Analysis Overview
SHA256
373d756bc01e971b8b84560d81ec37ee74e1e84908a4bc99ca128161f38ead3e
Threat Level: Known bad
The file f4cca71bfe910bcae77502109e261d42 was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Kutaki
Executes dropped EXE
Drops startup file
Loads dropped DLL
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-02-11 17:05
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-11 17:05
Reported
2022-02-11 17:07
Platform
win7-en-20211208
Max time kernel
120s
Max time network
123s
Command Line
Signatures
Kutaki
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe
"C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe"
Network
Files
memory/1560-55-0x0000000075AB1000-0x0000000075AB3000-memory.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe
| MD5 | 0692f7369ad0e05cb31e083aefba8e1c |
| SHA1 | b2cf04e7983a1ed5b378475cfdf215b52de8d1ff |
| SHA256 | dc90482c940a4ab897dcb64e468ccc1767ce48c249755bb625d4e48e718edfd6 |
| SHA512 | 1cbdd7952e91aadd71f30c94c1467d17065cb7aae4c922fc904ca42fdb4ebcd8bfbfff291576b0f8b081ce92a6ebd9a4b6d1fe76ad8a7337d154cc79a03e9b87 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe
| MD5 | 0692f7369ad0e05cb31e083aefba8e1c |
| SHA1 | b2cf04e7983a1ed5b378475cfdf215b52de8d1ff |
| SHA256 | dc90482c940a4ab897dcb64e468ccc1767ce48c249755bb625d4e48e718edfd6 |
| SHA512 | 1cbdd7952e91aadd71f30c94c1467d17065cb7aae4c922fc904ca42fdb4ebcd8bfbfff291576b0f8b081ce92a6ebd9a4b6d1fe76ad8a7337d154cc79a03e9b87 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jzibnoch.exe
| MD5 | 0692f7369ad0e05cb31e083aefba8e1c |
| SHA1 | b2cf04e7983a1ed5b378475cfdf215b52de8d1ff |
| SHA256 | dc90482c940a4ab897dcb64e468ccc1767ce48c249755bb625d4e48e718edfd6 |
| SHA512 | 1cbdd7952e91aadd71f30c94c1467d17065cb7aae4c922fc904ca42fdb4ebcd8bfbfff291576b0f8b081ce92a6ebd9a4b6d1fe76ad8a7337d154cc79a03e9b87 |
Analysis: behavioral2
Detonation Overview
Submitted
2022-02-11 17:05
Reported
2022-02-11 17:07
Platform
win10v2004-en-20220113
Max time kernel
140s
Max time network
134s
Command Line
Signatures
Kutaki
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Logs\CBS\CBS.log | C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe | N/A |
| File opened for modification | C:\Windows\WinSxS\pending.xml | C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe | N/A |
| File opened for modification | C:\Windows\WindowsUpdate.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.edb | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\ReportingEvents.log | C:\Windows\system32\svchost.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4868 wrote to memory of 1672 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4868 wrote to memory of 1672 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4868 wrote to memory of 1672 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4868 wrote to memory of 4896 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe |
| PID 4868 wrote to memory of 4896 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe |
| PID 4868 wrote to memory of 4896 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe
"C:\Users\Admin\AppData\Local\Temp\IncomeTax_PaymentReceipt.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe"
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
Network
Files
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe
| MD5 | 0692f7369ad0e05cb31e083aefba8e1c |
| SHA1 | b2cf04e7983a1ed5b378475cfdf215b52de8d1ff |
| SHA256 | dc90482c940a4ab897dcb64e468ccc1767ce48c249755bb625d4e48e718edfd6 |
| SHA512 | 1cbdd7952e91aadd71f30c94c1467d17065cb7aae4c922fc904ca42fdb4ebcd8bfbfff291576b0f8b081ce92a6ebd9a4b6d1fe76ad8a7337d154cc79a03e9b87 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\isnpnmch.exe
| MD5 | 0692f7369ad0e05cb31e083aefba8e1c |
| SHA1 | b2cf04e7983a1ed5b378475cfdf215b52de8d1ff |
| SHA256 | dc90482c940a4ab897dcb64e468ccc1767ce48c249755bb625d4e48e718edfd6 |
| SHA512 | 1cbdd7952e91aadd71f30c94c1467d17065cb7aae4c922fc904ca42fdb4ebcd8bfbfff291576b0f8b081ce92a6ebd9a4b6d1fe76ad8a7337d154cc79a03e9b87 |
memory/3660-136-0x000001B191370000-0x000001B191380000-memory.dmp
memory/3660-137-0x000001B191A20000-0x000001B191A30000-memory.dmp
memory/3660-138-0x000001B1940F0000-0x000001B1940F4000-memory.dmp