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Analysis
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max time kernel
148s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
05/12/2022, 06:07
Static task
static1
Behavioral task
behavioral1
Sample
eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe
Resource
win10v2004-20220812-en
General
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Target
eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe
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Size
258KB
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MD5
0fea74f0a3678ccf16643642beebca20
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SHA1
fa769c0f95a3eb845e7ad27d0c30b3df35ebbb27
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SHA256
eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2
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SHA512
be729b0ea20d0ce8a9e7856fbc4ff9c6f19332ecdfcb92ff97984b20c6de5908eba9cf0772233be60e129c127c94235ae1b6b01807ce2f4ad0dce2f3038d1cad
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SSDEEP
6144:mQ7ZxwGr6dYgE85WuIeJ8nS3BwgGTTBuj7ON:mKetYH851Ie8nOagGTTE+N
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 4936 SysCheck.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysCheck = "C:\\Windows\\system32\\SysCheck.exe" SysCheck.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysCheck = "C:\\Windows\\system32\\SysCheck.exe" SysCheck.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\system32\SysCheck.dll SysCheck.exe File opened for modification C:\Windows\system32\SysCheck.exe eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe File created C:\Windows\system32\SysCheck.exe eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe File opened for modification C:\Windows\system32\SysCheck.dll SysCheck.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 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dllfile\shell\open\command eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dllfile eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dllfile\shell eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dllfile\shell\open eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dllfile\shell\open\command\ = "rundll32.exe" eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe Token: SeDebugPrivilege 4936 SysCheck.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 880 wrote to memory of 4936 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe 80 PID 880 wrote to memory of 4936 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe 80 PID 880 wrote to memory of 4936 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe 80 PID 880 wrote to memory of 2596 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe 65 PID 880 wrote to memory of 2596 880 eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe 65
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:2596
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C:\Users\Admin\AppData\Local\Temp\eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe"C:\Users\Admin\AppData\Local\Temp\eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2.exe"2⤵
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:880 -
C:\Windows\system32\SysCheck.exeC:\Windows\system32\SysCheck.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
PID:4936
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
258KB
MD50fea74f0a3678ccf16643642beebca20
SHA1fa769c0f95a3eb845e7ad27d0c30b3df35ebbb27
SHA256eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2
SHA512be729b0ea20d0ce8a9e7856fbc4ff9c6f19332ecdfcb92ff97984b20c6de5908eba9cf0772233be60e129c127c94235ae1b6b01807ce2f4ad0dce2f3038d1cad
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Filesize
258KB
MD50fea74f0a3678ccf16643642beebca20
SHA1fa769c0f95a3eb845e7ad27d0c30b3df35ebbb27
SHA256eb590c9f6e69bc427a43db0ac150f95fb13c13ab718d5b392ff2cc92820441f2
SHA512be729b0ea20d0ce8a9e7856fbc4ff9c6f19332ecdfcb92ff97984b20c6de5908eba9cf0772233be60e129c127c94235ae1b6b01807ce2f4ad0dce2f3038d1cad