Analysis
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max time kernel
153s -
max time network
161s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
01-07-2022 03:49
Static task
static1
Behavioral task
behavioral1
Sample
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
Resource
win7-20220414-en
General
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Target
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
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Size
732KB
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MD5
a20059fdc62668a1bc68d5f1691b33de
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SHA1
6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
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SHA256
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
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SHA512
5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb
Malware Config
Signatures
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Kutaki Executable 2 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe family_kutaki C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe family_kutaki -
Executes dropped EXE 1 IoCs
Processes:
femsfach.exepid process 1600 femsfach.exe -
Drops startup file 2 IoCs
Processes:
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe -
Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
femsfach.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum femsfach.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 femsfach.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exefemsfach.exepid process 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe 1600 femsfach.exe 1600 femsfach.exe 1600 femsfach.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exedescription pid process target process PID 1620 wrote to memory of 5052 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe cmd.exe PID 1620 wrote to memory of 5052 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe cmd.exe PID 1620 wrote to memory of 5052 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe cmd.exe PID 1620 wrote to memory of 1600 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe femsfach.exe PID 1620 wrote to memory of 1600 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe femsfach.exe PID 1620 wrote to memory of 1600 1620 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe femsfach.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe"1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1620 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:5052
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe"2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious use of SetWindowsHookEx
PID:1600
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
732KB
MD5a20059fdc62668a1bc68d5f1691b33de
SHA16f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA5125a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb
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Filesize
732KB
MD5a20059fdc62668a1bc68d5f1691b33de
SHA16f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA5125a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb