Analysis
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max time kernel
155s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
03-07-2022 10:15
Static task
static1
Behavioral task
behavioral1
Sample
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
Resource
win7-20220414-en
General
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Target
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
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Size
740KB
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MD5
1ba628a1b76f3a2f4133f94c7c18f91c
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SHA1
876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
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SHA256
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
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SHA512
219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24
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\bknidzch.exe family_kutaki C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe family_kutaki -
Executes dropped EXE 1 IoCs
Processes:
bknidzch.exepid process 644 bknidzch.exe -
Drops startup file 2 IoCs
Processes:
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe -
Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
bknidzch.exedescription ioc process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 bknidzch.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum bknidzch.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:
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exebknidzch.exepid process 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe 644 bknidzch.exe 644 bknidzch.exe 644 bknidzch.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exedescription pid process target process PID 1240 wrote to memory of 4904 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe cmd.exe PID 1240 wrote to memory of 4904 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe cmd.exe PID 1240 wrote to memory of 4904 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe cmd.exe PID 1240 wrote to memory of 644 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe bknidzch.exe PID 1240 wrote to memory of 644 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe bknidzch.exe PID 1240 wrote to memory of 644 1240 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe bknidzch.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe"C:\Users\Admin\AppData\Local\Temp\408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe"1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1240 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\2⤵PID:4904
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe"2⤵
- Executes dropped EXE
- Maps connected drives based on registry
- Suspicious use of SetWindowsHookEx
PID:644
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
740KB
MD51ba628a1b76f3a2f4133f94c7c18f91c
SHA1876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24
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Filesize
740KB
MD51ba628a1b76f3a2f4133f94c7c18f91c
SHA1876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24