ARCEUSULP 132 Leak Means Someone Could Be Logging Into Your Accounts

In June 2026, HEROIC analysts tracked a stealer log file shared on Telegram labeled ARCEUSULP 132, exposing 4,235 records. The dataset contains email addresses, plaintext passwords, and URLs collected by information-stealing malware from compromised devices. This file is part of a broader ARCEUSULP series, indicating a coordinated and ongoing campaign distributing stolen credentials through Telegram channels.

What Attackers Can Do With These Stolen Email and Password Combinations

Every record in this dataset contains a ready-to-use email and password pair paired with the URL where it was captured. Attackers use this information to attempt logins on other platforms the victim likely uses, including email providers, banking apps, and cloud storage services. Because passwords are stored in plaintext, no additional processing is required before these credentials can be put to work.

What the ARCEUSULP 132 Leak Exposed

• Email Addresses
• Plaintext Passwords
• URLs (endpoints where credentials were stolen)

Part of a Larger Campaign: What the ARCEUSULP Series Means

The ARCEUSULP naming convention across multiple files suggests an organized operation that regularly packages and distributes stolen credentials. Repeat dataset series like this indicate ongoing malware infrastructure that continues to collect credentials from newly infected devices. Victims may not yet know their device was compromised, making public disclosure and breach scanning tools critical for early detection.

How Stealer Log Breaches Work

Stealer logs are generated by information-stealing malware running silently on infected computers. The malware captures login credentials from browser password managers, auto-fill data, and active sessions, then records the associated URLs. These credentials are packaged into files and shared through Telegram channels and dark web forums. The ARCEUSULP files represent one such distribution chain, regularly releasing new batches of stolen credentials.

Check If Your Data Was Exposed

HEROIC's breach scanner covers more than 400 billion exposed records from thousands of breach datasets, including stealer log files from Telegram. Search your email for free to find out whether you appear in ARCEUSULP 132 or any of the related files in this campaign.