The Monster Cloud Free 6 Breach Gave Hackers 21,628 Plaintext Passwords Ready to Use

In October 2023, an anonymous Telegram user uploaded a file labeled "Monster Cloud Free 6" to a public channel. Security analysts discovered the file contained a stealer log with 21,628 records pulled directly from compromised endpoints. Each record included an email address, a plaintext password, and the URL of the service the victim had logged into. The data originated in the United States and was freely accessible to anyone who encountered the Telegram post -- no purchase, no dark web access required.

Why This Is Dangerous

Attackers who obtained this log did not need to do any additional work. The passwords were already in plaintext -- no cracking, no decryption. With an email address and a ready-to-use password, a threat actor can attempt to log into email accounts, banking portals, social media, cloud services, and anywhere else the victim may have reused the same credentials. The included URLs act as a roadmap, telling the attacker exactly which services each victim was using. This combination -- email, password, and service URL -- is one of the most complete and exploitable credential packages a hacker can get.

What Was Exposed in the Monster Cloud Free 6 Breach

• Email addresses
• Plaintext passwords (no hashing, no encryption)
• URLs of compromised services and platforms
• API host and endpoint details

Why This Matters

With 21,628 credential sets in a freely distributed log, the potential for widespread account takeover is real. Credential stuffing tools can automate login attempts across hundreads of platforms in minutes. Even if you secured one account, any service where you reused the same password is still at risk. Leaked email addresses also become vectors for spear phishing -- attackers can craft convincing messages knowing exactly which services you use. The identity theft and fraud potential from this type of breech is significant, especially when financial or healthcare accounts are involved.

How Stealer Log Breaches Work

Stealer malware is typically delivered through phishing emails, fake software downloads, or malicious browser extensions. Once installed on a victim's machine, it runs silently in the background, harvesting saved passwords from browsers, email clients, and apps. It collects session cookies, login URLs, and any credentials stored locally. The malware bundles all this data into a structured log file and sends it back to the attacker. These logs are then packaged and either sold on criminal marketplaces or -- as in this case -- posted freely on Telegram channels for anyone to download and exploit.

Check If You Are Affected

Your credentials could be among the 21,628 records in this leak. HEROIC's free scanner searches across a database of over 400 billion compromised records to check if your email address or passwords have been exposed. It takes seconds to search, and finding out early gives you the best chance to protect your accounts before someone else uses your data against you.