General
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Target
gradlew.bat
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Size
3.1MB
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Sample
240723-rvk1ysxgna
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MD5
10484b2845bc5be1e77a4ca03b81996f
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SHA1
101a51ec35335cc2eaaa6315309924d5765ce6a5
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SHA256
c401439e32ff3789bc0f18182d58a13b661396fff40a86c3ffc290c151349356
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SHA512
35974b655d22f4b498f5b306d741ae97be1bb7a3973eee83961b705d5f027b6e2587f37e41ca3d6f4ebb2560553a848f3ace53899c429a81235d29bfab630957
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SSDEEP
98304:ub0FSgj8YFrn8RBXsGKZPEy8+4iQEk70j:uenj8YFrn8MPdj5SEkAj
Behavioral task
behavioral1
Sample
gradlew.exe
Resource
win7-20240705-en
Behavioral task
behavioral2
Sample
gradlew.exe
Resource
win10v2004-20240709-en
Malware Config
Targets
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Target
gradlew.bat
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Size
3.1MB
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MD5
10484b2845bc5be1e77a4ca03b81996f
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SHA1
101a51ec35335cc2eaaa6315309924d5765ce6a5
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SHA256
c401439e32ff3789bc0f18182d58a13b661396fff40a86c3ffc290c151349356
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SHA512
35974b655d22f4b498f5b306d741ae97be1bb7a3973eee83961b705d5f027b6e2587f37e41ca3d6f4ebb2560553a848f3ace53899c429a81235d29bfab630957
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SSDEEP
98304:ub0FSgj8YFrn8RBXsGKZPEy8+4iQEk70j:uenj8YFrn8MPdj5SEkAj
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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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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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Disables Task Manager via registry modification
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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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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1