30,203 Plaintext Passwords Were Just Dumped on Telegram

HEROIC analysts identified a stealer log file labeled "30K MIX MAILS" that was uploaded to a Telegram channel in May 2026. The dataset contains 30,203 compromised records harvested from infected devices, exposing email addresses, plaintext passwords, and associated URLs. The affected credentials are primarily tied to users in the United States.

Why Plaintext Passwords Put Every Account at Risk

Unlike hashed or encrypted credentials, the passwords in this dump are stored in plaintext, meaning they require zero effort to exploit. An attacker who obtains this file can immediately attempt logins across banking portals, email providers, and social media platforms without needing to crack anything first.

Plaintext exposure also means that any password patterns you use become visible. If you tend to add numbers to the end of a base word or swap letters for symbols in a predictable way, attackers can extrapolate those patterns to guess credentials on accounts not even included in this leak.

What Was Exposed in the 30K MIX MAILS Dump

• Email Addresses — Full login identifiers used across multiple services
• Plaintext Passwords — Completely unencrypted, ready for immediate misuse
• URLs — The specific websites and services where these credentials were entered

Why 30,203 Stolen Credentials Multiply the Damage

Credential stuffing attacks rely on volume. With over 30,000 email-password pairs, attackers can run automated tools that test each combination against dozens of popular services in minutes. Even a small success rate of 1-2% can yield hundreds of compromised accounts.

The inclusion of URLs makes this dataset especially dangerous. Attackers know exactly which services each credential belongs to and can prioritize high-value targets like financial institutions, corporate email systems, and cloud storage platforms.

Password reuse remains one of the most widespread security failures. Studies consistently show that over 60% of users recycle passwords across multiple services, meaning a single exposed credential from this dump could unlock several accounts belonging to the same person.

How Stealer Logs Harvest Credentials From Your Device

Stealer logs like this one are generated by infostealer malware, a category of malicious software designed to silently extract sensitive data from compromised computers. These programs typically arrive through phishing emails, pirated software downloads, or malicious browser extensions.

Once installed, the malware monitors browser activity and extracts saved passwords, autofill data, cookies, and session tokens. The stolen information is packaged into log files and sent to command-and-control servers, where it is sorted and sold or distributed on platforms like Telegram.

Because infostealers operate in the background, most victims have no idea their credentials have been captured until they discover unauthorized access to their accounts or find their data in a breach database.

Check If Your Credentials Were Exposed

If you have ever saved passwords in your browser or reused credentials across multiple websites, your data could be part of this or similar stealer log dumps. HEROIC provides a free breach scanner that checks your email against more than 400 billion compromised records.

Visit the HEROIC breach scanner to see if your credentials have appeared in known data exposures. If your information is found, change the affected passwords immediately, enable two-factor authentication wherever possible, and consider using a dedicated password manager to generate unique credentials for every account.