The ArtHouse Cloud Logs Leak Means Someone Could Be Logging In

HEROIC analysts found a stealer log titled "ArtHouse Cloud Logs" that a Telegram user uploaded on November 11, 2025. The file contained 55,713 records tied to United States based accounts, including email addresses, plaintext passwords, and the URLs of the login pages those credentials belonged to.

Why This Is Dangerous

Right now, someone could be sitting with this file open, entering an email and password combination into a login page and watching it work. The passwords inside are stored in plaintext, meaning there is no encryption standing between an attacker and a working login, and the matching URL for each account tells them exactly where to try it. At more than 55,000 records, this is a large enough file that automated tools can run through it and test logins far faster than any person could type them.

What Was Exposed in the ArtHouse Cloud Logs Leak

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

Why This Matters for the 55,713 Affected Accounts

An email, password, and login URL bundled together gives an attacker everything needed to attempt account takeover with no guesswork. If anyone among these 55,713 accounts reused their password elsewhere, the same combination can be tested against banking, email, and shopping sites within minutes through automated credential stuffing tools. From there, the risk extends into identity theft and financial fraud, since a compromised email account is often the key to resetting passwords on everything else tied to it.

How a Stealer Log Like ArtHouse Cloud Logs Gets Built

A stealer log is the output of malware that infects a device and quietly harvests whatever login data it can find, typically credentials saved in a browser, autofill entries, and active session data. The infected machine sends this haul back to the attacker, who compiles results from many infected machines into a single labeled file and posts it to Telegram channels or dark web forums. Because the theft happens on the victim's own device rather than through a breach of a company's servers, a single stealer log can expose credentials for dozens of unrelated sites at once.

Check If You Are Affected

If you are based in the United States, or think your credentials could have been swept up in a stealer log campaign, checking your exposure now is worth doing before someone else finds out first. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including stealer log dumps like this one, to tell you whether your email address has surfaced in a known breach. If it has, change the affected password immediately, along with any other account where you reused it.