Severity
High
Analysis Summary
Researchers have analyzed the Dark Crystal RAT capabilities and C2 message format. Unlike a real RAT server, this one does not have a user interface to allow the attacker to pick and launch commands. Instead, it has a pre-scripted command list that it sends to the RAT. When the server starts up, it uses the Python BaseHTTPServer to begin listening for incoming web requests. Incoming POST requests are assumed to hold a file that the RAT is uploading to the server; this server assumes all file uploads are screenshots and saves them to “screen.png”. The server sends four types of commands in sequence: first, it hides the desktop icons; then, it causes the string “Hello this is tech support” to be spoken; next, it displays a message box asking for a password; finally, it launches the Windows Calculator.
Impact
- Data Theft
- Exposure of Sensitive Data
Indicators of Compromise
MD5
- 6741bbacaf37592c043b7a22ff56c538
- 59201b09f6fc392bdb47394618c44123
SHA-256
- a1a4171c888bb45ba62753af9d69469a6eba3d9bffdc8ea46b6f37c61faa0c86
- bb5e6247f19aab28d71dc53718c43d397e2424ea57325c4c213988ea22474da0
SHA-1
- 021eb72ce931c3b7003f1ced72f0c15a2ca5d991
- cab97b0ebf4d41f9e6105db3a3ebaf47998977e6
Remediation
- Block the threat indicators at their respective controls.
- Search for IOCs in your environment.