Analysis
- max time kernel
151s - max time network
145s - platform
windows7_x64 - resource
win7v20201028 - submitted
08/01/2021, 06:55
Static task
static1
Behavioral task
behavioral1
Sample
f.bin.exe
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
General
- Target f.bin.exe
- Size 658KB
- Sample210108-rl53n3fa7e
- SHA256 1c876d45db060f5be86ab9a13496c0b280d3c6031f00bb4ffebae99566a9249b
- MD5 3b6f11e1bfcb6137f555399ce5e5fec6
- SHA1 dbfe47ed7e9842b0a9014c11b7146c38963882c5
- SHA512 6d6b338a395cc42d527cee0dd06f051b86e7d135b764c6d7619eae0a9dba0e687e0578ff64d83ac7284fea1e727a6695a7e3d065e86d45b01cb81befeab89715
- MD5 SHA1 SHA512
Malware Config
Extracted
Family
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darkcomet
Botnet
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Guest16
C2
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ImagineTyingToGetMyIp-31268.portmap.host:31268
Mutex
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DC_MUTEX-B1A8DEL
Attributes
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InstallPath
MSDCSC\msdcsc.exe
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gencode
ZyDv1EUeB9PM
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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
- 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:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" f.bin.exe - Executes dropped EXE 1 IoCs
pid Process 932 msdcsc.exe - Loads dropped DLL 2 IoCs
pid Process 1972 f.bin.exe 1972 f.bin.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" msdcsc.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" f.bin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" msdcsc.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of AdjustPrivilegeToken 46 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 1972 f.bin.exe Token: SeSecurityPrivilege 1972 f.bin.exe Token: SeTakeOwnershipPrivilege 1972 f.bin.exe Token: SeLoadDriverPrivilege 1972 f.bin.exe Token: SeSystemProfilePrivilege 1972 f.bin.exe Token: SeSystemtimePrivilege 1972 f.bin.exe Token: SeProfSingleProcessPrivilege 1972 f.bin.exe Token: SeIncBasePriorityPrivilege 1972 f.bin.exe Token: SeCreatePagefilePrivilege 1972 f.bin.exe Token: SeBackupPrivilege 1972 f.bin.exe Token: SeRestorePrivilege 1972 f.bin.exe Token: SeShutdownPrivilege 1972 f.bin.exe Token: SeDebugPrivilege 1972 f.bin.exe Token: SeSystemEnvironmentPrivilege 1972 f.bin.exe Token: SeChangeNotifyPrivilege 1972 f.bin.exe Token: SeRemoteShutdownPrivilege 1972 f.bin.exe Token: SeUndockPrivilege 1972 f.bin.exe Token: SeManageVolumePrivilege 1972 f.bin.exe Token: SeImpersonatePrivilege 1972 f.bin.exe Token: SeCreateGlobalPrivilege 1972 f.bin.exe Token: 33 1972 f.bin.exe Token: 34 1972 f.bin.exe Token: 35 1972 f.bin.exe Token: SeIncreaseQuotaPrivilege 932 msdcsc.exe Token: SeSecurityPrivilege 932 msdcsc.exe Token: SeTakeOwnershipPrivilege 932 msdcsc.exe Token: SeLoadDriverPrivilege 932 msdcsc.exe Token: SeSystemProfilePrivilege 932 msdcsc.exe Token: SeSystemtimePrivilege 932 msdcsc.exe Token: SeProfSingleProcessPrivilege 932 msdcsc.exe Token: SeIncBasePriorityPrivilege 932 msdcsc.exe Token: SeCreatePagefilePrivilege 932 msdcsc.exe Token: SeBackupPrivilege 932 msdcsc.exe Token: SeRestorePrivilege 932 msdcsc.exe Token: SeShutdownPrivilege 932 msdcsc.exe Token: SeDebugPrivilege 932 msdcsc.exe Token: SeSystemEnvironmentPrivilege 932 msdcsc.exe Token: SeChangeNotifyPrivilege 932 msdcsc.exe Token: SeRemoteShutdownPrivilege 932 msdcsc.exe Token: SeUndockPrivilege 932 msdcsc.exe Token: SeManageVolumePrivilege 932 msdcsc.exe Token: SeImpersonatePrivilege 932 msdcsc.exe Token: SeCreateGlobalPrivilege 932 msdcsc.exe Token: 33 932 msdcsc.exe Token: 34 932 msdcsc.exe Token: 35 932 msdcsc.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 932 msdcsc.exe - Suspicious use of WriteProcessMemory 43 IoCs
description pid Process procid_target PID 1972 wrote to memory of 1804 1972 f.bin.exe 29 PID 1972 wrote to memory of 1804 1972 f.bin.exe 29 PID 1972 wrote to memory of 1804 1972 f.bin.exe 29 PID 1972 wrote to memory of 1804 1972 f.bin.exe 29 PID 1972 wrote to memory of 1800 1972 f.bin.exe 31 PID 1972 wrote to memory of 1800 1972 f.bin.exe 31 PID 1972 wrote to memory of 1800 1972 f.bin.exe 31 PID 1972 wrote to memory of 1800 1972 f.bin.exe 31 PID 1804 wrote to memory of 1728 1804 cmd.exe 33 PID 1804 wrote to memory of 1728 1804 cmd.exe 33 PID 1804 wrote to memory of 1728 1804 cmd.exe 33 PID 1804 wrote to memory of 1728 1804 cmd.exe 33 PID 1800 wrote to memory of 1600 1800 cmd.exe 34 PID 1800 wrote to memory of 1600 1800 cmd.exe 34 PID 1800 wrote to memory of 1600 1800 cmd.exe 34 PID 1800 wrote to memory of 1600 1800 cmd.exe 34 PID 1972 wrote to memory of 932 1972 f.bin.exe 35 PID 1972 wrote to memory of 932 1972 f.bin.exe 35 PID 1972 wrote to memory of 932 1972 f.bin.exe 35 PID 1972 wrote to memory of 932 1972 f.bin.exe 35 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 PID 932 wrote to memory of 1212 932 msdcsc.exe 36 - Views/modifies file attributes 1 TTPs 2 IoCs
pid Process 1728 attrib.exe 1600 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f.bin.exe"C:\Users\Admin\AppData\Local\Temp\f.bin.exe"1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\f.bin.exe" +s +h2⤵
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp\f.bin.exe" +s +h3⤵
- Views/modifies file attributes
PID:1728
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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:1800 -
C:\Windows\SysWOW64\attrib.exeattrib "C:\Users\Admin\AppData\Local\Temp" +s +h3⤵
- Views/modifies file attributes
PID:1600
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C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:932 -
C:\Windows\SysWOW64\notepad.exenotepad3⤵PID:1212
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