The ArhontCloud Telegram Leak Exposed 34,470 US Credentials

HEROIC analysts uncovered this breach while monitoring Telegram channels known for hosting stolen credential packages. In September 2025, an anonymous Telegram user uploaded a stealer log file labeled Private Pack LogsArhontCloud, exposing 34,470 records of US-based account holders. The file contained email addresses, plaintext passwords, and internal API hostnames that were harvested silently from infected endpoints. The date of first appearance was confirmed as September 7, 2025. What made this dump stand out was not just the volume but the inclusion of internal application URLs pointing to infrastructure that should never be publicly exposed.

Why This Is Dangerous

When a stealer log leaks both passwords and internal API hostnames together, the risk multiplies. Attackers do not need to guess which system to target. They have a ready-made roadmap showing exactly where to log in and what credentials to use. Passwords stored in plaintext mean there is no hashing to crack. Anyone who downloads this file from Telegram can attempt logins immediatly without any additional work. For businesses whose employees were compromised, this opens a direct path into internal systems, not just personal accounts.

What Was Exposed

• Email addresses linked to US-based accounts
• Plaintext passwords with no encryption or hashing
• Internal URLs and API hostnames from compromised endpoints
• A total of 34,470 individual records harvested by stealer malware
• Data uploaded to a Telegram channel named ArhontCloud on September 7, 2025

Why This Matters

The United States remains the most targeted country for credential theft, and stealer logs like this one are a major reason why. This particluar file feeds directly into the credential stuffing pipeline. Cybercriminals take these email-password pairs and run automated scripts against banking sites, email providers, corporate VPNs, and cloud platforms. Even if a victim only used this password on one site, attackers will test it everywhere. The inclusion of API hostnames also suggests that whoever deployed this stealer was interested in corporate targets, not just consumer accounts.

How Stealer Logs Work

Stealer malware is a type of program that runs silently in the background on an infected computer. It copies saved passwords from browsers, harvests cookies, captures autofill data, and records keystrokes. The collected data is packaged into a log file and sent back to the attacker automatically. These log files are then sorted, bundled, and sold or shared on Telegram channels and dark web forums. The whole process can happen within minutes of infection. The victim rarely notices anything wrong until their accounts start getting accessed by strangers.

Check If You Are Affected

HEROIC's free breach scanner searches across more than 400 billion exposed records to tell you whether your email address appears in this breach or any other known data leak. If your credentials were part of the ArhontCloud Telegram dump, you need to know now so you can change your passwords and secure your accounts before someone else does. Run a free check at HEROIC and find out in seconds.