One ArtHouse Cloud v3 Password Could Unlock a Chain of Accounts

In July 2026, HEROIC identified a stealer log collection titled ArtHouse Cloud v3 being shared on Telegram. The dataset holds 14,688 records of stolen credentials captured by infostealer malware. With passwords stored in plaintext, each compromised record is a ready-made key that attackers can use to walk into victims' accounts.

Plaintext Passwords Leave Zero Room for Protection

The passwords in this leak appear in their original, unaltered form — no encryption, no hashing, nothing standing between an attacker and your account. This makes them the most dangerous type of credential leak. Anyone with access to the data can immediately attempt logins using the exact passwords victims chose.

What Was Exposed

• Email Addresses — tying victims to their accounts and making them phishing targets
• Plaintext Passwords — ready for direct use in unauthorized login attempts
• URLs — pinpointing the websites and services where each credential was harvested

How One Password Opens the Door to Everything

Most people use the same password across several services. Attackers know this, and they capitalize on it through credential stuffing — taking stolen login pairs and systematically trying them on hundreds of websites. Your email password could also be your banking password, your cloud storage password, and your social media password. One match from this dump is all it takes to start an account takeover cascade.

Stealer Logs: The Silent Credential Harvester

This data was captured by infostealer malware that runs invisibly on infected devices. These programs monitor browser activity, extract saved passwords, copy session cookies, and record autofill data. The infected user never sees a warning. The stolen credentials are then compiled into structured log files and circulated through underground channels, ready for mass exploitation by other criminals.

Check If Your Credentials Were Exposed

Even if you have never heard of ArtHouse Cloud, your credentials could still appear in this dump — stealer logs capture data from every site a victim visits. HEROIC maintains a database of over 400 billion compromised records. Use HEROIC's breach scanner to check your email or domain and discover whether your credentials have surfaced in this or any other known breach.