General
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Target
https://drive.google.com/file/d/1NCwivitAp8L9cUVOSGCHd87NU-iDSbCu/view?usp=sharing
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Sample
250201-yv4xdszmcr
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://drive.google.com/file/d/1NCwivitAp8L9cUVOSGCHd87NU-iDSbCu/view?usp=sharing
Resource
win10ltsc2021-20250128-en
Malware Config
Targets
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Target
https://drive.google.com/file/d/1NCwivitAp8L9cUVOSGCHd87NU-iDSbCu/view?usp=sharing
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Modifies WinLogon for persistence
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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Downloads MZ/PE file
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Event Triggered Execution: Image File Execution Options Injection
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Checks whether UAC is enabled
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Legitimate hosting services abused for malware hosting/C2
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Checks system information in the registry
System information is often read in order to detect sandboxing environments.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Modify Registry
4Subvert Trust Controls
1Install Root Certificate
1Discovery
Browser Information Discovery
1Network Share Discovery
1Peripheral Device Discovery
1Query Registry
7Remote System Discovery
1System Information Discovery
7System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
1Internet Connection Discovery
1