Credentials From LOGS Uploaded by a Telegram User Leaked in 2023

Stealer Log Uploaded to Telegram Exposed 10,297 Records

HEROIC analysts identified a stealer log dataset uploaded by a Telegram user in July 2023 that exposed 10,297 records. The dataset contained endpoint credentials, email addresses, API host information, and plaintext passwords harvested through malware-based credential theft. This type of exposure represents one of the most dangerous categories of data leaks because the credentials are ready to use immediately.

Why This Is Dangerous

Stealer logs contain active, harvested credentials pulled directly from infected machines. Unlike database dumps that may contain old or hashed passwords, stealer log data is typically current and in plaintext. An attacker with this data can immediately attempt to log into email accounts, corporate portals, cloud services, and financial platforms. The inclusion of URLs makes this especially actionable -- attackers know exactly which site each credential belongs to.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (target site context for each credential)

Why This Matters

Plaintext passwords combined with email addresses and target URLs create a complete attack package. Threat actors can use these records for credential stuffing attacks across dozens of platforms, account takeover on email and financial services, identity theft by accessing personal accounts, and resale of working credential pairs on dark web marketplaces. Because passwords are in plaintext, there is no cracking step -- the data is weaponized the moment it is shared.

How Stealer Logs Work

Stealer logs are generated by infostealer malware -- malicious software that silently infects a victim's device and extracts saved passwords, browser cookies, autofill data, and session tokens. The malware transmits this data to a command-and-control server, where it is packaged into log files and distributed via dark web forums or, increasingly, Telegram channels. Victims typically have no idea their credentials have been harvested until the data appears in a breach notification or is used in an attack.

Check If You Are Affected

If your email address or credentials appear in this stealer log or any of the 400 billion+ records in HEROIC's breach database, you need to know immediately. Use HEROIC's free breach scanner to check your exposure right now -- no account required.