Analysis
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max time kernel
150s -
max time network
48s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
08-07-2022 20:25
Static task
static1
Behavioral task
behavioral1
Sample
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe
Resource
win7-20220414-en
General
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Target
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe
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Size
755KB
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MD5
645be265d5378cdfdda8a059a228b9a2
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SHA1
2d7816de252f0881583fce21ccd4ef2e9bfe1dff
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SHA256
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
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SHA512
55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a
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 C:\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 -
Executes dropped EXE 1 IoCs
Processes:
hyuder.exepid process 1120 hyuder.exe -
Drops startup file 2 IoCs
Processes:
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe -
Loads dropped DLL 2 IoCs
Processes:
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exepid process 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.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:
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exehyuder.exepid process 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe 1120 hyuder.exe 1120 hyuder.exe 1120 hyuder.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exedescription pid process target process PID 1932 wrote to memory of 964 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe cmd.exe PID 1932 wrote to memory of 964 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe cmd.exe PID 1932 wrote to memory of 964 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe cmd.exe PID 1932 wrote to memory of 964 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe cmd.exe PID 1932 wrote to memory of 1120 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe hyuder.exe PID 1932 wrote to memory of 1120 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe hyuder.exe PID 1932 wrote to memory of 1120 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe hyuder.exe PID 1932 wrote to memory of 1120 1932 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe hyuder.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe"C:\Users\Admin\AppData\Local\Temp\a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1932 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:964
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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:1120
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
755KB
MD5645be265d5378cdfdda8a059a228b9a2
SHA12d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA51255ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a
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Filesize
755KB
MD5645be265d5378cdfdda8a059a228b9a2
SHA12d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA51255ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a
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Filesize
755KB
MD5645be265d5378cdfdda8a059a228b9a2
SHA12d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA51255ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a
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Filesize
755KB
MD5645be265d5378cdfdda8a059a228b9a2
SHA12d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA51255ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a