Analysis
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max time kernel
137s -
max time network
119s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
01-02-2022 02:19
Static task
static1
Behavioral task
behavioral1
Sample
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe
Resource
win10v2004-en-20220112
General
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Target
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe
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Size
816KB
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MD5
7179c01d287ea46e21056c636762968e
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SHA1
a415e62ffb1aa36634d5829e4860440f98623358
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SHA256
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9
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SHA512
875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc
Malware Config
Signatures
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Kutaki Executable 3 IoCs
Processes:
resource yara_rule behavioral1/files/0x0008000000012284-62.dat family_kutaki behavioral1/files/0x0008000000012284-63.dat family_kutaki behavioral1/files/0x0008000000012284-64.dat family_kutaki -
Executes dropped EXE 1 IoCs
Processes:
tkmsbrch.exepid Process 1816 tkmsbrch.exe -
Drops startup file 2 IoCs
Processes:
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exedescription ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe -
Loads dropped DLL 2 IoCs
Processes:
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exepid Process 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.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 FindShellTrayWindow 1 IoCs
Processes:
DllHost.exepid Process 1484 DllHost.exe -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exetkmsbrch.exepid Process 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe 1816 tkmsbrch.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exedescription pid Process procid_target PID 1092 wrote to memory of 708 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 28 PID 1092 wrote to memory of 708 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 28 PID 1092 wrote to memory of 708 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 28 PID 1092 wrote to memory of 708 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 28 PID 1092 wrote to memory of 1816 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 31 PID 1092 wrote to memory of 1816 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 31 PID 1092 wrote to memory of 1816 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 31 PID 1092 wrote to memory of 1816 1092 c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe"C:\Users\Admin\AppData\Local\Temp\c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1092 -
C:\Windows\SysWOW64\cmd.execmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp2⤵PID:708
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tkmsbrch.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1816
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}1⤵
- Suspicious use of FindShellTrayWindow
PID:1484
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
7179c01d287ea46e21056c636762968e
SHA1a415e62ffb1aa36634d5829e4860440f98623358
SHA256c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9
SHA512875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc
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MD5
7179c01d287ea46e21056c636762968e
SHA1a415e62ffb1aa36634d5829e4860440f98623358
SHA256c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9
SHA512875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc
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MD5
7179c01d287ea46e21056c636762968e
SHA1a415e62ffb1aa36634d5829e4860440f98623358
SHA256c1a4f8840c7d3c16fa5bb0b52507a501da19dff827fff7b64778f24726d8d5c9
SHA512875034e75889847861f603afada2ea5a7ebc1058e84dea5759dd8528055ad48cfd2b64bca3109721ccc2a16f171b8368649603955d69583380ec1400e5b34dfc