Moon_FreeLogsPREMIUM Stealer Log: 5,430 Passwords Exposed Online

In November 2022, a stealer log file was quietly uploaded to Telegram by an anonymous user, exposing 5,430 records from the Moon_FreeLogsPREMIUM dataset. The file contained plaintext passwords, email addresses, and URLs harvested directly from compromised endpoints. Plaintext passwords are the worst-case scenario in any data breach: there is no hashing, no salting, no decryption step required. Anyone who obtained this file had immediate, ready-to-use access to every account in it. If your email address was among them, your password was handed over in the open.

Why This Is Dangerous

Stealer logs are not passive leaks. They are the product of malware running silently on a victim's device, vacuuming up everything typed, saved, or autofilled. The Moon_FreeLogsPREMIUM upload exposed credentials alongside API host information, which means attackers gained not just account access but a potential pathway into backend infrastructure. Credential stuffing tools can test thousands of password combinations per minute, and when the passwords are already in plaintext, that step is skipped entirely. The risk of account takeover, financial fraud, and unauthorised API access is immediate and severe.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (including API endpoints and host addresses)

Why This Matters

The exposure of API host information alongside user credentails is what separates this stealer log from a simple password dump. Attackers who access backend APIs can manipulate application data, bypass standard authentication flows, and move laterally through connected systems. The Telegram distribution channel also matters: files shared on Telegram can be downloaded by thousands of users within hours, meaning this data circulated far beyond a single threat actor. By the time such uploads are discovered through threat intelligence monitoring, the information has already spread across mulitple dark web forums and private channels.

How Stealer Log Breaches Work

A stealer log breach begins with malware infection, typically delivered through a phishing email, a malicious download, or a compromised software installer. Once installed, the malware runs in the background and captures keystrokes, saved browser passwords, autofill data, and session cookies. It bundles everything into a log file and exfiltrates it to the attacker's server. These logs are then sorted, packaged, and sold or distributed on dark web marketplaces and Telegram channels. Victims rarely know their device was infected until their accounts start showing unauthorised access. The Moon_FreeLogsPREMIUM name suggests this was marketed as a premium-quality log set, indicating the data was curated and considered high value by the criminal community.

Check If You Are Affected

HEROIC's free scanner checks your email against a database of over 400 billion exposed records, including stealer logs like this one. Enter your email address and find out in seconds whether your credentials appear in this breach or any other known data exposure. Early detection is the only reliable way to get ahead of account takeover. If your email appears, change your passwords immediately, enable two-factor authentication on every account, and watch for any suspicious login activity.