Search Your Email: Monster Cloud Free 11 Exposed 13,684 Accounts on Telegram

HEROIC analysts discovered a stealer log on November 1, 2023 after a Telegram user uploaded a file containing 13,684 records tied to a service called Monster Cloud Free 11. The data inside included email adresses, plaintext passwords, and URLs associated with cloud endpoints and API hosts. The log appeared to have been harvested from devices running stealer malware that specifically targeted saved credentials for cloud management services. The spike in chatter around these credentials in Telegram monitoring channels prompted us to examine the file in detail and document the scope of exposure.

Why This Is Dangerous

When a stealer log includes plaintext passwords alongside the exact URLs they unlock, attackers have a complete package. They do not need to guess, crack, or phish anyone. They simply try the email and password at the listed URL and see what opens. Cloud management platforms are an especially high-stakes target because they may control multiple endpoints, user accounts, or automated processes. A single compromised admin credential in a file like this can give an attacker broad access to infrastructure that was never meant to be touched by outsiders. Every one of the 13,684 records in this file represents that exact risk.

What Was Exposed

• Email addresses linked to Monster Cloud Free 11 accounts
• Plaintext passwords (unencrypted and immediately usable)
• URLs including cloud management endpoints and API hosts
• Total records: 13,684
• Date first seen: November 1, 2023
• Distribution channel: Telegram

Why This Matters

Most people do not find out their credentials were leaked until long after an attacker has already used them. Stealer logs like this one move fast. Within hours of being posted to Telegram, the file can be downloaded by dozens of bad actors who run automated tools against every account in the list. By the time a victim notices something is wrong, the attacker may have already changed account settings, exfiltrated data, or used the compromised account to attack others. The Monster Cloud Free 11 leak is a clear example of why proactive breach monitoring matters more than reacting after the fact.

How Stealer Logs Work

Stealer malware typically arrives through a phishing email, a compromised download, or a malicious browser extension. Once it lands on a device, it runs silently in the background and collects every saved password, browser cookie, and autofill entry it can find. It then sends this data back to the attacker in a neatly organized log file sorted by service type. Attackers who recieve these files often post them to Telegram channels where other criminals can download and exploit them. The Monster Cloud Free 11 log followed this exact pattern, moving from infected devices to a Telegram dump in a matter of days.

Check If You Are Affected

HEROIC's free breach scanner has indexed more than 400 billion leaked records, including stealer logs like this one from Monster Cloud Free 11. Enter your email address right now to find out if your credentials were exposed. If your email shows up in the results, change the affected password immediately, check every other service where you use the same password, and enable two-factor authentication to block unauthorized logins going forward.