The STARLINKCLOUD3 Stealer Log Quietly Appeared on Telegram Last Fall

HEROIC analysts discovered a stealer log file uploaded to Telegram in October 2023 that exposed over 107,000 records linked to a dataset labled STARLINKCLOUD3. The file drew attention not because of loud announcements but because of what it contained: a structured collection of email addresses, plaintext passwords, and URLs pointing to cloud service endpoints. The naming convention suggested either a targeted effort against cloud infrastructure or a deliberate attempt to attract attention from buyers in underground markets. Either way, more than 107,000 people had their credentials sitting in plain sight on a Telegram channel.

Why This Is Dangerous

Stealer logs with cloud-related data are particularly valuable to attackers. A standard credential dump lets someone break into personal accounts. A dump that also contains API endpoints and cloud hostnames lets someone break into servers, databases, and entire business environments. The STARLINKCLOUD3 file appears to include both, which means the blast radius of this breach extends well beyond the individual victims whose passwords were exposed. Organizations whose employees were running infected devices may have had their internal cloud environments quietly mapped and accessed.

What Was Exposed

• Email addresses from compromised user accounts
• Plaintext passwords requiring no decryption to use
• URLs including potentially sensitive cloud service endpoints
• 107,154 total records in the STARLINKCLOUD3 dataset
• Data uploaded to a public Telegram channel on October 24, 2023
• Source: infostealer malware compiled log

Why This Matters

The cloud-specific angle of this breach makes it unusually high risk for businesses. When an employee's device is infected with infostealer malware, the malware does not just grab personal passwords. It grabs everything saved in the browser, including credentials to company cloud accounts, internal dashboards, and API keys. If any of the 107,154 records in this dump belong to people with access to company systems, those systems may have been exposed without anyone raising an alarm. The quiet nature of these Telegram drops is exactly what makes them dangerous: there is no news headline, no press release, and no notification to victims.

How Stealer Log Breaches Work

Infostealer malware is typically delivered through phishing emails, fake software downloads, cracked applications, or malicious browser extensions. Once installed on a victim's device, it runs silently in the background, harvesting saved passwords, autofill data, session tokens, and browser history. The collected data is packaged into a log file and sent to the attacker's infrastructure. The attacker then organizes these logs by category, sometimes by target type such as cloud services, and distributes them on Telegram channels or underground forums. The STARLINKCLOUD3 dump fits this exact pattern and represents just one of thousands of similar packages circulating at any given time.

Check If You Are Affected

HEROIC offers a free breach scanner that checks your email address against more than 400 billion leaked records sourced from stealer logs, dark web forums, and data breaches like the STARLINKCLOUD3 incident. The scan is completly free and takes only seconds. If your credentials are in circulation, you will know immediately so you can change passwords and secure your accounts before an attacker acts first. Visit HEROIC now and run your free check.