Inside Good Emails Mix Stealer Logs: 3,708 Passwords Harvested

In December 2024, HEROIC discovered a stealer log file named "Good Emails.txt_Mix" being shared on Telegram. This mixed credential dump contains 3,708 records extracted from infected devices by infostealer malware. Each record includes a plaintext password, the associated email address, and the URL of the service where it was stolen — giving attackers a complete toolkit for account compromise.

What Makes Plaintext Passwords So Exploitable

The passwords in Good Emails.txt_Mix are stored in their original, unencrypted form. There is no cryptographic barrier between the attacker and the credential. Unlike password hashes that require brute-force cracking, these plaintext strings can be used directly in login attempts. For all 3,708 affected accounts, the time from file download to unauthorized access is measured in seconds, not hours.

What Was Exposed

• Email Addresses — a mixed collection spanning multiple email providers and domains
• Plaintext Passwords — stored in cleartext without hashing, salting, or encryption
• URLs — the target sites and services from which each credential was captured by the malware

Credential Stuffing at Scale

A "mix" file like this one is especially valuable to attackers because it covers credentials from many different services. Rather than targeting a single platform, cybercriminals can feed the entire 3,708-record set into automated stuffing tools and test each pair against banking, email, streaming, and e-commerce sites simultaneously. Because the file already includes the source URLs, attackers know exactly which services to hit first for guaranteed logins.

The Technical Anatomy of a Stealer Log

Stealer logs are produced by infostealer malware families such as RedLine, Vidar, Stealc, and Raccoon. When a victim unknowingly installs the malware — often bundled with cracked software, fake updates, or phishing attachments — it immediately begins extracting data from the browser's credential store. The malware reads SQLite databases and decrypts locally stored passwords using the operating system's DPAPI keys. It then formats the stolen credentials into structured log files, uploads them to a command-and-control server, and threat actors later distribute curated selections like Good Emails.txt_Mix on Telegram.

Check If Your Credentials Were Exposed

Mixed credential dumps like this one pull from a wide variety of sources, increasing the odds that any given user could be affected. Use HEROIC's data breach scanner to search through more than 400 billion compromised records and find out if your email or password appears in this or any other known leak. Identifying exposure early gives you the chance to reset passwords and secure your accounts before attackers act.