Everyday Users Targeted: LOGSYNC CuckooLogsPublic Leak Hits 5,302

HEROIC analysts identified a stealer log file uploaded to a public Telegram channel on May 27, 2025, under the name CuckooLogsPublic-20250527, posted by an account operating as LOGSYNC. The file contained 5,302 records made up of email addresses, plaintext passwords, and the URLs of the login pages those credentials belong to.

Why This Is Dangerous for Everyday Account Holders

The people in this file were not chosen because they work at a specific company or hold a particular job. Stealer logs like this one collect whatever an infected device had saved, which means everyday email, shopping, banking, and social media logins end up mixed together in one file. Because the passwords are stored in plaintext and matched to their exact login URL, anyone who gets hold of this log can sign in to those accounts immediately without cracking anything.

What Was Exposed in the CuckooLogsPublic-20250527 Upload

• Email addresses
• Plaintext passwords
• URLs of the affected login pages

Why This Matters for the 5,302 People Affected

A leak like this feeds directly into credential stuffing, where attackers automatically try the same email and password pair across many other sites. If any of the 5,302 people in this file reused a password, an attacker could take over additional accounts beyond the one originally compromised. Combined with a valid email address, this data also makes phishing messages far more convincing and opens the door to identity theft.

How a Stealer Log Like This One Gets Made

Stealer logs are produced by malware that infects a device through a malicious download, cracked software, or a phishing link, then quietly copies the passwords and site data saved in the victim's browser. That harvested information gets bundled into a log file and posted or sold, often through Telegram accounts like the one behind this LOGSYNC upload. Because the data is taken directly from the browser, the passwords collected are typically the ones the victim was actively using at the time of infection.

Check If You Are Affected

If you want to know whether your email or passwords have turned up in a stealer log like this one, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. A scan takes seconds and shows you exactly where your data has surfaced so you can update any exposed or reused passwords right away.