Technical Information
To ensure autorun and distribution
Sets the following service settings
- [HKLM\SYSTEM\CurrentControlSet\Services\C1971A8B] 'ImagePath' = '<DRIVERS>\C1971A8B.sys'
Creates the following services
- 'C1971A8B' <DRIVERS>\C1971A8B.sys
Malicious functions
Intercepts control using hardware breakpoints
in NTDLL dll
- a0bc3d2388.exe process, ntdll.dll module
Modifies file system
Creates the following files
- <Current directory>\a0bc3d2388.exe
- %TEMP%\deadstar\secureenginesdk64.dll
- %TEMP%\deadstar\vehhandler.dll
- <DRIVERS>\c1971a8b.sys
Sets the 'hidden' attribute to the following files
- %TEMP%\deadstar\vehhandler.dll
Deletes following files that it created itself
- %TEMP%\deadstar\secureenginesdk64.dll
- %TEMP%\deadstar\vehhandler.dll
Deletes itself.
Network activity
UDP
- DNS ASK mo#####.map.fastly.net
Miscellaneous
Searches for the following windows
- ClassName: '' WindowName: 'Rust'
Creates and executes the following
- '<Current directory>\a0bc3d2388.exe' --deadstar-morphed
Executes the following
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoProfile -NonInteractive -WindowStyle Hidden -Command "Wait-Process -Id 3528 -ErrorAction SilentlyContinue; Remove-Item -LiteralPath '<Full path to file>' -Force"
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoProfile -NonInteractive -WindowStyle Hidden -Command "Wait-Process -Id 3528 -ErrorAction SilentlyContinue; Remove-Item -LiteralPath '<Full path to file>' -Force"' (with hidden window)
