Inside the 1.6 LOGS_CENTEER Breach: How 27,294 Records Were Compromised

In January 2023, a Telegram user uploaded a stealer log file to a public channel under the name LOGS_CENTEER, exposing 27,294 records pulled from infected endpoints across the United States. The file contained email addresses, plaintext passwords, and associated URLs, giving anyone who downloaded it direct access to the credentials of real people. That kind of data does not stay in one place for long.

Why This Is Dangerous

When passwords are exposed in plaintext, there is no recovery window. Hashed passwords at least require attackers to invest time cracking them, but plaintext credentials can be plugged directly into login forms the moment the file is in someone's hands. The 27,294 records in the LOGS_CENTEER dump represent thousands of people who likely had no idea their machine had been compromised in the first place.

Stealer logs shared on Telegram tend to circulate fast. They get picked up by automated credential stuffing tools, sold on dark web marketplaces, and bundled into larger combo lists. By the time a file like this is flagged and indexed by breach monitoring services, the initial wave of account takeover attempts has often already occured.

What makes this particularly concerning is the URL data included alongside the credentials. Attackers can use those URLs to understand exactly which services the victim uses, making social engineering and targeted phishing much easier to pull off.

What Was Exposed

• Email addresses harvested from compromised machines
• Plaintext passwords captured at the point of infection
• Website and application URLs tied to saved logins
• API host addresses that reveal connected services
• Endpoint device identifiers from infected systems
• Browser-saved credential pairs for various platforms
• Session-related data captured during active browsing

Why This Matters

A dump of 27,294 records is large enough to fuel a sustained credential stuffing campaign against popular services. Attackers will test these logins against email providers, banking apps, and social platforms, knowing that a meaningful percentage of people reuse passwords across sites. Even one successful login can lead to account takeover, financial theft, or identity fraud.

The LOGS_CENTEER breach is also a reminder that the threat does not end when the file is uploaded. Credentials like these get recycled for months or even years after the initial leak, showing up in new combo lists and automated attack tools. If you have not changed the passwords that were active on your devices in early 2023, your risk is still ongoing.

How Stealer Log Works

Infostealer malware is typically spread through phishing emails with malicious attachments, fake software cracks and keygens, trojanized downloads from shady sites, or malicious browser extensions. Once installed on a device, the malware runs quietly in the background and begins pulling credentials out of browsers, saved login stores, and any local files that contain authentication data.

The collected data gets packaged into a structured log file, sometimes called a stealer log or infostealer log, which is then exfiltrated to a remote server or drop location controlled by the attacker. From there, it either gets used directly, sold in bulk, or uploaded to distribution channels like Telegram where other actors can access it freely.

The LOGS_CENTEER file fits this pattern exactly. It was distributed via Telegram as a free release, which is a common tactic among threat actors looking to build credibility or simply dump data they no longer find profitable. Free releases like this one are adressed by researchers quickly, but by then the credentials have often been used many times over.

Check If You Were Affected

If you were active online in early 2023 and want to know whether your credentials appeared in the LOGS_CENTEER dump or any other known breach, run a free check at heroic.com. HEROIC's breach checker scans across thousands of indexed breach files and tells you exactly where your data has shown up, so you can take steps to secure your accounts right away.