The WaterCloud Stealer Log Exposed 7,208 Stolen Login Credentials

In August 2026, HEROIC analysts found a stealer log file labeled "WATERCLOUD 3" shared by a Telegram user operating under the handle ArhontCorp. The file contained 7,208 records pulled from infected devices, including email addresses, plaintext passwords, and the URLs of the sites those logins were used on. It's a smaller log than some of the dumps circulating on the same channels, but the data inside is just as usable to an attacker.

Why a Small Stealer Log Still Poses Real Risk

A smaller record count doesn't mean smaller danger for the people in it. Because this data was pulled directly from infected devices rather than an old company database, the credentials were likely saved and actively in use at the time of infection. Each entry also comes with the exact site URL attached, so an attacker doesn't need to guess where to try the login, they can go straight to the account.

What Was Inside the WaterCloud Log

• Email addresses tied to infected devices
• Plaintext passwords saved in the victim's browser
• URLs identifying the exact site each login was used on

Why This Matters Even at 7,208 Records

Every one of the 7,208 people in this log has real accounts tied to that email and password. If a password here is reused anywhere else, criminals can use it for credential stuffing, quietly testing the same login against banking sites, email providers, and shopping accounts. A single successful match can lead to account takeover, financial fraud, or identity theft, regardless of how large or small the original file was.

How a Stealer Log Like WaterCloud Gets Made

Stealer logs come from malware that infects a device, often through a fake download, cracked software, or a malicious attachment, then quietly copies saved browser passwords and autofill data before sending it back to the attacker. The stolen data from each infected device becomes part of a "log," and handles like ArhontCorp collect, name, and redistribute these logs through Telegram channels, sometimes offering them for free to build a reputation before selling access to larger, private collections.

Check If Your Login Was Caught in This Log

If a device you've used was ever infected by password-stealing malware, your login details could be sitting in a log like this one, no matter how small it looks. HEROIC's free dark web breach scanner checks your email against more than 400 billion leaked records, including stealer logs, so you can find out and change any exposed passwords right away.