Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
16-05-2021 02:10
Behavioral task
behavioral1
Sample
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe
Resource
win7v20210410
General
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Target
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe
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Size
658KB
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MD5
e6d7561303a87d68dda8787b5f5b8eda
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SHA1
54ac1069a6b0002240e144fa8f3011982f536649
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SHA256
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed
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SHA512
5017d317a5c8bd59f60bd1217e3b51ca936b02b2c8be511ad1638869aebe5f17d21d905890d8af7ed8de24f56c88bd24a33a271bf15105bb7cc507aa2119f77c
Malware Config
Extracted
darkcomet
Guest16
emrefsjd42.duckdns.org:1604
DC_MUTEX-EDRQF35
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InstallPath
MSDCSC\msdcsc.exe
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gencode
zoNXPXjuLVxX
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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
MicroUpdate
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe -
Modifies firewall policy service 2 TTPs 3 IoCs
Processes:
msdcsc.exedescription ioc process 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 msdcsc.exe -
Modifies security service 2 TTPs 1 IoCs
Processes:
msdcsc.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsc.exe -
Disables RegEdit via registry modification
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Disables Task Manager via registry modification
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Executes dropped EXE 1 IoCs
Processes:
msdcsc.exepid process 336 msdcsc.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\International\Geo\Nation 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe -
Deletes itself 1 IoCs
Processes:
notepad.exepid process 1840 notepad.exe -
Processes:
msdcsc.exedescription 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 2 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exemsdcsc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe" msdcsc.exe -
Drops file in System32 directory 3 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exedescription ioc process File created C:\Windows\SysWOW64\MSDCSC\msdcsc.exe 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe File opened for modification C:\Windows\SysWOW64\MSDCSC\msdcsc.exe 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe File opened for modification C:\Windows\SysWOW64\MSDCSC\ 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 1 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
msdcsc.exepid process 336 msdcsc.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exemsdcsc.exedescription pid process Token: SeIncreaseQuotaPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeSecurityPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeTakeOwnershipPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeLoadDriverPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeSystemProfilePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeSystemtimePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeProfSingleProcessPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeIncBasePriorityPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeCreatePagefilePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeBackupPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeRestorePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeShutdownPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeDebugPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeSystemEnvironmentPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeChangeNotifyPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeRemoteShutdownPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeUndockPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeManageVolumePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeImpersonatePrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeCreateGlobalPrivilege 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: 33 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: 34 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: 35 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: 36 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe Token: SeIncreaseQuotaPrivilege 336 msdcsc.exe Token: SeSecurityPrivilege 336 msdcsc.exe Token: SeTakeOwnershipPrivilege 336 msdcsc.exe Token: SeLoadDriverPrivilege 336 msdcsc.exe Token: SeSystemProfilePrivilege 336 msdcsc.exe Token: SeSystemtimePrivilege 336 msdcsc.exe Token: SeProfSingleProcessPrivilege 336 msdcsc.exe Token: SeIncBasePriorityPrivilege 336 msdcsc.exe Token: SeCreatePagefilePrivilege 336 msdcsc.exe Token: SeBackupPrivilege 336 msdcsc.exe Token: SeRestorePrivilege 336 msdcsc.exe Token: SeShutdownPrivilege 336 msdcsc.exe Token: SeDebugPrivilege 336 msdcsc.exe Token: SeSystemEnvironmentPrivilege 336 msdcsc.exe Token: SeChangeNotifyPrivilege 336 msdcsc.exe Token: SeRemoteShutdownPrivilege 336 msdcsc.exe Token: SeUndockPrivilege 336 msdcsc.exe Token: SeManageVolumePrivilege 336 msdcsc.exe Token: SeImpersonatePrivilege 336 msdcsc.exe Token: SeCreateGlobalPrivilege 336 msdcsc.exe Token: 33 336 msdcsc.exe Token: 34 336 msdcsc.exe Token: 35 336 msdcsc.exe Token: 36 336 msdcsc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
msdcsc.exepid process 336 msdcsc.exe -
Suspicious use of WriteProcessMemory 54 IoCs
Processes:
6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.execmd.execmd.exemsdcsc.exedescription pid process target process PID 3872 wrote to memory of 1676 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1676 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1676 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1800 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1800 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1800 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe cmd.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 3872 wrote to memory of 1840 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe notepad.exe PID 1676 wrote to memory of 2856 1676 cmd.exe attrib.exe PID 1676 wrote to memory of 2856 1676 cmd.exe attrib.exe PID 1676 wrote to memory of 2856 1676 cmd.exe attrib.exe PID 3872 wrote to memory of 336 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe msdcsc.exe PID 3872 wrote to memory of 336 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe msdcsc.exe PID 3872 wrote to memory of 336 3872 6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe msdcsc.exe PID 1800 wrote to memory of 3456 1800 cmd.exe attrib.exe PID 1800 wrote to memory of 3456 1800 cmd.exe attrib.exe PID 1800 wrote to memory of 3456 1800 cmd.exe attrib.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe PID 336 wrote to memory of 3504 336 msdcsc.exe notepad.exe -
System policy modification 1 TTPs 3 IoCs
Processes:
msdcsc.exedescription 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
Processes:
attrib.exeattrib.exepid process 2856 attrib.exe 3456 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe"C:\Users\Admin\AppData\Local\Temp\6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- 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\6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe" +s +h2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\6c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed.exe" +s +h3⤵
- Views/modifies file attributes
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C:\Windows\SysWOW64\notepad.exenotepad2⤵
- Deletes itself
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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⤵
- Views/modifies file attributes
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C:\Windows\SysWOW64\MSDCSC\msdcsc.exe"C:\Windows\system32\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\SysWOW64\notepad.exenotepad3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Windows\SysWOW64\MSDCSC\msdcsc.exeMD5
e6d7561303a87d68dda8787b5f5b8eda
SHA154ac1069a6b0002240e144fa8f3011982f536649
SHA2566c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed
SHA5125017d317a5c8bd59f60bd1217e3b51ca936b02b2c8be511ad1638869aebe5f17d21d905890d8af7ed8de24f56c88bd24a33a271bf15105bb7cc507aa2119f77c
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C:\Windows\SysWOW64\MSDCSC\msdcsc.exeMD5
e6d7561303a87d68dda8787b5f5b8eda
SHA154ac1069a6b0002240e144fa8f3011982f536649
SHA2566c445d3e373a83dc67c97af5e55948b974902f6b1d6926b5c391dfd477765eed
SHA5125017d317a5c8bd59f60bd1217e3b51ca936b02b2c8be511ad1638869aebe5f17d21d905890d8af7ed8de24f56c88bd24a33a271bf15105bb7cc507aa2119f77c
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memory/336-125-0x0000000000740000-0x0000000000741000-memory.dmpFilesize
4KB
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memory/336-120-0x0000000000000000-mapping.dmp
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memory/1676-114-0x0000000000000000-mapping.dmp
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memory/1800-115-0x0000000000000000-mapping.dmp
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memory/1840-116-0x0000000000000000-mapping.dmp
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memory/1840-118-0x00000000030F0000-0x00000000030F1000-memory.dmpFilesize
4KB
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memory/2856-119-0x0000000000000000-mapping.dmp
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memory/3456-123-0x0000000000000000-mapping.dmp
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memory/3504-124-0x0000000000000000-mapping.dmp
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memory/3504-126-0x00000000006C0000-0x00000000006C1000-memory.dmpFilesize
4KB
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memory/3872-117-0x00000000022F0000-0x00000000022F1000-memory.dmpFilesize
4KB