39,788 Email and Password Pairs: ArtHouse Cloud August Breach

A Telegram user uploaded a stealer log file on August 14, 2025 containing 39,788 records from ArtHouse Cloud. The file included email addresses, plaintext passwords, and the URLs of systems those accounts were used to access. No encryption, no obfuscation. Just raw credentials packaged and distributed to anyone with access to the channel. This is not a breach of a database server. It is the result of malware running on real devices, owned by real people, harvesting their credentials in real time.

Why This Is Dangerous

The ArtHouse Cloud stealer log from August 14, 2025 put 39,788 stolen email and password pairs online. That is not a theoretical risk. Those credentials are being tested against email providers, banks, cloud platforms, and corporate logins right now. Attackers do not manually check accounts. They use automated tools that can run through thousands of services in hours. Plaintext passwords mean there is no cracking step. The credentials work immediately. And the URLs in the dump tell attackers exactly which services to target first, making the exploitation more focused and more damaging.

What Was Exposed

• Email addresses from compromised ArtHouse Cloud user accounts
• Plaintext passwords captured live from infected endpoints by stealer malware
• URLs and API hosts indicating which services were actively in use
• 39,788 total records leaked on August 14, 2025
• Distributed publicly via Telegram with no gate or paywall

Why This Matters

Thirty-nine thousand exposed accounts is a significant number, but the real damage multiplies from there. Most people use the same password across multiple services. When a stealer log hits the open market, attackers do not just try it on ArtHouse Cloud. They run it against Gmail, Outlook, LinkedIn, corporate VPNs, banking portals, and anywhere else those email addresses might have an account. The URLs included in this dump act as a target list, pointing attackers directly at the most relevant services. Every day that passes without a password change is another day the window stays open.

How Stealer Log Works

Infostealer malware is designed for one purpose: silently extracting credentials from infected devices. It usually arrives as a trojanized application, a malicious email attachment, or a fake browser update. Once running, it reads saved passwords from Chrome, Firefox, Edge, and other browsers, grabs autofill data, harvests session cookies, and records keystrokes during login. All of that is bundled into a structured log file and sent to the attacker's server without triggering any visible alerts. The process can complete in under two minuts. The resulting log files are then aggregated and sold or shared on dark web forums and public Telegram channels, where they get picked up by credential stuffers, phishers, and other threat actors.

Check If You Are Affected

HEROIC Guardian has indexed over 400 billion exposed records across thousands of known breaches, including this ArtHouse Cloud stealer log from August 2025. You can search your email address right now to see whether your credentials were included in this dump or any other known leak.

Run a free search on HEROIC Guardian and know exactly where your data stands. No account needed, results in seconds.