The LOGSYNC OLDCloudFree Leak Exposed 43,946 US Accounts

HEROIC found the LOGSYNC OLDCloudFree breach on June 13, 2025. The incident exposed 43,946 records containing email addresses, plaintext passwords, and URLs from endpoints infected by infostealer malware and uploaded to Telegram by a user operating as LOGSYNC.

Why the LOGSYNC OLDCloudFree Breach Is Dangerous

With 43,946 sets of plaintext credentials now circulating on Telegram and dark web channels, attackers can launch automated login attacks against banking sites, email providers, and cloud services immediately. The scale of this leak means victims may already have compromised accounts they are unaware of, and the passwords remain dangerous as long as they have not been changed.

What Was Exposed in the LOGSYNC OLDCloudFree Leak

• Email addresses
• Plaintext passwords
• URLs

Why This LOGSYNC OLDCloudFree Data Puts You at Risk

Attackers use credential stuffing software to test stolen email and password combinations against thousands of websites automatically. A single working pair can unlock your primary email account, which gives access to password reset links for banking, investment, and healthcare portals. Identity theft and financial fraud often follow within hours of a successful account takeover.

How Stealer Log Breaches Work

Stealer log malware, also called infostealers, are installed on a victim's device through phishing emails, malicious downloads, or compromised software. Once active, the malware silently harvests saved browser credentials, session cookies, and form-fill data, then uploads the collected records to an attacker-controlled server. The assembled logs are then packaged and published on dark web forums and messaging platforms like Telegram.

Check If Your Data Was Exposed

HEROIC operates one of the world's largest breach databases, covering more than 400 billion leaked records. Use HEROIC's free breach scanner to check if your email address or credentials appeared in the LOGSYNC OLDCloudFree leak or thousands of other breaches in our database.