Someone Has Your Password: 20,595 Credentials Leaked

HEROIC discovered a stealer log collection labeled 21k UHQ Combolist For Mixed, distributed through Telegram in January 2023. This dump contains 20,595 records spanning multiple email providers, with each record exposing an email address, a plaintext password, and the URL of the compromised service. The "UHQ" label signals that these credentials were verified as working at the time of release, increasing the urgency for anyone whose data may be included.

Your Passwords Are Exposed in Readable Text

The credentials in this combolist are stored as plaintext — no hashing, no encryption, no barriers of any kind. If your email and password appear in this file, an attacker can use them immediately. There is no decryption step, no brute-force process. The password you chose to protect your account is sitting in a downloadable text file, visible to anyone who wants it.

What Was Exposed

• Email addresses from multiple providers including Hotmail, Yahoo, Gmail, and others
• Plaintext passwords that have been verified as functional
• URLs identifying the services and websites where each credential was captured

Why One Leaked Password Can Ruin Everything

The mixed nature of this combolist makes credential stuffing particularly effective. With email-password pairs spanning multiple providers, attackers can target a wide range of platforms in a single automated run. They feed the 20,595 credential pairs into stuffing tools that test them against banks, email services, social media, cloud storage, and enterprise systems. If you reuse your password — as the majority of internet users do — one match can open the door to every account tied to that password.

The Infostealer Pipeline That Built This List

This combolist was compiled from infostealer malware output. Malware families like RedLine, Raccoon, and Vidar infect devices through phishing campaigns, malicious advertisements, and fake software downloads. They silently extract credentials from browser password managers, capture form data, and record authentication tokens. The raw output is then filtered, validated, and organized into "UHQ" collections — premium datasets that criminal buyers trust to contain working credentials ready for immediate exploitation.

Check If Your Credentials Were Exposed

With over 20,000 verified credentials in circulation, the chances of your data appearing in this combolist are real. HEROIC's breach scanner searches across more than 400 billion compromised records from data breaches and stealer log collections globally. Enter your email address to see if it appears in the 21k UHQ Combolist or any other known breach, then immediately change any exposed passwords and activate multi-factor authentication across all your accounts.