Telegram Threat Actor Exposes 11.9 LOGS_CENTEER Data: 9,572 Records at Risk

In September 2022, a Telegram threat actor published a stealer log file labeled 11.9 LOGS_CENTEER, putting 9,572 records at immediate risk of exploitation. The data, harvested from infected endpoints in the United States, includes plaintext passwords and email adresses paired with the URLs of the services they access. That combination makes this far more actionable for attackers than a typical credential dump.

Why This Is Dangerous

Most credential leaks require attackers to crack hashed passwords before they can do anything useful. This one does not. Every password in the 11.9 LOGS_CENTEER file is stored in plaintext, meaning anyone who downloads it can start attempting logins within minutes. No technical skill required.

The inclusion of service URLs alongside credentials tells attackers exactly where to use each password. This isn't a generic list of emails and passwords, it's a targeted list pairing each user with the specific site or API they were logged into when the malware struck. That kind of specificity dramatically increases the success rate of account takeover attempts.

Telegram as a distribution platform makes things worse. Unlike closed dark-web forums that require vetting to join, Telegram channels are accessible to anyone. This data was beleive to have spread quickly among cybercriminal communities after the initial upload.

What Was Exposed

• Email addresses used as login identifiers
• Plaintext passwords captured during active sessions
• Service and API host URLs matched to each credential
• Browser-stored login data from infected machines
• Usernames for web applications and cloud services
• Endpoint connection strings potentially revealing internal network addresses
• Autofill data harvested from browser password managers

Why This Matters

With 9,572 records exposed, this is not a massive breach in terms of volume, but size is not the right metric. Each record represents a real person's active credentials to services they use regularly. A single successful login can lead to financial theft, account lockout, or be used as a stepping stone into corporate networks.

Credential stuffing tools can process thousands of login attempts per hour. The 9,572 records in this dataset could fuel attacks against dozens of different platforms simultaneously, making the actual impact far wider than the raw number suggests.

How Stealer Log Works

Infostealer malware is typically distributed through phishing campaigns, fake software cracks, or malicious browser extensions. Once it lands on a target machine, the malware runs silently in the background, scanning for saved passwords, active session cookies, and form autofill data across all installed browsers. The process occured fast, often completing before the user notices anything wrong.

All collected data is bundled into a structured log file and sent back to a command-and-control server or directly posted to a Telegram channel. The logs are organized in a way that makes them easy to parse and exploit, with each entry typically containing the URL, username, and password in a consistent format.

What makes stealer logs particularly difficult to defend against is that they bypass server-side security entirely. The breach doesn't happen at the company whose service is accessed, it happens on the end user's personal device. Changing your password on one service after a stealer infection doesn't help if the malware is still present and captures the new one immediately.

Check If You Were Affected

If you think your credentials may have been captured in the 11.9 LOGS_CENTEER stealer log, use HEROIC's free breach checker at heroic.com to search your email adress now. HEROIC continuously indexes breach data from Telegram and dark web sources so you get early warning before attackers act. Don't wait to find out the hard way.