If You Reuse Passwords, the LOGSYNC Leak of 75,482 Logins Matters

HEROIC analysts identified a stealer log uploaded to a public Telegram channel on May 28, 2025, tied to a source labeled LOGSYNC. The file exposed 75,482 compromised records from devices in the United States, including email addresses, plaintext passwords, and the URLs of the login pages the credentials belonged to.

Why This Is Dangerous

Every password in this log was captured and stored in plaintext, so there is nothing for an attacker to crack or decode. With 75,482 email and password pairs matched directly to specific login URLs, anyone who downloads this file can attempt to log straight into tens of thousands of accounts. If you reuse the same password across multiple sites, a leak like this one is exactly how a single stolen credential turns into access to your email, banking, or shopping accounts.

What Was Exposed

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

Why This Matters

A log of this size is exactly the kind of dataset attackers use for credential stuffing, where stolen email and password combinations are automatically tried across banking sites, email providers, and social platforms. Because these 75,482 passwords are already in plaintext, the only real barrier between an attacker and account takeover is whether the password was reused elsewhere. Once one account falls, identity theft and financial fraud often follow, since a compromised email inbox can be used to reset passwords on other services.

How This Stealer Log Was Created

Logs like this one, uploaded by a source tracked as LOGSYNC, come from information-stealing malware that infects a device through a cracked program, pirated download, or malicious link. Once running, the malware pulls saved usernames and passwords directly out of the browser, along with the exact URL of each site those credentials unlock, and compiles it all into a single file. That file is then shared on Telegram, where anyone in the channel can access it.

Check If You Are Affected

Stealer logs like this one are especially risky because the credentials inside are current and unencrypted, not old passwords that may already be outdated. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, including stealer logs like this LOGSYNC upload, so you can find out quickly whether your information was part of this exposure.