Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
28-11-2024 07:15
Behavioral task
behavioral1
Sample
CDKServ2.exe
Resource
win7-20240708-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
CDKServ2.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
18 signatures
150 seconds
Behavioral task
behavioral3
Sample
GAME_C~1.exe
Resource
win7-20240903-en
windows7-x64
1 signatures
150 seconds
Behavioral task
behavioral4
Sample
GAME_C~1.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
1 signatures
150 seconds
General
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Target
CDKServ2.exe
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Size
659KB
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MD5
a495d2d70488d972fd59a131057177b8
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SHA1
5a378bfdd0c0588a6147814a94473c7945221a43
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SHA256
e96b4b4d335b0ef0fa83b87d278b560dbf0194a7fe30d4fefc1c8733c7769253
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SHA512
2406d61e68b7edcf7cb941418c9f63270e7e0241b1152b1c69576a086315cb32bf1e1718f79900d8839b648cf16868a52038e3a5488595b770dad22f521cbfc8
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SSDEEP
12288:59AFlAd0Z+89cxTGzO4AucTD8QP2lmFSrVs9LqnKX:/AQ6Zx9cxTmOrucTIEFSpOG6
Score
10/10
Malware Config
Signatures
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Darkcomet family
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\CDKeyList\\CDKeyList.exe" CDKServ2.exe -
Checks BIOS information in registry 2 TTPs 3 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate CDKServ2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate CDKeyList.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation CDKServ2.exe -
Executes dropped EXE 1 IoCs
pid Process 2264 CDKeyList.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CDKeyList = "C:\\CDKeyList\\CDKeyList.exe" CDKServ2.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1472 set thread context of 4532 1472 CDKServ2.exe 85 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 3004 5104 WerFault.exe 83 -
System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CDKServ2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language notepad.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CDKeyList.exe -
Checks processor information in registry 2 TTPs 12 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier CDKServ2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier explorer.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 CDKeyList.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString CDKeyList.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier CDKeyList.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier CDKeyList.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 CDKServ2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString CDKServ2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier CDKServ2.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier explorer.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier CDKServ2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier CDKeyList.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ CDKServ2.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4532 explorer.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1472 CDKServ2.exe Token: SeSecurityPrivilege 1472 CDKServ2.exe Token: SeTakeOwnershipPrivilege 1472 CDKServ2.exe Token: SeLoadDriverPrivilege 1472 CDKServ2.exe Token: SeSystemProfilePrivilege 1472 CDKServ2.exe Token: SeSystemtimePrivilege 1472 CDKServ2.exe Token: SeProfSingleProcessPrivilege 1472 CDKServ2.exe Token: SeIncBasePriorityPrivilege 1472 CDKServ2.exe Token: SeCreatePagefilePrivilege 1472 CDKServ2.exe Token: SeBackupPrivilege 1472 CDKServ2.exe Token: SeRestorePrivilege 1472 CDKServ2.exe Token: SeShutdownPrivilege 1472 CDKServ2.exe Token: SeDebugPrivilege 1472 CDKServ2.exe Token: SeSystemEnvironmentPrivilege 1472 CDKServ2.exe Token: SeChangeNotifyPrivilege 1472 CDKServ2.exe Token: SeRemoteShutdownPrivilege 1472 CDKServ2.exe Token: SeUndockPrivilege 1472 CDKServ2.exe Token: SeManageVolumePrivilege 1472 CDKServ2.exe Token: SeImpersonatePrivilege 1472 CDKServ2.exe Token: SeCreateGlobalPrivilege 1472 CDKServ2.exe Token: 33 1472 CDKServ2.exe Token: 34 1472 CDKServ2.exe Token: 35 1472 CDKServ2.exe Token: 36 1472 CDKServ2.exe Token: SeIncreaseQuotaPrivilege 4532 explorer.exe Token: SeSecurityPrivilege 4532 explorer.exe Token: SeTakeOwnershipPrivilege 4532 explorer.exe Token: SeLoadDriverPrivilege 4532 explorer.exe Token: SeSystemProfilePrivilege 4532 explorer.exe Token: SeSystemtimePrivilege 4532 explorer.exe Token: SeProfSingleProcessPrivilege 4532 explorer.exe Token: SeIncBasePriorityPrivilege 4532 explorer.exe Token: SeCreatePagefilePrivilege 4532 explorer.exe Token: SeBackupPrivilege 4532 explorer.exe Token: SeRestorePrivilege 4532 explorer.exe Token: SeShutdownPrivilege 4532 explorer.exe Token: SeDebugPrivilege 4532 explorer.exe Token: SeSystemEnvironmentPrivilege 4532 explorer.exe Token: SeChangeNotifyPrivilege 4532 explorer.exe Token: SeRemoteShutdownPrivilege 4532 explorer.exe Token: SeUndockPrivilege 4532 explorer.exe Token: SeManageVolumePrivilege 4532 explorer.exe Token: SeImpersonatePrivilege 4532 explorer.exe Token: SeCreateGlobalPrivilege 4532 explorer.exe Token: 33 4532 explorer.exe Token: 34 4532 explorer.exe Token: 35 4532 explorer.exe Token: 36 4532 explorer.exe Token: SeIncreaseQuotaPrivilege 2264 CDKeyList.exe Token: SeSecurityPrivilege 2264 CDKeyList.exe Token: SeTakeOwnershipPrivilege 2264 CDKeyList.exe Token: SeLoadDriverPrivilege 2264 CDKeyList.exe Token: SeSystemProfilePrivilege 2264 CDKeyList.exe Token: SeSystemtimePrivilege 2264 CDKeyList.exe Token: SeProfSingleProcessPrivilege 2264 CDKeyList.exe Token: SeIncBasePriorityPrivilege 2264 CDKeyList.exe Token: SeCreatePagefilePrivilege 2264 CDKeyList.exe Token: SeBackupPrivilege 2264 CDKeyList.exe Token: SeRestorePrivilege 2264 CDKeyList.exe Token: SeShutdownPrivilege 2264 CDKeyList.exe Token: SeDebugPrivilege 2264 CDKeyList.exe Token: SeSystemEnvironmentPrivilege 2264 CDKeyList.exe Token: SeChangeNotifyPrivilege 2264 CDKeyList.exe Token: SeRemoteShutdownPrivilege 2264 CDKeyList.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4532 explorer.exe -
Suspicious use of WriteProcessMemory 53 IoCs
description pid Process procid_target PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 5104 1472 CDKServ2.exe 83 PID 1472 wrote to memory of 4532 1472 CDKServ2.exe 85 PID 1472 wrote to memory of 4532 1472 CDKServ2.exe 85 PID 1472 wrote to memory of 4532 1472 CDKServ2.exe 85 PID 1472 wrote to memory of 4532 1472 CDKServ2.exe 85 PID 1472 wrote to memory of 4532 1472 CDKServ2.exe 85 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 4532 wrote to memory of 208 4532 explorer.exe 88 PID 1472 wrote to memory of 2264 1472 CDKServ2.exe 89 PID 1472 wrote to memory of 2264 1472 CDKServ2.exe 89 PID 1472 wrote to memory of 2264 1472 CDKServ2.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\CDKServ2.exe"C:\Users\Admin\AppData\Local\Temp\CDKServ2.exe"1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1472 -
C:\Windows\SysWOW64\notepad.exenotepad2⤵PID:5104
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5104 -s 843⤵
- Program crash
PID:3004
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C:\Windows\SysWOW64\explorer.exe"C:\Windows\SysWOW64\explorer.exe"2⤵
- Checks BIOS information in registry
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4532 -
C:\Windows\SysWOW64\notepad.exeC:\Windows\SysWOW64\notepad.exe3⤵
- System Location Discovery: System Language Discovery
PID:208
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C:\CDKeyList\CDKeyList.exe"C:\CDKeyList\CDKeyList.exe"2⤵
- Checks BIOS information in registry
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:2264
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5104 -ip 51041⤵PID:4340
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
659KB
MD5a495d2d70488d972fd59a131057177b8
SHA15a378bfdd0c0588a6147814a94473c7945221a43
SHA256e96b4b4d335b0ef0fa83b87d278b560dbf0194a7fe30d4fefc1c8733c7769253
SHA5122406d61e68b7edcf7cb941418c9f63270e7e0241b1152b1c69576a086315cb32bf1e1718f79900d8839b648cf16868a52038e3a5488595b770dad22f521cbfc8