The MOONLOGSFREE Breach Put 11,370 Stolen Passwords and Email Pairs on Telegram

HEROIC analysts discovered the MOONLOGSFREE stealer log on November 7, 2023, when a Telegram user uploaded 715 individual log files containing a combined 11,370 stolen records. The data included plaintext passwords, email addresses, and API host URLs -- a set of credentials that provides attackers with immediate, ready-to-use access to personal accounts and potentially internal business infrastructure. MOONLOGSFREE was distributed freely on Telegram, meaning there was no financial barrier for anyone who wanted to download and use it. Most victims never recieve any notification that their data was part of this leak.

Why the MOONLOGSFREE Leak Is Dangerous

With over 11,000 records exposed in plaintext, MOONLOGSFREE represents one of the more significant stealer log releases from that period. Plaintext passwords are the most immediately usable form of stolen credential -- no cracking software, no decryption, no guesswork. An attacker who downloads this file can begin testing credentials against email providers, banking platforms, and business applications within minutes. The inclusion of API host URLs adds a further dimension: developers and businesses whose machines were infected may have had their application infrastructure exposed alongside their personal accounts. That creates a path from a single compromised laptop to a full corporate network breach.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs (sites and services accessed by victims)
• API host information

Why This Matters

The scale and structure of MOONLOGSFREE made it a valuable resource for criminal actors. At 11,370 records spanning 715 individual log files, the dataset was large enough to support automated credential stuffing campaigns against dozens of platforms simultaneously. Credentials from stealer logs like this one are typically tested, sorted by validity, and resold -- so even if you have not noticed any unauthorized account activity, your credentials may have already been used or are actively for sale. The free distribution of the file on Telegram meant it reached a wide audience quickly, compounding the risk. Security researchers have documented how stealer log data often re-surfaces months or years later in new attack campaigns, so credentials from November 2023 may still be in active use. Running a seperate check through HEROIC is the most reliable way to determine if your email appeared in this leak or any related releases.

How Stealer Log Breaches Work

Stealer logs are created by infostealer malware -- software that runs invisibly on a victim's computer or phone after being installed through a phishing email, a fake software download, or a compromised website. Once installed, the malware records every password typed or stored in a browser, captures session cookies and saved credentials, logs which websites and applications are accessed, and harvests API keys and stored tokens. All of this data is packaged into structured log files and transmitted to the attacker. The attacker then distributes the files through Telegram channels or dark web forums. The infection often occured months before the log file was ever posted publicly, giving attackers a long window to exploit the data before victims have any chance to respond. By the time MOONLOGSFREE appeared on Telegram, the credentials it contained had likely already been tested multiple times.

Check If You Are Affected

HEROIC offers a free scanner that searches through more than 400 billion leaked records -- including stealer logs like MOONLOGSFREE -- to tell you if your email address or passwords have been exposed. Because stealer log data often goes undetected by smaller breach notification services, checking through HEROIC gives you the most comprehensive picture of your exposure. Enter your email at HEROIC's free breach scanner to see if your credentials appeared in MOONLOGSFREE or any of the hundreds of other data leaks in our database.