Analysis Overview
SHA256
064fe665dce5b2cf6d824290c2fdebea593f26b0c4b05efbdd3e300ab926900f
Threat Level: Known bad
The file GST-48B3.cmd was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-11-24 14:07
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2021-11-24 14:07
Reported
2021-11-24 14:09
Platform
win7-en-20211014
Max time kernel
119s
Max time network
119s
Command Line
Signatures
Enumerates physical storage devices
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\DllHost.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 660 wrote to memory of 760 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 660 wrote to memory of 760 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 660 wrote to memory of 760 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 660 wrote to memory of 760 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe
"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Receipt.bmp
C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
Network
Files
memory/660-55-0x0000000000260000-0x0000000000266000-memory.dmp
memory/660-56-0x0000000000260000-0x000000000026A000-memory.dmp
memory/660-57-0x00000000758C1000-0x00000000758C3000-memory.dmp
memory/760-58-0x0000000000000000-mapping.dmp
memory/760-61-0x0000000000580000-0x0000000000582000-memory.dmp
memory/1420-62-0x0000000000170000-0x0000000000172000-memory.dmp
memory/1420-63-0x0000000000220000-0x0000000000221000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-11-24 14:07
Reported
2021-11-24 14:09
Platform
win10-en-20211104
Max time kernel
119s
Max time network
123s
Command Line
Signatures
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Debug\WIA\wiatrace.log | C:\Windows\SysWOW64\mspaint.exe | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000_Classes\Local Settings | C:\Windows\SysWOW64\cmd.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2436 wrote to memory of 3476 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2436 wrote to memory of 3476 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2436 wrote to memory of 3476 | N/A | C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3476 wrote to memory of 3348 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\mspaint.exe |
| PID 3476 wrote to memory of 3348 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\mspaint.exe |
| PID 3476 wrote to memory of 3348 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\mspaint.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe
"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Receipt.bmp
C:\Windows\SysWOW64\mspaint.exe
"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\Receipt.bmp"
\??\c:\windows\system32\svchost.exe
c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s DeviceAssociationService
Network
Files
memory/2436-118-0x00000000001E0000-0x00000000001E6000-memory.dmp
memory/2436-119-0x00000000001E0000-0x00000000001EA000-memory.dmp
memory/3476-120-0x0000000000000000-mapping.dmp
memory/3348-121-0x0000000000000000-mapping.dmp