HARMONYLOGS Stealer Log Breach: 6,188 Credentials Leaked to Telegram

HEROIC found the HARMONYLOGS stealer log on 29-Apr-2026, a file exposing 6,188 records containing email addresses, plaintext passwords, and the URLs of services where those credentials were harvested from compromised devices. The file was uploaded to Telegram as part of a freely distributed collection of stolen credentials.

Why the HARMONYLOGS Breach Is Dangerous

With email addresses, plaintext passwords, and associated URLs all in one file, attackers can immediately attempt credential stuffing across banking, shopping, and email platforms. The plaintext format eliminates any cracking effort, making account takeover nearly instant for organized threat actors.

What Was Exposed in the HARMONYLOGS Leak

• Email addresses
• Plaintext passwords
• URLs (the exact services where credentials were captured from infected devices)

Why This HARMONYLOGS Data Puts You at Risk

Credential stuffing, account takeover, identity theft, and financial fraud are all immediate risks when email-password pairs are exposed in plaintext. Attackers can automate login attempts across hundreds of services using freely available tools, and victims often remain unaware until damage is done.

How Stealer Log Works

Infostealer malware is typically distributed through phishing emails, malicious downloads, or compromised software. Once installed, it silently harvests saved credentials from browsers and applications before transmitting them to attacker-controlled servers. The stolen data is then compiled into logs and distributed through underground channels, including 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 HARMONYLOGS leak or thousands of other breaches in our database.