The MYR Leak Contains More Stolen Records Than Most People Realize

HEROIC analysts identified this stealer log on 02-Jan-2023. The breach exposed 476,570 records, with stolen data including email addresses, plaintext passwords, and URLs. The source is identified as MYR.

Why This Is Dangerous

With 476,570 plaintext email and password pairs now available to cybercriminals, the MYR breach gives attackers a large, immediately usable collection of stolen credentials. Every record contains a matching email address and password, meaning attackers can begin testing these logins against banking portals, email providers, and other services without any additional processing. The URLs included in the log identify exactly which sites each victim used, allowing for targeted account takeover attempts.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

Breaches of nearly half a million credentials are frequently used in large-scale credential stuffing campaigns. Automated tools test stolen login pairs across hundreds of websites simultaneously, and a single matching password can open the door to email, banking, shopping, and social media accounts. Victims who have not changed their passwords since January 2023 may still be vulnerable to attacks using data from the MYR breach.

How a Stealer Log Works

A stealer log is created when malware infects a computer and silently collects saved passwords, login URLs, and browser session cookies. This information is packaged into a file and distributed through private Telegram channels, where criminals use it to attempt account logins across multiple services. The MYR log is one of many such files circulating in underground communities.

Check If You Are Affected

HEROIC offers a free breach scanner that searches 400 billion records from known breaches. Search your email address now to find out if your credentials appear in this breach or others. The scan is free and takes seconds.