like this one starts with malware quietly installed on a victim's device, often through a cracked software download, a fake update, or a malicious attachment. Once running, the malware scans the browser for every saved login and copies the email, password, and web address for each one it finds. That stolen information is sent back to whoever controls the malware, who packages it into a log file, exactly like the one named CuckooLogsPublic, and distributes or sells it through channels such as Telegram.

Check If Your Email Is in the CuckooLogsPublic Leak

If you want to know whether your email address turned up in this leak or any other, HEROIC's free breach scanner checks it against a database of more than 400 billion leaked records. Run a free scan now and change any passwords you have reused across multiple accounts.