Analysis Overview
SHA256
555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7
Threat Level: Known bad
The file 555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7N.exe was found to be: Known bad.
Malicious Activity Summary
Yunsip
Yunsip family
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-12-18 03:42
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-12-18 03:42
Reported
2024-12-18 03:44
Platform
win7-20240903-en
Max time kernel
15s
Max time network
16s
Command Line
Signatures
Yunsip
Yunsip family
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3048 wrote to memory of 3060 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7N.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7N.dll,#1
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-12-18 03:42
Reported
2024-12-18 03:44
Platform
win10v2004-20241007-en
Max time kernel
93s
Max time network
95s
Command Line
Signatures
Yunsip
Yunsip family
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4552 wrote to memory of 3164 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4552 wrote to memory of 3164 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4552 wrote to memory of 3164 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7N.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\555c34022981c093f027b856e33bbdd3b39ebd1f681b6d360b68c125f99c23a7N.dll,#1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |