Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
13-04-2024 01:27
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 3284 attrib.exe 3140 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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe -
Executes dropped EXE 1 IoCs
Processes:
msdcsc.exepid process 2620 msdcsc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\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 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSecurityPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeTakeOwnershipPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeLoadDriverPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemProfilePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemtimePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeProfSingleProcessPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeIncBasePriorityPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeCreatePagefilePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeBackupPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeRestorePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeShutdownPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeDebugPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeSystemEnvironmentPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeChangeNotifyPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeRemoteShutdownPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeUndockPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeManageVolumePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeImpersonatePrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeCreateGlobalPrivilege 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 33 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 34 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 35 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: 36 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe Token: SeIncreaseQuotaPrivilege 2620 msdcsc.exe Token: SeSecurityPrivilege 2620 msdcsc.exe Token: SeTakeOwnershipPrivilege 2620 msdcsc.exe Token: SeLoadDriverPrivilege 2620 msdcsc.exe Token: SeSystemProfilePrivilege 2620 msdcsc.exe Token: SeSystemtimePrivilege 2620 msdcsc.exe Token: SeProfSingleProcessPrivilege 2620 msdcsc.exe Token: SeIncBasePriorityPrivilege 2620 msdcsc.exe Token: SeCreatePagefilePrivilege 2620 msdcsc.exe Token: SeBackupPrivilege 2620 msdcsc.exe Token: SeRestorePrivilege 2620 msdcsc.exe Token: SeShutdownPrivilege 2620 msdcsc.exe Token: SeDebugPrivilege 2620 msdcsc.exe Token: SeSystemEnvironmentPrivilege 2620 msdcsc.exe Token: SeChangeNotifyPrivilege 2620 msdcsc.exe Token: SeRemoteShutdownPrivilege 2620 msdcsc.exe Token: SeUndockPrivilege 2620 msdcsc.exe Token: SeManageVolumePrivilege 2620 msdcsc.exe Token: SeImpersonatePrivilege 2620 msdcsc.exe Token: SeCreateGlobalPrivilege 2620 msdcsc.exe Token: 33 2620 msdcsc.exe Token: 34 2620 msdcsc.exe Token: 35 2620 msdcsc.exe Token: 36 2620 msdcsc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
msdcsc.exepid process 2620 msdcsc.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.execmd.execmd.exedescription pid process target process PID 2168 wrote to memory of 4540 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 4540 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 4540 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 1960 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 1960 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 1960 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe cmd.exe PID 2168 wrote to memory of 2620 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 2168 wrote to memory of 2620 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 2168 wrote to memory of 2620 2168 77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe msdcsc.exe PID 4540 wrote to memory of 3284 4540 cmd.exe attrib.exe PID 4540 wrote to memory of 3284 4540 cmd.exe attrib.exe PID 4540 wrote to memory of 3284 4540 cmd.exe attrib.exe PID 1960 wrote to memory of 3140 1960 cmd.exe attrib.exe PID 1960 wrote to memory of 3140 1960 cmd.exe attrib.exe PID 1960 wrote to memory of 3140 1960 cmd.exe attrib.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
Processes:
attrib.exeattrib.exepid process 3284 attrib.exe 3140 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
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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
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\77058147d37749df7378249a128a5298de49787eba629b634090849456774ce8.exe" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
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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
Network
MITRE ATT&CK Matrix ATT&CK v13
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/2168-0-0x00000000009D0000-0x00000000009D1000-memory.dmpFilesize
4KB
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memory/2168-14-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB
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memory/2620-13-0x0000000002710000-0x0000000002711000-memory.dmpFilesize
4KB
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memory/2620-15-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB
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memory/2620-17-0x0000000000400000-0x00000000004B3000-memory.dmpFilesize
716KB