What Are Stealer Logs? The Lunar Cloud Logs Breach Explained

Lunar Cloud Logs Stealer Log Breach: 50,871 Records Leaked on Telegram

In June 2025, a Telegram user uploaded a stealer log collection known as "Lunar Cloud Logs LunarLogsFree" that exposed over 50,000 individual records. This breach is part of a growing wave of infostealer malware campaigns where cybercriminals harvest credentials directly from infected devices and then distribute the stolen data through Telegram channels and dark web forums. The leaked dataset includes email addresses, plaintext passwords, and associated URLs, giving attackers a direct path into victims' online accounts.

Why This Breach Is Particularly Dangerous

Stealer log breaches are among the most dangerous types of data exposures because the information they contain comes directly from compromised devices. Unlike a traditional database breach where hashed passwords might offer some protection, stealer logs typically capture credentials exactly as the user typed them. This means every password in this dataset is immediately usable by anyone who obtains it. The 50,871 records in this leak represent real people whose computers or phones were infected with malware, often without their knowlege.

What Was Exposed in the Lunar Cloud Logs Breach

• Email Addresses - Full email addresses tied to online accounts across multiple platforms and services
• Plaintext Passwords - Actual passwords captured in readable form, not encrypted or hashed in any way
• URLs - The specific websites and login pages where these credentials were entered, revealing exactly which accounts are compromised

Why This Matters for Your Digital Security

When credentials are leaked in plaintext alongside the exact URLs where they were used, attackers dont need to do any guesswork. They can simply log in to your accounts using the exact information you typed. Even worse, most people reuse passwords across multiple sites, meaning a single exposed credential from this breach could unlock your email, banking, social media, and other critical accounts. The fact that this data was freely shared on Telegram means it has likely been downloaded by thousands of malicious actors already.

How Stealer Log Attacks Work

Stealer logs are created by a category of malware known as "infostealers." These malicious programs are typically delivered through phishing emails, fake software downloads, or compromised websites. Once installed on a victim's device, the malware silently monitors and records everthing the user types, including usernames, passwords, credit card numbers, and other sensitive data. The malware then packages this information into organized log files and sends them back to the attacker's server. From there, the stolen data is often sold in bulk on dark web marketplaces or distributed freely through channels like Telegram to build reputation within criminal communites.

Check If Your Information Was Exposed

With over 50,000 records compromised in this breach, it is essential to determine whether your credentials were included. HEROIC's free data breach scanner searches across more than 400 billion compromised records, including stealer log datasets like this one, to tell you exactly which breaches have affected your accounts. If your information appears in this or any other breach, you should immediately change your passwords and enable two-factor authentication on all affected accounts.

Scan your email now with HEROIC's free breach scanner