Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11-04-2024 15:45
Behavioral task
behavioral1
Sample
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe
Resource
win7-20240221-en
General
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Target
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe
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Size
663KB
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MD5
8231d8d9d1c38a7f2ebce20944bcfc63
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SHA1
ca190e6cab231bd140dab3a13c7a59cb88c85e7b
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SHA256
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8
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SHA512
8025a7c2231a562bf4d0ff76a813585606462a51a1b76a34d54f0640b4f591d8abdc32928795162f987f6dfd42f16e10c340f27a62ad87b18cec81bdb9a68cc2
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SSDEEP
12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9EkNC/:KZ1xuVVjfFoynPaVBUR8f+kN10Ed
Malware Config
Extracted
darkcomet
Guest16
80.222.152.67:80
DC_MUTEX-QWMWN2U
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InstallPath
MSDCSC\msdcsc.exe
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gencode
hdQRh37piHv1
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install
true
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offline_keylogger
true
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persistence
false
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reg_key
MicroUpdate
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exedescription 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" 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe -
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
Processes:
attrib.exeattrib.exepid process 2324 attrib.exe 5100 attrib.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe -
Executes dropped EXE 1 IoCs
Processes:
msdcsc.exepid process 4888 msdcsc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe" 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exemsdcsc.exedescription pid process Token: SeIncreaseQuotaPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSecurityPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeTakeOwnershipPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeLoadDriverPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemProfilePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemtimePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeProfSingleProcessPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeIncBasePriorityPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeCreatePagefilePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeBackupPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeRestorePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeShutdownPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeDebugPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemEnvironmentPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeChangeNotifyPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeRemoteShutdownPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeUndockPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeManageVolumePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeImpersonatePrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeCreateGlobalPrivilege 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 33 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 34 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 35 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 36 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeIncreaseQuotaPrivilege 4888 msdcsc.exe Token: SeSecurityPrivilege 4888 msdcsc.exe Token: SeTakeOwnershipPrivilege 4888 msdcsc.exe Token: SeLoadDriverPrivilege 4888 msdcsc.exe Token: SeSystemProfilePrivilege 4888 msdcsc.exe Token: SeSystemtimePrivilege 4888 msdcsc.exe Token: SeProfSingleProcessPrivilege 4888 msdcsc.exe Token: SeIncBasePriorityPrivilege 4888 msdcsc.exe Token: SeCreatePagefilePrivilege 4888 msdcsc.exe Token: SeBackupPrivilege 4888 msdcsc.exe Token: SeRestorePrivilege 4888 msdcsc.exe Token: SeShutdownPrivilege 4888 msdcsc.exe Token: SeDebugPrivilege 4888 msdcsc.exe Token: SeSystemEnvironmentPrivilege 4888 msdcsc.exe Token: SeChangeNotifyPrivilege 4888 msdcsc.exe Token: SeRemoteShutdownPrivilege 4888 msdcsc.exe Token: SeUndockPrivilege 4888 msdcsc.exe Token: SeManageVolumePrivilege 4888 msdcsc.exe Token: SeImpersonatePrivilege 4888 msdcsc.exe Token: SeCreateGlobalPrivilege 4888 msdcsc.exe Token: 33 4888 msdcsc.exe Token: 34 4888 msdcsc.exe Token: 35 4888 msdcsc.exe Token: 36 4888 msdcsc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
msdcsc.exepid process 4888 msdcsc.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.execmd.execmd.exedescription pid process target process PID 2336 wrote to memory of 4992 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4992 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4992 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4504 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4504 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4504 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2336 wrote to memory of 4888 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 2336 wrote to memory of 4888 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 2336 wrote to memory of 4888 2336 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 4992 wrote to memory of 2324 4992 cmd.exe attrib.exe PID 4992 wrote to memory of 2324 4992 cmd.exe attrib.exe PID 4992 wrote to memory of 2324 4992 cmd.exe attrib.exe PID 4504 wrote to memory of 5100 4504 cmd.exe attrib.exe PID 4504 wrote to memory of 5100 4504 cmd.exe attrib.exe PID 4504 wrote to memory of 5100 4504 cmd.exe attrib.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
Processes:
attrib.exeattrib.exepid process 2324 attrib.exe 5100 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe"C:\Users\Admin\AppData\Local\Temp\77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2336 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe" +s +h2⤵
- Suspicious use of WriteProcessMemory
PID:4992 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2324 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h2⤵
- Suspicious use of WriteProcessMemory
PID:4504 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:5100 -
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4888
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
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Downloads
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C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exeFilesize
663KB
MD58231d8d9d1c38a7f2ebce20944bcfc63
SHA1ca190e6cab231bd140dab3a13c7a59cb88c85e7b
SHA25677058147d37749df7378249a128a5298de49787eba629b634090849456774ce8
SHA5128025a7c2231a562bf4d0ff76a813585606462a51a1b76a34d54f0640b4f591d8abdc32928795162f987f6dfd42f16e10c340f27a62ad87b18cec81bdb9a68cc2
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memory/2336-0-0x0000000000B10000-0x0000000000B11000-memory.dmpFilesize
4KB
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memory/2336-14-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB
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memory/4888-13-0x0000000000B00000-0x0000000000B01000-memory.dmpFilesize
4KB
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memory/4888-15-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB
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memory/4888-17-0x0000000000B00000-0x0000000000B01000-memory.dmpFilesize
4KB
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memory/4888-18-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB