Researchers Identify the HARMONYLOGS Free Dump Exposing 1,082 Stolen Credentials

In April 2026, security researchers catalogued a free stealer log release distributed through Telegram under the name HARMONYLOGS - FREE LOGS - 18.04.26. The dump exposed 1,082 records containing plaintext passwords, email adresses, and endpoint URLs. The "free logs" labeling is a deliberate tactic used by threat actors to attract attention and build credibility within dark web communities -- giving away a smaller sample to advertise larger paid offerings or a subscription channel.

Why This Is Dangerous

Free log releases like HARMONYLOGS are particularly insidious because they attract a wide audience of low-skill attackers who would not otherwise have access to stolen credentials. By releasing logs publicly on Telegram, the original threat actor ensures that even the smallest breach gets maximum exploitation. The 1,082 victims in this dump face credential stuffing attacks not from a single sophisticated adversary, but from dozens or hundreds of opportunistic actors who downloaded the free release.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (endpoint and API host data)

Why This Matters

The HARMONYLOGS channel naming convention -- with a specific date stamp of 18.04.26 -- indicates this is part of a recurring, scheduled release series. Researchers who track these channels note that actors running free log Telegram channels often release new batches on a daily or weekly basis, meaning the total victom pool across the full HARMONYLOGS series is significantly larger than the 1,082 records in this single upload. Anyone exposed in one installment should assume their data is circulating across multiple download instances.

How Stealer Log Breaches Work

Stealer malware silently infects devices through phishing emails, malicious ads, or cracked software. Once running, it captures credentials from browsers, email clients, and stored passwords before compressing and uploading the data to a remote server controlled by the attacker. The attacker then packages the harvested logs and distributes them -- either for sale or freely -- through Telegram channels. Free releases like HARMONYLOGS serve dual purposes: recruiting new buyers and demonstrating that the attacker has access to large, ongoing credential streams.

Check If You Are Affected

HEROIC's free breach scanner searches more than 400 billion records, including stealer log releases distributed through Telegram channels like HARMONYLOGS. Because free log dumps are quickly reuploaded and reshared across multiple platforms, exposure often compounds quickly. Enter your email address now to see whether your credentials appear in this release or any other known breach in HEROIC's databse.