Mix 3.16 Stealer Log Spans Industries: 98,487 Records Leaked

In January 2023, HEROIC analysts uncovered a stealer log named "mix 3.16" that had been uploaded to Telegram by an anonymous user. The file contained 98,487 records, including email addresses, plaintext passwords, and the URLs of the websites those logins were used on. Unlike leaks tied to a single company, this "mix" file pulled credentials from many different sites and services, meaning the people affected weren't customers of just one platform.

Why This Mixed Stealer Log Is Dangerous

Because this log spans many different websites and industries at once, from email providers to shopping sites to who knows what else, attackers holding this file can attack across sectors simultaneously. Instead of focusing on one company's customers, whoever bought or downloaded this file has 98,487 ready-to-use logins spread across a wide range of online services, making it valuable to almost any kind of criminal, from spammers to fraudsters.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the associated login sites

Why This Matters

Because the passwords in this file are stored in plaintext and already matched to specific login pages, attackers can use them immediately without cracking anything. Anyone included in this leak who reused a password across multiple accounts faces a heightened risk of credential stuffing, where the same email and password are tried against banking sites, email providers, and social media until one works.

How Stealer Logs Work

Stealer logs are generated by malware that infects a device and quietly gathers everything saved in the browser: usernames, passwords, autofill data, and the web addresses they belong to. Because the malware collects whatever the victim happened to have saved, a single infected device can produce logins spanning dozens of unrelated websites and industries, which is exactly why "mix" files like this one exist.

Check If You Are Affected

With nearly 100,000 records in this leak, there's a meaningful chance your information is included. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including stealer logs like this one, so you can find out instantly and update any passwords you may have reused.