Analysis
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max time kernel
152s -
max time network
172s -
platform
windows10-2004_x64 -
resource
win10v2004-20220721-en -
resource tags
arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system -
submitted
26-07-2022 18:40
Behavioral task
behavioral1
Sample
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe
Resource
win7-20220718-en
General
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Target
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe
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Size
795KB
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MD5
17c53a651b72616b46ecb8f5215ed009
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SHA1
c426cc3a5e333bafb8e0b0ed78515dc003da31c6
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SHA256
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4
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SHA512
c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6
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\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 3220 hyuder.exe -
Drops startup file 2 IoCs
Processes:
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.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 value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 hyuder.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum hyuder.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:
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exehyuder.exepid process 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe 3220 hyuder.exe 3220 hyuder.exe 3220 hyuder.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exedescription pid process target process PID 1484 wrote to memory of 3576 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe cmd.exe PID 1484 wrote to memory of 3576 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe cmd.exe PID 1484 wrote to memory of 3576 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe cmd.exe PID 1484 wrote to memory of 3220 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe hyuder.exe PID 1484 wrote to memory of 3220 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe hyuder.exe PID 1484 wrote to memory of 3220 1484 bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe hyuder.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe"C:\Users\Admin\AppData\Local\Temp\bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4.exe"1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1484 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:3576
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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
- Suspicious use of SetWindowsHookEx
PID:3220
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
795KB
MD517c53a651b72616b46ecb8f5215ed009
SHA1c426cc3a5e333bafb8e0b0ed78515dc003da31c6
SHA256bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4
SHA512c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6
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Filesize
795KB
MD517c53a651b72616b46ecb8f5215ed009
SHA1c426cc3a5e333bafb8e0b0ed78515dc003da31c6
SHA256bd83761e9710a92a9b0b60a85c87f5aa2a27d30a8cff821e65df95d323d5b3d4
SHA512c2abab756d7351f819340857d1f500e7344838d28f744de6db39d5e3021b4382be3920b77985f057404f6b6206f09010f2bd0b2fcb61a944276145acf375c5c6