UHQ Mix Combolist Leak Means 50,975 Accounts Are at Risk

HEROIC flagged a credential collection titled "53K UHQ Mix Combolist for All Sites" that was distributed on Telegram in January 2023. Containing 50,975 records with plaintext passwords covering a wide range of websites and services, this dump gives attackers a broad attack surface against users across the internet.

Why Plaintext Credentials Are So Dangerous

The 50,975 passwords in this combolist appear in plaintext, completely unprotected. There is no encryption layer to slow an attacker down. Each credential can be used immediately to attempt login on any service, and because this list covers "all sites" rather than targeting a single platform, the scope of potential damage is unusually wide. From email to banking to corporate accounts, every type of service is represented.

What Was Exposed

• Email Addresses — login identifiers spanning dozens of different service providers
• Plaintext Passwords — unencrypted credentials ready to be used in attacks
• URLs — a wide variety of website login pages where credentials were originally stolen

Cross-Site Credential Stuffing Amplifies the Threat

What makes this combolist particularly dangerous is its diversity. Because the credentials span many different types of websites, attackers can test each pair against multiple services simultaneously. Credential stuffing bots can cycle through the 50,975 entries against banking sites, email platforms, streaming services, and cloud storage in a matter of hours. A single reused password in this list could expose a victim's financial accounts, personal communications, and workplace systems all at once.

How Infostealers Build "All Sites" Combo Lists

Unlike breaches that target a single company, this type of dump is assembled from stealer logs—output files from infostealer malware running on thousands of individual devices. The malware harvests every credential saved in web browsers regardless of which site it belongs to, creating a comprehensive snapshot of a victim's entire online identity. These logs are then compiled, deduplicated, and labeled as "UHQ" (Ultra High Quality) to signal that the credentials are fresh and verified, making them highly valued on underground markets.

Check If Your Credentials Were Exposed

With 50,975 records covering credentials from all types of websites, anyone could be affected. Enter your email into HEROIC's breach scanner to search more than 400 billion compromised records from known data breaches and stealer log collections. If your credentials appear in the 53K UHQ Mix Combolist or any other exposure, you will know instantly and can secure your accounts before they are compromised.