HEROIC Analysts Found Mix TXTVALID in Private Telegram Channels

HEROIC analysts identified this stealer log on 17-Apr-2026. The breach exposed 1,980 records, with stolen data including email addresses, plaintext passwords, and URLs. The source is identified as Mix TXTVALID.

Why This Is Dangerous

The Mix TXTVALID label indicates that the credentials in this stealer log have been validated, meaning someone tested them and confirmed they still work. That makes this breach more immediately dangerous than an untested credential dump. Each of the 1,980 records in this breach is a confirmed active email and password pair that an attacker can use right now to log into accounts. Validated credential lists are sold at a premium in underground markets because they eliminate the guesswork from account takeover attacks.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs (the exact websites where credentials were used)

Why This Matters

Validated credential lists like Mix TXTVALID are among the most dangerous breach types because they represent credentials confirmed as still active at the time of validation. If your email and password appear in this dataset, it means an attacker already confirmed that combination works somewhere. The mix of sources in this breach means the affected accounts span a range of services, from social media to business platforms to e-commerce sites. Anyone in this list should change their password immediately on every site where that password is used.

How Stealer Logs Work

Stealer logs originate from malware that silently collects credentials from infected devices. The malware captures email addresses, plaintext passwords, and site URLs as users log in. After collection, some threat actors run the harvested credentials through automated tools to validate which ones still produce successful logins. The validated results, sometimes labeled VALID or TXTVALID, are then packaged and sold or distributed through private Telegram channels. HEROIC analysts monitor these channels to identify and index new breaches as they circulate.

Check If You Are Affected

HEROIC offers a free breach scanner that searches 400 billion records from known breaches. Search your email address now to find out if your credentials appear in this breach or others. The scan is free and takes seconds.