General
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Target
https://disk.yandex.ru/d/WParBzB259JkAQ
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Sample
250207-slsj4sxkfp
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://disk.yandex.ru/d/WParBzB259JkAQ
Resource
win10v2004-20250129-en
Malware Config
Targets
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Target
https://disk.yandex.ru/d/WParBzB259JkAQ
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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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Drops file in Drivers directory
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Manipulates Digital Signatures
Attackers can apply techniques such as modifying certain DLL exports to make their binary seem valid.
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Boot or Logon Autostart Execution: Print Processors
Adversaries may abuse print processors to run malicious DLLs during system boot for persistence and/or privilege escalation.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Executes dropped EXE
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Indicator Removal: Clear Windows Event Logs
Clear Windows Event Logs to hide the activity of an intrusion.
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Loads dropped DLL
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Legitimate hosting services abused for malware hosting/C2
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Drops autorun.inf file
Malware can abuse Windows Autorun to spread further via attached volumes.
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Drops file in System32 directory
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Modifies termsrv.dll
Commonly used to allow simultaneous RDP sessions.
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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
2Print Processors
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Print Processors
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Indicator Removal
1Clear Windows Event Logs
1Modify Registry
2Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Discovery
Browser Information Discovery
1Query Registry
3System Information Discovery
3System Location Discovery
1System Language Discovery
1