Telegram Threat Actor Exposes APRIL 25 – 6118 LOGS Data: 99,400 Records at Risk

A Telegram threat actor uploaded a stealer log file on December 26, 2023, exposing 99,400 records of compromised endpoint data from users in the United States. The file, labeled "APRIL 25 - 6118 LOGS," contained plaintext passwords, email addresses, and API host information, making it one of the more damaging credential dumps to surface that month. If your email or password was recieved by this actor, you could be at risk of account takeover right now.

Why This Is Dangerous

Stealer log dumps like this one are particularly dangerous because the passwords are stored in plaintext, meaning anyone who gets hold of the file can immediately use your credentials without any additional cracking effort. Unlike a database breach where passwords are hashed, these logs are ready to use out of the box.

The inclusion of API host information is also a serious concern that often gets overlooked. Attackers can use those API endpoints to map out connected services, internal tools, or cloud infrastructure, turning a simple credential dump into a full reconnaissance package. The damage from this kind of leak can extend far beyond the individual accounts that were directly compromised.

With nearly 100,000 records beleived to be in circulation across underground forums and Telegram channels, the window for credential stuffing attacks against affected users remains wide open. Many people reuse passwords across multiple sites, which means a single exposed credential can unlock a chain of accounts.

What Was Exposed

• Email addresses
• Plaintext passwords
• API host URLs and endpoint data
• Website login URLs associated with stolen credentials
• Session tokens and authentication cookies (common in stealer logs)
• Browser-saved form data including usernames
• Connected service identifiers

Why This Matters

This breach is a clear reminder that endpoint security is just as critical as perimeter defenses. The data in this log was not taken from a company server, it was pulled directly off infected personal and work computers, bypassing most traditional security controls entirely. The individuals caught up in this dump may not even know their device was compromised.

When credentials this sensitive hit Telegram, they spread fast. Threat actors share, sell, and trade these logs within hours of the initial upload. Victims who do not act quickly to change passwords and review account activity across all platforms are at serious risk of ongoing unauthorized access that can be difficult to detect and even harder to fully remediate.

How Stealer Log Works

Infostealer malware is typically distributed through phishing emails, fake software downloads, malicious browser extensions, or cracked application installers. Once a victim runs the infected file, the malware quietly installs itself on the endpoint and begins harvesting credentials stored in browsers, password managers, and cached login sessions. The whole process often completes in under a minute before the malware removes itself to avoid detection.

The harvested data is then packaged into a structured log file and transmitted back to the attacker's server or directly to a Telegram bot. From there, the threat actor either uses the credentials themselves, sells them on dark web marketplaces, or, as occured in this case, uploads the raw log to a Telegram channel for free distribution. Free dumps like this one are often used to build reputation within criminal communities.

What makes stealer logs especially hard to defend against is that the compromise happens on the user's device, not on the service they're logging into. Even accounts with strong, unique passwords can end up in a log if the device itself is infected. This is why endpoint protection and regular credential monitoring are so important, seperately from password hygiene alone.

Check If You Were Affected

If you think your credentials may have been caught up in this Telegram stealer log dump, you can check right now using HEROIC's free breach checker at heroic.com. Enter your email address to see if your data has appeared in this breach or any other known leak, and get guidance on what steps to take next to secure your accounts.