Analysis Overview
SHA256
f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25
Threat Level: Shows suspicious behavior
The file f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Modifies system executable filetype association
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-09 23:06
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-09 23:06
Reported
2024-11-09 23:09
Platform
win7-20240903-en
Max time kernel
149s
Max time network
117s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\system\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1731193617" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1731193617" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe
"C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
Files
memory/1624-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | 876d4ddf656f4a974ba044fb20f20050 |
| SHA1 | b6124533fa3a53957003c9591e9d0c2f4d1feba2 |
| SHA256 | 86cc6a92deb3a2054fd039a2e8923b036797425095d85cee2e9489f869b1fd7c |
| SHA512 | a5b550e615e1432e39b7004cb21a8a83ec9573b72c8abb001c1c15ab923deb85ec90844518375b0c1918e4655a5f57d5c5c848577b397363a5c262ca72c82bf0 |
\Windows\system\rundll32.exe
| MD5 | b6e3eef832091e5c446ae3e2972837e4 |
| SHA1 | 5ec0efdcdfb7f3370dca5e43a36eb22aa640262b |
| SHA256 | 2b23f5584d89d49085b6ee1e1a48824e44b44cb1cd18ec1028e360f541a09127 |
| SHA512 | 9e423c0497b494e7b05af692d34cdbb3e7d54262f83a66585bb56e8010fc8311776bab611d6011cffd6c6ea0bc655d8eeac4fc7eeebd4404936f030a9f558f23 |
memory/1624-12-0x00000000002E0000-0x00000000002F6000-memory.dmp
memory/1624-19-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/1624-20-0x00000000002E0000-0x00000000002E2000-memory.dmp
memory/604-21-0x0000000000400000-0x0000000000415A00-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-09 23:06
Reported
2024-11-09 23:09
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
140s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\system\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1731193621" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1731193621" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3380 wrote to memory of 220 | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | C:\Windows\system\rundll32.exe |
| PID 3380 wrote to memory of 220 | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | C:\Windows\system\rundll32.exe |
| PID 3380 wrote to memory of 220 | N/A | C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe | C:\Windows\system\rundll32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe
"C:\Users\Admin\AppData\Local\Temp\f9a4c6221281d40951f0f4fdc7a7abc32729c1e051ab7e50ea91b9962033ec25.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 123.237.251.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 212.20.149.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
Files
memory/3380-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | ef3dc5c6459114885b85bd3f01a1e553 |
| SHA1 | 067b72aef5c9bf550035176439e998530d73b0cc |
| SHA256 | d972995011b46407a0f6d0d1bbbe2e302af6fc6b6f405969c816d028ba5d5bbc |
| SHA512 | 35970fe9f33d107f1701d58a5b28be9872ab2e92762672d725c491df201202226645182d6f5d768686279670bddaf5db4452f7aa6d2f9899e744eaba9eb6e285 |
C:\Windows\system\rundll32.exe
| MD5 | 46cab76d256c2d99762adb5ea0b3797f |
| SHA1 | dc1b0e7e206f30d228f40022dc33bd9cc76a9860 |
| SHA256 | d665bda3c381df1d0a59b5a32d92c3ce448421f5c4ad4070a2754b152b1b25c1 |
| SHA512 | 652083faad21ea8777d7140d3996e5048c6d76f3bbdfca1230cdf2221b60fd7c344a10f75ba9c804d2383ecaa2211244da7308f18449d4f5c68018fd70792e04 |
memory/3380-13-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/220-14-0x0000000000400000-0x0000000000415A00-memory.dmp