Analysis
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max time kernel
188s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
25-06-2022 05:26
Static task
static1
Behavioral task
behavioral1
Sample
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe
Resource
win7-20220414-en
General
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Target
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe
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Size
707KB
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MD5
2600b7e78f3a1d996294bcc27b309594
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SHA1
a90f63310dca46b419cfcbe95d90e1517932d6d3
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SHA256
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
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SHA512
db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b
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 1736 hyuder.exe -
Drops startup file 2 IoCs
Processes:
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe -
Loads dropped DLL 2 IoCs
Processes:
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exepid process 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.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-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main hyuder.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exehyuder.exepid process 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe 1736 hyuder.exe 1736 hyuder.exe 1736 hyuder.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exedescription pid process target process PID 1764 wrote to memory of 1380 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe cmd.exe PID 1764 wrote to memory of 1380 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe cmd.exe PID 1764 wrote to memory of 1380 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe cmd.exe PID 1764 wrote to memory of 1380 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe cmd.exe PID 1764 wrote to memory of 1736 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe hyuder.exe PID 1764 wrote to memory of 1736 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe hyuder.exe PID 1764 wrote to memory of 1736 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe hyuder.exe PID 1764 wrote to memory of 1736 1764 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe hyuder.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1764 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:1380
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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:1736
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
707KB
MD52600b7e78f3a1d996294bcc27b309594
SHA1a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA2568b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b
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Filesize
707KB
MD52600b7e78f3a1d996294bcc27b309594
SHA1a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA2568b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b
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Filesize
707KB
MD52600b7e78f3a1d996294bcc27b309594
SHA1a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA2568b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b
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Filesize
707KB
MD52600b7e78f3a1d996294bcc27b309594
SHA1a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA2568b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b