Someone Has Your Password: 5,542,283 Mansory 4 Credentials Leaked

HEROIC discovered a massive stealer log archive labeled Mansory 4 on Telegram in January 2026. This is one of the largest individual credential dumps HEROIC has cataloged, containing 5,542,283 records. Each entry includes an email address, a plaintext password, and the URL of the service the victim was using when infostealer malware captured their login credentials.

5.5 Million Plaintext Passwords Now Circulating Freely

Every one of the 5,542,283 passwords in this dataset is stored in plaintext, readable by anyone who downloads the file. At this extraordinary scale, the leak affects millions of individuals worldwide. Attackers do not need any special tools or skills to use these passwords. They are ready-made keys to accounts across every major online service, and the sheer volume guarantees a high hit rate even with conservative credential stuffing attempts.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (millions of login endpoints across countless services)

At This Scale, Credential Stuffing Becomes Industrial

With 5,542,283 credential pairs, this is not a small-time operation. Threat actors use datasets of this size to fuel industrial-scale credential stuffing attacks, distributing login attempts across vast botnets that can test millions of combinations per day. Email accounts, banking portals, cryptocurrency exchanges, healthcare systems, and corporate networks are all targeted simultaneously. Even a one percent success rate would compromise over 55,000 accounts, each potentially containing financial data, personal information, or access to connected systems.

The Mansory Stealer Log Series

The Mansory 4 label indicates this is the fourth volume in an ongoing stealer log distribution series. Infostealer malware families like RedLine, Lumma, and Raccoon generate these datasets by infecting devices through malvertising campaigns, pirated software, and phishing emails. Each infected device contributes credentials for every service the victim has ever saved in their browser. The Mansory operation aggregates these individual logs into massive volumes, creating comprehensive credential databases that are among the most dangerous resources available to cybercriminals.

Check If Your Credentials Were Exposed

With over 5.5 million records, the Mansory 4 dataset has a wide blast radius. HEROIC's breach scanner indexes more than 400 billion compromised records and includes this dataset. Search your email address immediately to find out if your credentials are part of this leak. If they are, change your passwords across all affected services right away and activate two-factor authentication everywhere it is available.