Analysis Overview
SHA256
23e1b2051d263e36627e488507b118c1c1db489ce9622c592201faeaf6182d5f
Threat Level: Known bad
The file 23e1b2051d263e36627e488507b118c1c1db489ce9622c592201faeaf6182d5f was found to be: Known bad.
Malicious Activity Summary
Kutaki family
Kutaki Executable
Drops file in Windows directory
Enumerates physical storage devices
Modifies Internet Explorer settings
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-02-08 00:02
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-08 00:02
Reported
2022-02-08 02:53
Platform
win7-en-20211208
Max time kernel
52s
Max time network
13s
Command Line
Signatures
Enumerates physical storage devices
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1340 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1340 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1340 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1340 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe
"C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
Network
Files
memory/1340-56-0x0000000075CE1000-0x0000000075CE3000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-02-08 00:02
Reported
2022-02-08 02:54
Platform
win10v2004-en-20220113
Max time kernel
156s
Max time network
176s
Command Line
Signatures
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
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections | C:\Windows\System32\svchost.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4700 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4700 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4700 wrote to memory of 2032 | N/A | C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe
"C:\Users\Admin\AppData\Local\Temp\Confirm_Cheque.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p -s BITS
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
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | settings-win.data.microsoft.com | udp |
| US | 52.167.17.97:443 | settings-win.data.microsoft.com | tcp |
| N/A | 127.0.0.1:5985 | tcp | |
| US | 8.8.8.8:53 | crl3.digicert.com | udp |
| US | 93.184.220.29:80 | crl3.digicert.com | tcp |
| US | 8.8.8.8:53 | settings-win.data.microsoft.com | udp |
| US | 52.167.17.97:443 | settings-win.data.microsoft.com | tcp |
| US | 52.167.17.97:443 | settings-win.data.microsoft.com | tcp |
| US | 8.8.8.8:53 | 97.97.242.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | settings-win.data.microsoft.com | udp |
| US | 52.167.249.196:443 | settings-win.data.microsoft.com | tcp |
| US | 52.167.249.196:443 | settings-win.data.microsoft.com | tcp |
| US | 52.167.249.196:443 | settings-win.data.microsoft.com | tcp |
| US | 8.247.210.254:80 | tcp | |
| US | 8.247.210.254:80 | tcp |
Files
memory/1912-138-0x00000211C6180000-0x00000211C6190000-memory.dmp
memory/1912-139-0x00000211C8550000-0x00000211C8554000-memory.dmp
memory/2104-152-0x00000228629A0000-0x00000228629A4000-memory.dmp