The Monster Cloud Free 6 Leak Exposed 9,389 US Cloud Accounts on Telegram

On October 31, 2023, a Telegram user posted a stealer log labeled Monster Cloud Free 6 containing 9,389 records from what appears to be a US-based cloud service. The data included email addresses, plaintext passwords, API host information, and endpoint identifiers pulled from infected devices. The US-focused profile of this log is consistent with targeted stealer campaigns that deliberately sort their collections by region to make the data more actionable for buyers who want to attack specific geographies or financial systems.

Why This Is Dangerous

A regional focus in a stealer log is not accidental. Threat actors who sort logs by country are typically preparing for attacks on region-specific financial institutions, payment processors, and cloud platforms. US-targeted credentials carry premium value because they often correspond to accounts with higher balances, more connected services, and access to systems that process dollar-denominated transactions. The plaintext passwords in this log eliminate any technical barier between the stolen data and active exploitation.

What Was Exposed

• 9,389 total records
• Email addresses
• Plaintext passwords (stored without any hashing or encrytion)
• API host names and endpoint URLs
• Cloud service access credentials tied to US-based accounts

Why This Matters

The Monster Cloud Free 6 log is part of a broader pattern of stealer logs targeting cloud infrastructure users in the United States. When cloud credentials are combined with API endpoint data, attackers can move laterally from a user account into backend systems, potentially accessing data belonging to other users of the same platform. A single cloud service breach can therefore have downstream consequences for everyone on that platform, not just the 9,389 individuals directly named in this log.

How Stealer Log Breaches Work

Stealer malware compromises a device through malicious downloads, phishing links, or trojanized software. Once running, it silently extracts credentials from every application on the device, packages them into a structured log file, and transmits the file to an operator's collection server. That operator then categorizes the logs by region, service type, and data richness before posting them to Telegram channels or selling access to private buyer groups. Monster Cloud Free 6 represents one package in what is likely a much larger regional collection targeting US cloud users harvested during a specific malware campaign.

Check If You Are Affected

HEROIC's free breach scanner searches more than 400 billion exposed records, including US-focused stealer log collections like Monster Cloud Free 6, to check whether your email address or credentials have been compromised. If you use any cloud storage or hosting service and your device may have been infected in 2023, checking now is critical. Run your free scan at heroic.com and change any reused passwords immediately.