General
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Target
DCRatBuild_protected.sfx.exe
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Size
2.3MB
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Sample
240619-t51v9stdrf
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MD5
442a5dbe203bf1dfe043c44a45df38b6
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SHA1
2d06e45186f6856e02644ab8550b85469a84afbc
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SHA256
3c2e56fa690da037a3fa6e5aca8864a15c9a402103f7db8387dff08d5ebeb217
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SHA512
320237df5d3101ab4925eb875198a21a341da2cb176af2f0dc7f51c3952bbedb83f473d47730f6d2b989ee3e4ce659ceee5fec6263476b2d61fa1569f95d9a79
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SSDEEP
49152:lOtT5572ZjEpnO4YfjTYj5IcgIvN5Q/7D3X+f4K1S38B2EHV3X:lOtTbnpufjU2NIDQzDHyh1dMEHV3X
Static task
static1
Behavioral task
behavioral1
Sample
DCRatBuild_protected.sfx.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
DCRatBuild_protected.sfx.exe
Resource
win10v2004-20240508-en
Malware Config
Targets
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Target
DCRatBuild_protected.sfx.exe
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Size
2.3MB
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MD5
442a5dbe203bf1dfe043c44a45df38b6
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SHA1
2d06e45186f6856e02644ab8550b85469a84afbc
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SHA256
3c2e56fa690da037a3fa6e5aca8864a15c9a402103f7db8387dff08d5ebeb217
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SHA512
320237df5d3101ab4925eb875198a21a341da2cb176af2f0dc7f51c3952bbedb83f473d47730f6d2b989ee3e4ce659ceee5fec6263476b2d61fa1569f95d9a79
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SSDEEP
49152:lOtT5572ZjEpnO4YfjTYj5IcgIvN5Q/7D3X+f4K1S38B2EHV3X:lOtTbnpufjU2NIDQzDHyh1dMEHV3X
Score10/10-
DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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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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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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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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Suspicious use of NtSetInformationThreadHideFromDebugger
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1