Analysis
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max time kernel
157s -
max time network
47s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
25-06-2022 22:04
Static task
static1
Behavioral task
behavioral1
Sample
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
Resource
win7-20220414-en
General
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Target
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
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Size
707KB
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MD5
eb31bd6d5ff7c28b47395961db00d4bd
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SHA1
2a41952d03da49c16095cc5aca603cd3bb8a2972
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SHA256
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
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SHA512
c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137
Malware Config
Signatures
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Kutaki Executable 4 IoCs
Processes:
resource yara_rule \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe family_kutaki \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe family_kutaki C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe family_kutaki C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe family_kutaki -
Executes dropped EXE 1 IoCs
Processes:
hyuder.exepid process 1448 hyuder.exe -
Drops startup file 2 IoCs
Processes:
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe -
Loads dropped DLL 2 IoCs
Processes:
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exepid process 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe -
Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
hyuder.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum hyuder.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 hyuder.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Processes:
hyuder.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main hyuder.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exehyuder.exepid process 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe 1448 hyuder.exe 1448 hyuder.exe 1448 hyuder.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exedescription pid process target process PID 1900 wrote to memory of 1336 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe cmd.exe PID 1900 wrote to memory of 1336 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe cmd.exe PID 1900 wrote to memory of 1336 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe cmd.exe PID 1900 wrote to memory of 1336 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe cmd.exe PID 1900 wrote to memory of 1448 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe hyuder.exe PID 1900 wrote to memory of 1448 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe hyuder.exe PID 1900 wrote to memory of 1448 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe hyuder.exe PID 1900 wrote to memory of 1448 1900 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe hyuder.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1900 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:1336
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1448
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
707KB
MD5eb31bd6d5ff7c28b47395961db00d4bd
SHA12a41952d03da49c16095cc5aca603cd3bb8a2972
SHA25637d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137
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Filesize
707KB
MD5eb31bd6d5ff7c28b47395961db00d4bd
SHA12a41952d03da49c16095cc5aca603cd3bb8a2972
SHA25637d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137
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Filesize
707KB
MD5eb31bd6d5ff7c28b47395961db00d4bd
SHA12a41952d03da49c16095cc5aca603cd3bb8a2972
SHA25637d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137
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Filesize
707KB
MD5eb31bd6d5ff7c28b47395961db00d4bd
SHA12a41952d03da49c16095cc5aca603cd3bb8a2972
SHA25637d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137