Analysis
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max time kernel
194s -
max time network
36s -
platform
windows7_x64 -
resource
win7 -
submitted
01-10-2020 14:24
Static task
static1
Behavioral task
behavioral1
Sample
run.bat
Resource
win7
Behavioral task
behavioral2
Sample
run.bat
Resource
win10v200722
General
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Target
run.bat
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Size
74B
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MD5
387c29a2241aa206352b4154de2cfb3a
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SHA1
4d8140bafa23fe50bb8cd8048451c6e5a0c81a13
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SHA256
1577af8f986faa067ba9a0a9a90c445a110bd05f23936962432e0fba5d7d53f6
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SHA512
20a2870e70227534e2d0f5234443a1ee5511f201a05fcb0d57fefddf24d2e1faa03864114798c98c4161a30df576445ccec4b8e5eab3788d043889836d8b99dc
Malware Config
Extracted
C:\RECOVER-FILES.txt
sekhmet
http://o3n4bhhtybbtwqqs.onion/735A8A41D889C83A
https://sekhmet.top/735A8A41D889C83A
Signatures
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Sekhmet Ransomware
Ransomware family active in the wild since early 2020.
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Modifies extensions of user files 9 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc Process File renamed C:\Users\Admin\Pictures\OutRevoke.tif => C:\Users\Admin\Pictures\OutRevoke.tif.YKeygF regsvr32.exe File opened for modification C:\Users\Admin\Pictures\ProtectMerge.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\ProtectMerge.tiff => C:\Users\Admin\Pictures\ProtectMerge.tiff.YKeygF regsvr32.exe File renamed C:\Users\Admin\Pictures\ResumeTrace.raw => C:\Users\Admin\Pictures\ResumeTrace.raw.kSAK regsvr32.exe File renamed C:\Users\Admin\Pictures\AssertHide.raw => C:\Users\Admin\Pictures\AssertHide.raw.bIoRBS regsvr32.exe File renamed C:\Users\Admin\Pictures\ExportReset.tif => C:\Users\Admin\Pictures\ExportReset.tif.pEHo regsvr32.exe File renamed C:\Users\Admin\Pictures\StepRequest.raw => C:\Users\Admin\Pictures\StepRequest.raw.kSAK regsvr32.exe File renamed C:\Users\Admin\Pictures\DenyRevoke.crw => C:\Users\Admin\Pictures\DenyRevoke.crw.bIoRBS regsvr32.exe File renamed C:\Users\Admin\Pictures\StartEnable.raw => C:\Users\Admin\Pictures\StartEnable.raw.kSAK regsvr32.exe -
Drops startup file 4 IoCs
Processes:
regsvr32.exedescription ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e6189640.lnk regsvr32.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RECOVER-FILES.txt regsvr32.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\e6189640.lnk regsvr32.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\RECOVER-FILES.txt regsvr32.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Modifies service 2 TTPs 5 IoCs
Processes:
vssvc.exedescription ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5} vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer vssvc.exe -
Drops file in Program Files directory 10 IoCs
Processes:
regsvr32.exedescription ioc Process File created C:\Program Files\Microsoft SQL Server Compact Edition\e6189640.lnk regsvr32.exe File created C:\Program Files\Microsoft SQL Server Compact Edition\v3.5\e6189640.lnk regsvr32.exe File created C:\Program Files\Microsoft SQL Server Compact Edition\v3.5\RECOVER-FILES.txt regsvr32.exe File created C:\Program Files\Microsoft SQL Server Compact Edition\v3.5\Desktop\e6189640.lnk regsvr32.exe File created C:\Program Files (x86)\e6189640.lnk regsvr32.exe File created C:\Program Files (x86)\RECOVER-FILES.txt regsvr32.exe File created C:\Program Files\e6189640.lnk regsvr32.exe File created C:\Program Files\RECOVER-FILES.txt regsvr32.exe File created C:\Program Files\Microsoft SQL Server Compact Edition\RECOVER-FILES.txt regsvr32.exe File created C:\Program Files\Microsoft SQL Server Compact Edition\v3.5\Desktop\RECOVER-FILES.txt regsvr32.exe -
Drops file in Windows directory 2 IoCs
Processes:
regsvr32.exedescription ioc Process File created C:\Windows\e6189640.lnk regsvr32.exe File created C:\Windows\RECOVER-FILES.txt regsvr32.exe -
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
Processes:
regsvr32.exepid Process 1516 regsvr32.exe -
Suspicious behavior: EnumeratesProcesses 30 IoCs
Processes:
regsvr32.exepid Process 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe 1684 regsvr32.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
regsvr32.exepid Process 1684 regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
vssvc.exeregsvr32.exedescription pid Process Token: SeBackupPrivilege 1952 vssvc.exe Token: SeRestorePrivilege 1952 vssvc.exe Token: SeAuditPrivilege 1952 vssvc.exe Token: SeDebugPrivilege 1684 regsvr32.exe Token: SeDebugPrivilege 1684 regsvr32.exe Token: SeDebugPrivilege 1684 regsvr32.exe Token: SeDebugPrivilege 1684 regsvr32.exe Token: SeDebugPrivilege 1684 regsvr32.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
cmd.exeregsvr32.exedescription pid Process procid_target PID 1492 wrote to memory of 1516 1492 cmd.exe 26 PID 1492 wrote to memory of 1516 1492 cmd.exe 26 PID 1492 wrote to memory of 1516 1492 cmd.exe 26 PID 1492 wrote to memory of 1516 1492 cmd.exe 26 PID 1492 wrote to memory of 1516 1492 cmd.exe 26 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27 PID 1516 wrote to memory of 1684 1516 regsvr32.exe 27
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\run.bat"1⤵
- Suspicious use of WriteProcessMemory
PID:1492 -
C:\Windows\system32\regsvr32.exeregsvr32.exe /s "C:\Users\Admin\AppData\Local\Temp\sekhmet.dll"2⤵
- Suspicious behavior: CmdExeWriteProcessMemorySpam
- Suspicious use of WriteProcessMemory
PID:1516 -
C:\Windows\SysWOW64\regsvr32.exe/s "C:\Users\Admin\AppData\Local\Temp\sekhmet.dll"3⤵
- Modifies extensions of user files
- Drops startup file
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
PID:1684
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1952