Analysis
- max time kernel
150s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
07/03/2024, 10:40
Behavioral task
behavioral1
Sample
b88941407d61d4a039208c3e9ef7c620.exe
Resource
win7-20240221-en
windows7-x64
11 signatures
150 seconds
General
- Target b88941407d61d4a039208c3e9ef7c620.exe
- Size 251KB
- Sample240307-mqvmdaad5s
- SHA256 9b3c3f216155ab683b72ab4062b0a57ee3194e49cc73b1354ebc38f6c4b671ba
- MD5 b88941407d61d4a039208c3e9ef7c620
- SHA1 f02266d031d4db0d610be6df08895299fc72c8be
- SHA512 4a6fd8640ab96a3ea1885f22a5cf39648e14acd3c3a410d3020773ec7503a8c363d88b4ff1ff7333473790eebc78c5da78f98812a798f2e4ab3597ffc1d69a50
- SSDEEP 6144:QcNYk1yuwEDBum3qYWnl0pd0EX3Zq2b6wfIDYm0PHQ:QcWkbgTYWnYnt/IDYhP
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
Family
-
darkcomet
Botnet
-
Guest16
C2
-
127.0.0.1:1604
Mutex
-
DC_MUTEX-Z7L11J7
Attributes
-
InstallPath
MSDCSC\msdcsc.exe
-
gencode
rPFWXHl9UQEN
-
install
true
-
offline_keylogger
true
-
persistence
true
-
reg_key
MicroUpdate
Signatures
- 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:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" b88941407d61d4a039208c3e9ef7c620.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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation b88941407d61d4a039208c3e9ef7c620.exe - Deletes itself 1 IoCs
pid Process 3124 notepad.exe - Executes dropped EXE 1 IoCs
pid Process 1912 msdcsc.exe -
resource yara_rule behavioral2/memory/1136-0-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/files/0x0007000000023202-6.dat upx behavioral2/memory/1136-64-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-66-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-67-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-68-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-69-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-70-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-71-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-72-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-73-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-75-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-76-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-77-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/1912-79-0x0000000000400000-0x00000000004B7000-memory.dmp upx - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" b88941407d61d4a039208c3e9ef7c620.exe Set value (str) \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" msdcsc.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ b88941407d61d4a039208c3e9ef7c620.exe - Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeSecurityPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeTakeOwnershipPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeLoadDriverPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeSystemProfilePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeSystemtimePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeProfSingleProcessPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeIncBasePriorityPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeCreatePagefilePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeBackupPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeRestorePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeShutdownPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeDebugPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeSystemEnvironmentPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeChangeNotifyPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeRemoteShutdownPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeUndockPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeManageVolumePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeImpersonatePrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeCreateGlobalPrivilege 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: 33 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: 34 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: 35 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: 36 1136 b88941407d61d4a039208c3e9ef7c620.exe Token: SeIncreaseQuotaPrivilege 1912 msdcsc.exe Token: SeSecurityPrivilege 1912 msdcsc.exe Token: SeTakeOwnershipPrivilege 1912 msdcsc.exe Token: SeLoadDriverPrivilege 1912 msdcsc.exe Token: SeSystemProfilePrivilege 1912 msdcsc.exe Token: SeSystemtimePrivilege 1912 msdcsc.exe Token: SeProfSingleProcessPrivilege 1912 msdcsc.exe Token: SeIncBasePriorityPrivilege 1912 msdcsc.exe Token: SeCreatePagefilePrivilege 1912 msdcsc.exe Token: SeBackupPrivilege 1912 msdcsc.exe Token: SeRestorePrivilege 1912 msdcsc.exe Token: SeShutdownPrivilege 1912 msdcsc.exe Token: SeDebugPrivilege 1912 msdcsc.exe Token: SeSystemEnvironmentPrivilege 1912 msdcsc.exe Token: SeChangeNotifyPrivilege 1912 msdcsc.exe Token: SeRemoteShutdownPrivilege 1912 msdcsc.exe Token: SeUndockPrivilege 1912 msdcsc.exe Token: SeManageVolumePrivilege 1912 msdcsc.exe Token: SeImpersonatePrivilege 1912 msdcsc.exe Token: SeCreateGlobalPrivilege 1912 msdcsc.exe Token: 33 1912 msdcsc.exe Token: 34 1912 msdcsc.exe Token: 35 1912 msdcsc.exe Token: 36 1912 msdcsc.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1912 msdcsc.exe - Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 3124 1136 b88941407d61d4a039208c3e9ef7c620.exe 90 PID 1136 wrote to memory of 1912 1136 b88941407d61d4a039208c3e9ef7c620.exe 94 PID 1136 wrote to memory of 1912 1136 b88941407d61d4a039208c3e9ef7c620.exe 94 PID 1136 wrote to memory of 1912 1136 b88941407d61d4a039208c3e9ef7c620.exe 94
Processes
-
C:\Users\Admin\AppData\Local\Temp\b88941407d61d4a039208c3e9ef7c620.exe"C:\Users\Admin\AppData\Local\Temp\b88941407d61d4a039208c3e9ef7c620.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1136 -
C:\Windows\SysWOW64\notepad.exenotepad2⤵
- Deletes itself
PID:3124
-
-
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1912
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
- Size 251KB
- SHA256 9b3c3f216155ab683b72ab4062b0a57ee3194e49cc73b1354ebc38f6c4b671ba
- MD5 b88941407d61d4a039208c3e9ef7c620
- SHA1 f02266d031d4db0d610be6df08895299fc72c8be
- SHA512 4a6fd8640ab96a3ea1885f22a5cf39648e14acd3c3a410d3020773ec7503a8c363d88b4ff1ff7333473790eebc78c5da78f98812a798f2e4ab3597ffc1d69a50
- SSDEEP 6144:QcNYk1yuwEDBum3qYWnl0pd0EX3Zq2b6wfIDYm0PHQ:QcWkbgTYWnYnt/IDYhP
- MD5 SHA1 SHA512 SSDEEP