Analysis
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max time kernel
149s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
24-12-2024 16:23
Behavioral task
behavioral1
Sample
eer.scr
Resource
win7-20240903-en
windows7-x64
25 signatures
150 seconds
Behavioral task
behavioral2
Sample
eer.scr
Resource
win10v2004-20241007-en
windows10-2004-x64
24 signatures
150 seconds
General
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Target
eer.scr
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Size
659KB
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MD5
be29e126a2cb27cc281d4504ab88555b
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SHA1
32c2fd591ecc7a42e54c8e4f62eeb4669e343bc9
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SHA256
e24930d91f43b695bc71cbcf0ce9e924f3f83787c29e5671aa412806468f3f30
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SHA512
bb0cbae3105846938a5954cfe089917330ed163c85f9ad19ff73133c3d32e8a5548aaa117cb28c341686b3eae591c7a29737eb706b65a0edc8c1f70fea6d4f02
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SSDEEP
12288:O9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hb:aZ1xuVVjfFoynPaVBUR8f+kN10EBN
Malware Config
Extracted
Family
darkcomet
Botnet
Guest1f63242m
C2
rose324-64643.portmap.host:64643
Mutex
DC_MUTEX-E28WFKY
Attributes
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InstallPath
MSDCSC\msdcsjc.exe
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gencode
AXE6r2QM7fs8
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install
true
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offline_keylogger
true
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persistence
true
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reg_key
reahltekaudio
Signatures
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Darkcomet family
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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:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe" eer.scr -
Modifies firewall policy service 3 TTPs 6 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0" msdcsjc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile iexplore.exe 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 msdcsjc.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" msdcsjc.exe -
Modifies security service 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsjc.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" msdcsjc.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" msdcsjc.exe -
Disables RegEdit via registry modification 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" msdcsjc.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\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 1468 attrib.exe 1224 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation eer.scr -
Deletes itself 1 IoCs
pid Process 3732 notepad.exe -
Executes dropped EXE 1 IoCs
pid Process 3328 msdcsjc.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsjc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" msdcsjc.exe -
Adds Run key to start application 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reahltekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reahltekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe" eer.scr Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reahltekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe" msdcsjc.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3328 set thread context of 2420 3328 msdcsjc.exe 90 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 9 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language attrib.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language msdcsjc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language notepad.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language notepad.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language attrib.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language iexplore.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language eer.scr -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ eer.scr -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2420 iexplore.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 4720 eer.scr Token: SeSecurityPrivilege 4720 eer.scr Token: SeTakeOwnershipPrivilege 4720 eer.scr Token: SeLoadDriverPrivilege 4720 eer.scr Token: SeSystemProfilePrivilege 4720 eer.scr Token: SeSystemtimePrivilege 4720 eer.scr Token: SeProfSingleProcessPrivilege 4720 eer.scr Token: SeIncBasePriorityPrivilege 4720 eer.scr Token: SeCreatePagefilePrivilege 4720 eer.scr Token: SeBackupPrivilege 4720 eer.scr Token: SeRestorePrivilege 4720 eer.scr Token: SeShutdownPrivilege 4720 eer.scr Token: SeDebugPrivilege 4720 eer.scr Token: SeSystemEnvironmentPrivilege 4720 eer.scr Token: SeChangeNotifyPrivilege 4720 eer.scr Token: SeRemoteShutdownPrivilege 4720 eer.scr Token: SeUndockPrivilege 4720 eer.scr Token: SeManageVolumePrivilege 4720 eer.scr Token: SeImpersonatePrivilege 4720 eer.scr Token: SeCreateGlobalPrivilege 4720 eer.scr Token: 33 4720 eer.scr Token: 34 4720 eer.scr Token: 35 4720 eer.scr Token: 36 4720 eer.scr Token: SeIncreaseQuotaPrivilege 3328 msdcsjc.exe Token: SeSecurityPrivilege 3328 msdcsjc.exe Token: SeTakeOwnershipPrivilege 3328 msdcsjc.exe Token: SeLoadDriverPrivilege 3328 msdcsjc.exe Token: SeSystemProfilePrivilege 3328 msdcsjc.exe Token: SeSystemtimePrivilege 3328 msdcsjc.exe Token: SeProfSingleProcessPrivilege 3328 msdcsjc.exe Token: SeIncBasePriorityPrivilege 3328 msdcsjc.exe Token: SeCreatePagefilePrivilege 3328 msdcsjc.exe Token: SeBackupPrivilege 3328 msdcsjc.exe Token: SeRestorePrivilege 3328 msdcsjc.exe Token: SeShutdownPrivilege 3328 msdcsjc.exe Token: SeDebugPrivilege 3328 msdcsjc.exe Token: SeSystemEnvironmentPrivilege 3328 msdcsjc.exe Token: SeChangeNotifyPrivilege 3328 msdcsjc.exe Token: SeRemoteShutdownPrivilege 3328 msdcsjc.exe Token: SeUndockPrivilege 3328 msdcsjc.exe Token: SeManageVolumePrivilege 3328 msdcsjc.exe Token: SeImpersonatePrivilege 3328 msdcsjc.exe Token: SeCreateGlobalPrivilege 3328 msdcsjc.exe Token: 33 3328 msdcsjc.exe Token: 34 3328 msdcsjc.exe Token: 35 3328 msdcsjc.exe Token: 36 3328 msdcsjc.exe Token: SeIncreaseQuotaPrivilege 2420 iexplore.exe Token: SeSecurityPrivilege 2420 iexplore.exe Token: SeTakeOwnershipPrivilege 2420 iexplore.exe Token: SeLoadDriverPrivilege 2420 iexplore.exe Token: SeSystemProfilePrivilege 2420 iexplore.exe Token: SeSystemtimePrivilege 2420 iexplore.exe Token: SeProfSingleProcessPrivilege 2420 iexplore.exe Token: SeIncBasePriorityPrivilege 2420 iexplore.exe Token: SeCreatePagefilePrivilege 2420 iexplore.exe Token: SeBackupPrivilege 2420 iexplore.exe Token: SeRestorePrivilege 2420 iexplore.exe Token: SeShutdownPrivilege 2420 iexplore.exe Token: SeDebugPrivilege 2420 iexplore.exe Token: SeSystemEnvironmentPrivilege 2420 iexplore.exe Token: SeChangeNotifyPrivilege 2420 iexplore.exe Token: SeRemoteShutdownPrivilege 2420 iexplore.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2420 iexplore.exe -
Suspicious use of WriteProcessMemory 59 IoCs
description pid Process procid_target PID 4720 wrote to memory of 2996 4720 eer.scr 82 PID 4720 wrote to memory of 2996 4720 eer.scr 82 PID 4720 wrote to memory of 2996 4720 eer.scr 82 PID 4720 wrote to memory of 2332 4720 eer.scr 84 PID 4720 wrote to memory of 2332 4720 eer.scr 84 PID 4720 wrote to memory of 2332 4720 eer.scr 84 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 4720 wrote to memory of 3732 4720 eer.scr 85 PID 2996 wrote to memory of 1468 2996 cmd.exe 87 PID 2996 wrote to memory of 1468 2996 cmd.exe 87 PID 2996 wrote to memory of 1468 2996 cmd.exe 87 PID 2332 wrote to memory of 1224 2332 cmd.exe 88 PID 2332 wrote to memory of 1224 2332 cmd.exe 88 PID 2332 wrote to memory of 1224 2332 cmd.exe 88 PID 4720 wrote to memory of 3328 4720 eer.scr 89 PID 4720 wrote to memory of 3328 4720 eer.scr 89 PID 4720 wrote to memory of 3328 4720 eer.scr 89 PID 3328 wrote to memory of 2420 3328 msdcsjc.exe 90 PID 3328 wrote to memory of 2420 3328 msdcsjc.exe 90 PID 3328 wrote to memory of 2420 3328 msdcsjc.exe 90 PID 3328 wrote to memory of 2420 3328 msdcsjc.exe 90 PID 3328 wrote to memory of 2420 3328 msdcsjc.exe 90 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 PID 2420 wrote to memory of 532 2420 iexplore.exe 91 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion msdcsjc.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern msdcsjc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1" msdcsjc.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
pid Process 1468 attrib.exe 1224 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\eer.scr"C:\Users\Admin\AppData\Local\Temp\eer.scr" /S1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4720 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\eer.scr" +s +h2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2996 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\eer.scr" +s +h3⤵
- Sets file to hidden
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
PID:1468
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2332 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Sets file to hidden
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
PID:1224
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C:\Windows\SysWOW64\notepad.exenotepad2⤵
- Deletes itself
- System Location Discovery: System Language Discovery
PID:3732
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C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsjc.exe"C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsjc.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3328 -
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
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2420 -
C:\Windows\SysWOW64\notepad.exenotepad4⤵
- System Location Discovery: System Language Discovery
PID:532
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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
2Defense Evasion
Hide Artifacts
2Hidden Files and Directories
2Impair Defenses
3Disable or Modify System Firewall
1Disable or Modify Tools
2Modify Registry
7Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
659KB
MD5be29e126a2cb27cc281d4504ab88555b
SHA132c2fd591ecc7a42e54c8e4f62eeb4669e343bc9
SHA256e24930d91f43b695bc71cbcf0ce9e924f3f83787c29e5671aa412806468f3f30
SHA512bb0cbae3105846938a5954cfe089917330ed163c85f9ad19ff73133c3d32e8a5548aaa117cb28c341686b3eae591c7a29737eb706b65a0edc8c1f70fea6d4f02