General
- Target msblockwin.exe
- Size 1.9MB
- Sample261020-spmg9ssx2p
- SHA256 ca7a70865edf32f35fc12397e853b2ff559c6faf8840758009a2650f95378372
Malware Config
Targets
-
- Target msblockwin.exe
- Size 1.9MB
- SHA256 ca7a70865edf32f35fc12397e853b2ff559c6faf8840758009a2650f95378372
Score10/10-
DCRat payload
-
Family: DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
-
Modifies WinLogon for persistence
-
Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
-
Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
-
.NET Reactor proctector
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes a file named after a Windows system binary
The file runs from a user directory while carrying the name of an executable that normally only exists in System32.
-
Executes dropped EXE
-
Adds Run key to start application
-
Drops file in System32 directory
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Masquerading
1Match Legitimate Name or Location
1Modify Registry
2