Telegram Threat Actor Exposes 25.7 LOGS_CENTEER Data: 8,252 Records at Risk

A Telegram threat actor uploaded a stealer log file in July 2022 containing 8,252 records tied to compromised endpoints across the United States. The file, labeled "25.7 LOGS_CENTEER," exposed plaintext passwords alongside email adresses and API host URLs, putting every account in that dataset at immediate risk. If your credentials were in this log, someone may have already tried using them.

Why This Is Dangerous

Stealer logs are not just passive data dumps. They represent active, working credentials harvested directly from infected machines, which means every entry in this file was likely valid at the time of capture. Attackers who recieved this data can attempt to log into email accounts, cloud services, and internal tools with very little effort.

The inclusion of plaintext passwords is what makes this breach particularly severe. There is no cracking required, no hashing to reverse. The credentials are ready to use, and when people reuse passwords across multiple services, a single log file can unlock dozens of accounts per victim.

API host URLs in the dataset also suggest some victims were connected to backend systems or developer environments, meaning the blast radius of this breach could extend well beyond personal accounts into organizational infrastructure.

What Was Exposed

• Email addresses
• Plaintext passwords
• API host URLs and endpoint data
• Login session metadata from infected endpoints
• Browser-stored credentials
• Service access tokens (likely)
• Device and connection identifiers

Why This Matters

Even though this log was uploaded in 2022, the data remains dangerous. People rarely change passwords unless they know they've been compromised, and most victims of stealer logs never find out. That means credentials from this file may still be valid today, sitting in underground forums or private Telegram channels waiting to be used.

Breaches like this one are often treated as minor because the record count is relatively small. But 8,252 records is 8,252 real people with real accounts. Each one is a potential entry point for identity theft, account takeover, or financial fraud. The damage from a single compromised email account can be significant and far-reaching.

How Stealer Log Works

Stealer malware is typically delivered through phishing emails, fake software downloads, or malicious browser extensions. Once installed on a victim's device, it runs silently in the background and collects everything it can find, including saved passwords from browsers, cookies, clipboard content, and credentials stored in local applications.

The collected data is then packaged into a log file and sent to a command-and-control server or directly to a Telegram channel operated by the attacker. These logs are often sold, traded, or shared freely in underground communities, which is how a file like this one ends up publicly accessable to thousands of bad actors at once.

What makes stealer logs distinct from database breaches is the source. The data doesn't come from a compromised server, it comes directly from the victim's own machine. This means traditional server-side security measures do nothing to prevent it, and the credentials captured are almost always current and valid at the time of theft.

Check If You Were Affected

If you think your credentials may have been included in the 25.7 LOGS_CENTEER dataset or any other breach, you can check your exposure right now using HEROIC's free breach checker at heroic.com. HEROIC monitors thousands of breach datasets and stealer log collections, and can tell you whether your email address or passwords have been compromised so you can take action before someone else does.