Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
20/01/2024, 21:02
Behavioral task
behavioral1
Sample
6b78492169ace001ed943e1c098dbc78.exe
Resource
win7-20231215-en
General
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Target
6b78492169ace001ed943e1c098dbc78.exe
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Size
253KB
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MD5
6b78492169ace001ed943e1c098dbc78
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SHA1
c81c521e28d81be3dd1ea6d9980af29ef79e944c
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SHA256
88695f106560d1c1848111fdcef15e2983f0f0f2c5a8f8957df0cc530783f896
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SHA512
2fcc6591dd012a1d8a6a7d4b145c51ac07e00ffcb7906c9bc42804a19cf287dfa917e166f1b423c3a69e97b70520dd4605024a998e6e7f2c88a06d218f08f920
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SSDEEP
6144:1D7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZ:1l8E4w5huat7UovONzbXw
Malware Config
Extracted
darkcomet
Guest16
:27015
94.243.21.22:27015
DC_MUTEX-3ZYGN23
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InstallPath
MSDCSC\msdcsc.exe
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gencode
Vzb0NGBAb11T
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install
true
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offline_keylogger
false
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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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\MSDCSC\\msdcsc.exe" 6b78492169ace001ed943e1c098dbc78.exe -
Modifies firewall policy service 2 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile msdcsc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" msdcsc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0" msdcsc.exe -
Modifies security service 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsc.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe -
Disables RegEdit via registry modification 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" msdcsc.exe -
Disables Task Manager via registry modification
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Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
pid Process 232 attrib.exe 4968 attrib.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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 6b78492169ace001ed943e1c098dbc78.exe -
Executes dropped EXE 1 IoCs
pid Process 4608 msdcsc.exe -
resource yara_rule behavioral2/memory/2432-0-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/files/0x000600000002321a-6.dat upx behavioral2/memory/2432-63-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-62-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-66-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-68-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-70-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-73-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-75-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral2/memory/4608-77-0x0000000000400000-0x00000000004BA000-memory.dmp upx -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe" 6b78492169ace001ed943e1c098dbc78.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File created C:\Windows\MSDCSC\msdcsc.exe 6b78492169ace001ed943e1c098dbc78.exe File opened for modification C:\Windows\MSDCSC\msdcsc.exe 6b78492169ace001ed943e1c098dbc78.exe File opened for modification C:\Windows\MSDCSC\ 6b78492169ace001ed943e1c098dbc78.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ 6b78492169ace001ed943e1c098dbc78.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4608 msdcsc.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeSecurityPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeTakeOwnershipPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeLoadDriverPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemProfilePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemtimePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeProfSingleProcessPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeIncBasePriorityPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeCreatePagefilePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeBackupPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeRestorePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeShutdownPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeDebugPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemEnvironmentPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeChangeNotifyPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeRemoteShutdownPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeUndockPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeManageVolumePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeImpersonatePrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeCreateGlobalPrivilege 2432 6b78492169ace001ed943e1c098dbc78.exe Token: 33 2432 6b78492169ace001ed943e1c098dbc78.exe Token: 34 2432 6b78492169ace001ed943e1c098dbc78.exe Token: 35 2432 6b78492169ace001ed943e1c098dbc78.exe Token: 36 2432 6b78492169ace001ed943e1c098dbc78.exe Token: SeIncreaseQuotaPrivilege 4608 msdcsc.exe Token: SeSecurityPrivilege 4608 msdcsc.exe Token: SeTakeOwnershipPrivilege 4608 msdcsc.exe Token: SeLoadDriverPrivilege 4608 msdcsc.exe Token: SeSystemProfilePrivilege 4608 msdcsc.exe Token: SeSystemtimePrivilege 4608 msdcsc.exe Token: SeProfSingleProcessPrivilege 4608 msdcsc.exe Token: SeIncBasePriorityPrivilege 4608 msdcsc.exe Token: SeCreatePagefilePrivilege 4608 msdcsc.exe Token: SeBackupPrivilege 4608 msdcsc.exe Token: SeRestorePrivilege 4608 msdcsc.exe Token: SeShutdownPrivilege 4608 msdcsc.exe Token: SeDebugPrivilege 4608 msdcsc.exe Token: SeSystemEnvironmentPrivilege 4608 msdcsc.exe Token: SeChangeNotifyPrivilege 4608 msdcsc.exe Token: SeRemoteShutdownPrivilege 4608 msdcsc.exe Token: SeUndockPrivilege 4608 msdcsc.exe Token: SeManageVolumePrivilege 4608 msdcsc.exe Token: SeImpersonatePrivilege 4608 msdcsc.exe Token: SeCreateGlobalPrivilege 4608 msdcsc.exe Token: 33 4608 msdcsc.exe Token: 34 4608 msdcsc.exe Token: 35 4608 msdcsc.exe Token: 36 4608 msdcsc.exe -
Suspicious use of WriteProcessMemory 42 IoCs
description pid Process procid_target PID 2432 wrote to memory of 2348 2432 6b78492169ace001ed943e1c098dbc78.exe 88 PID 2432 wrote to memory of 2348 2432 6b78492169ace001ed943e1c098dbc78.exe 88 PID 2432 wrote to memory of 2348 2432 6b78492169ace001ed943e1c098dbc78.exe 88 PID 2432 wrote to memory of 1584 2432 6b78492169ace001ed943e1c098dbc78.exe 90 PID 2432 wrote to memory of 1584 2432 6b78492169ace001ed943e1c098dbc78.exe 90 PID 2432 wrote to memory of 1584 2432 6b78492169ace001ed943e1c098dbc78.exe 90 PID 2348 wrote to memory of 232 2348 cmd.exe 92 PID 2348 wrote to memory of 232 2348 cmd.exe 92 PID 2348 wrote to memory of 232 2348 cmd.exe 92 PID 1584 wrote to memory of 4968 1584 cmd.exe 93 PID 1584 wrote to memory of 4968 1584 cmd.exe 93 PID 1584 wrote to memory of 4968 1584 cmd.exe 93 PID 2432 wrote to memory of 4608 2432 6b78492169ace001ed943e1c098dbc78.exe 95 PID 2432 wrote to memory of 4608 2432 6b78492169ace001ed943e1c098dbc78.exe 95 PID 2432 wrote to memory of 4608 2432 6b78492169ace001ed943e1c098dbc78.exe 95 PID 4608 wrote to memory of 4724 4608 msdcsc.exe 96 PID 4608 wrote to memory of 4724 4608 msdcsc.exe 96 PID 4608 wrote to memory of 4724 4608 msdcsc.exe 96 PID 4608 wrote to memory of 1824 4608 msdcsc.exe 97 PID 4608 wrote to memory of 1824 4608 msdcsc.exe 97 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 PID 4608 wrote to memory of 4388 4608 msdcsc.exe 98 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion msdcsc.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1" msdcsc.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
pid Process 4968 attrib.exe 232 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\6b78492169ace001ed943e1c098dbc78.exe"C:\Users\Admin\AppData\Local\Temp\6b78492169ace001ed943e1c098dbc78.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2432 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\6b78492169ace001ed943e1c098dbc78.exe" +s +h2⤵
- Suspicious use of WriteProcessMemory
PID:2348 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\6b78492169ace001ed943e1c098dbc78.exe" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:232
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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
PID:1584 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4968
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C:\Windows\MSDCSC\msdcsc.exe"C:\Windows\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4608 -
C:\Program Files (x86)\Internet Explorer\iexplore.exe"C:\Program Files (x86)\Internet Explorer\iexplore.exe"3⤵PID:4724
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C:\Windows\explorer.exe"C:\Windows\explorer.exe"3⤵PID:1824
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C:\Windows\SysWOW64\notepad.exenotepad3⤵PID:4388
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Replay Monitor
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Downloads
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Filesize
253KB
MD56b78492169ace001ed943e1c098dbc78
SHA1c81c521e28d81be3dd1ea6d9980af29ef79e944c
SHA25688695f106560d1c1848111fdcef15e2983f0f0f2c5a8f8957df0cc530783f896
SHA5122fcc6591dd012a1d8a6a7d4b145c51ac07e00ffcb7906c9bc42804a19cf287dfa917e166f1b423c3a69e97b70520dd4605024a998e6e7f2c88a06d218f08f920