Analysis
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max time kernel
121s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 6 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" iexplore.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0" iexplore.exe 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 Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile iexplore.exe -
Modifies security service 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" msdcsc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" iexplore.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" iexplore.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" iexplore.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe -
Disables RegEdit via registry modification 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" msdcsc.exe Set value (int) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" iexplore.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 2812 attrib.exe 2832 attrib.exe -
Executes dropped EXE 1 IoCs
pid Process 2844 msdcsc.exe -
Loads dropped DLL 2 IoCs
pid Process 2672 6b78492169ace001ed943e1c098dbc78.exe 2672 6b78492169ace001ed943e1c098dbc78.exe -
resource yara_rule behavioral1/memory/2672-0-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/files/0x000c000000014122-11.dat upx behavioral1/memory/2672-12-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/memory/2844-13-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/memory/2628-16-0x0000000000400000-0x00000000004BA000-memory.dmp upx behavioral1/memory/2844-17-0x0000000000400000-0x00000000004BA000-memory.dmp upx -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe" 6b78492169ace001ed943e1c098dbc78.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2844 set thread context of 2628 2844 msdcsc.exe 35 -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\MSDCSC\msdcsc.exe 6b78492169ace001ed943e1c098dbc78.exe File opened for modification C:\Windows\MSDCSC\ 6b78492169ace001ed943e1c098dbc78.exe File created C:\Windows\MSDCSC\msdcsc.exe 6b78492169ace001ed943e1c098dbc78.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeSecurityPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeTakeOwnershipPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeLoadDriverPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemProfilePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemtimePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeProfSingleProcessPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeIncBasePriorityPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeCreatePagefilePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeBackupPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeRestorePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeShutdownPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeDebugPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeSystemEnvironmentPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeChangeNotifyPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeRemoteShutdownPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeUndockPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeManageVolumePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeImpersonatePrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeCreateGlobalPrivilege 2672 6b78492169ace001ed943e1c098dbc78.exe Token: 33 2672 6b78492169ace001ed943e1c098dbc78.exe Token: 34 2672 6b78492169ace001ed943e1c098dbc78.exe Token: 35 2672 6b78492169ace001ed943e1c098dbc78.exe Token: SeIncreaseQuotaPrivilege 2844 msdcsc.exe Token: SeSecurityPrivilege 2844 msdcsc.exe Token: SeTakeOwnershipPrivilege 2844 msdcsc.exe Token: SeLoadDriverPrivilege 2844 msdcsc.exe Token: SeSystemProfilePrivilege 2844 msdcsc.exe Token: SeSystemtimePrivilege 2844 msdcsc.exe Token: SeProfSingleProcessPrivilege 2844 msdcsc.exe Token: SeIncBasePriorityPrivilege 2844 msdcsc.exe Token: SeCreatePagefilePrivilege 2844 msdcsc.exe Token: SeBackupPrivilege 2844 msdcsc.exe Token: SeRestorePrivilege 2844 msdcsc.exe Token: SeShutdownPrivilege 2844 msdcsc.exe Token: SeDebugPrivilege 2844 msdcsc.exe Token: SeSystemEnvironmentPrivilege 2844 msdcsc.exe Token: SeChangeNotifyPrivilege 2844 msdcsc.exe Token: SeRemoteShutdownPrivilege 2844 msdcsc.exe Token: SeUndockPrivilege 2844 msdcsc.exe Token: SeManageVolumePrivilege 2844 msdcsc.exe Token: SeImpersonatePrivilege 2844 msdcsc.exe Token: SeCreateGlobalPrivilege 2844 msdcsc.exe Token: 33 2844 msdcsc.exe Token: 34 2844 msdcsc.exe Token: 35 2844 msdcsc.exe Token: SeIncreaseQuotaPrivilege 2628 iexplore.exe Token: SeSecurityPrivilege 2628 iexplore.exe Token: SeTakeOwnershipPrivilege 2628 iexplore.exe Token: SeLoadDriverPrivilege 2628 iexplore.exe Token: SeSystemProfilePrivilege 2628 iexplore.exe Token: SeSystemtimePrivilege 2628 iexplore.exe Token: SeProfSingleProcessPrivilege 2628 iexplore.exe Token: SeIncBasePriorityPrivilege 2628 iexplore.exe Token: SeCreatePagefilePrivilege 2628 iexplore.exe Token: SeBackupPrivilege 2628 iexplore.exe Token: SeRestorePrivilege 2628 iexplore.exe Token: SeShutdownPrivilege 2628 iexplore.exe Token: SeDebugPrivilege 2628 iexplore.exe Token: SeSystemEnvironmentPrivilege 2628 iexplore.exe Token: SeChangeNotifyPrivilege 2628 iexplore.exe Token: SeRemoteShutdownPrivilege 2628 iexplore.exe Token: SeUndockPrivilege 2628 iexplore.exe Token: SeManageVolumePrivilege 2628 iexplore.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2672 wrote to memory of 2164 2672 6b78492169ace001ed943e1c098dbc78.exe 28 PID 2672 wrote to memory of 2164 2672 6b78492169ace001ed943e1c098dbc78.exe 28 PID 2672 wrote to memory of 2164 2672 6b78492169ace001ed943e1c098dbc78.exe 28 PID 2672 wrote to memory of 2164 2672 6b78492169ace001ed943e1c098dbc78.exe 28 PID 2672 wrote to memory of 2680 2672 6b78492169ace001ed943e1c098dbc78.exe 29 PID 2672 wrote to memory of 2680 2672 6b78492169ace001ed943e1c098dbc78.exe 29 PID 2672 wrote to memory of 2680 2672 6b78492169ace001ed943e1c098dbc78.exe 29 PID 2672 wrote to memory of 2680 2672 6b78492169ace001ed943e1c098dbc78.exe 29 PID 2680 wrote to memory of 2812 2680 cmd.exe 32 PID 2680 wrote to memory of 2812 2680 cmd.exe 32 PID 2680 wrote to memory of 2812 2680 cmd.exe 32 PID 2680 wrote to memory of 2812 2680 cmd.exe 32 PID 2164 wrote to memory of 2832 2164 cmd.exe 33 PID 2164 wrote to memory of 2832 2164 cmd.exe 33 PID 2164 wrote to memory of 2832 2164 cmd.exe 33 PID 2164 wrote to memory of 2832 2164 cmd.exe 33 PID 2672 wrote to memory of 2844 2672 6b78492169ace001ed943e1c098dbc78.exe 34 PID 2672 wrote to memory of 2844 2672 6b78492169ace001ed943e1c098dbc78.exe 34 PID 2672 wrote to memory of 2844 2672 6b78492169ace001ed943e1c098dbc78.exe 34 PID 2672 wrote to memory of 2844 2672 6b78492169ace001ed943e1c098dbc78.exe 34 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 PID 2844 wrote to memory of 2628 2844 msdcsc.exe 35 -
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 2812 attrib.exe 2832 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
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2672 -
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:2164 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\6b78492169ace001ed943e1c098dbc78.exe" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2832
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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:2680 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2812
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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 use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2844 -
C:\Program Files (x86)\Internet Explorer\iexplore.exe"C:\Program Files (x86)\Internet Explorer\iexplore.exe"3⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Suspicious use of AdjustPrivilegeToken
PID:2628
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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