Analysis Overview
SHA256
08956ecb861feeae3d61059bf2b72fa589ae01030bf3587edac7d3affa340590
Threat Level: Shows suspicious behavior
The file 8a97591c2f062c66786fc7636e51bdfe was found to be: Shows suspicious behavior.
Malicious Activity Summary
Adds Run key to start application
Installs/modifies Browser Helper Object
Unsigned PE
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-02-02 21:35
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-02 21:35
Reported
2024-02-02 21:37
Platform
win7-20231215-en
Max time kernel
122s
Max time network
128s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{87dc3652-1fa9-c3fa-aa4a-87ae76b0c72f} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\8a97591c2f062c66786fc7636e51bdfe.dll\" DllStart" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{21496767-ee1d-4d41-e625-ae6e7300abee} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{21496767-ee1d-4d41-e625-ae6e7300abee}\NoExplorer = "\"\"" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21496767-ee1d-4d41-e625-ae6e7300abee}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21496767-ee1d-4d41-e625-ae6e7300abee}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8a97591c2f062c66786fc7636e51bdfe.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21496767-ee1d-4d41-e625-ae6e7300abee}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21496767-ee1d-4d41-e625-ae6e7300abee} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21496767-ee1d-4d41-e625-ae6e7300abee}\ = "radbanner browser enhancer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2148 wrote to memory of 1428 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\8a97591c2f062c66786fc7636e51bdfe.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\8a97591c2f062c66786fc7636e51bdfe.dll
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-02 21:35
Reported
2024-02-02 21:37
Platform
win10v2004-20231222-en
Max time kernel
93s
Max time network
95s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\{8f7db5fb-ea9e-2dbe-6c83-e81a65b9e8f9} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\8a97591c2f062c66786fc7636e51bdfe.dll\" DllStart" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5a7d2f70-a033-d254-9a57-5791d17d0f25} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5a7d2f70-a033-d254-9a57-5791d17d0f25}\NoExplorer = "\"\"" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a7d2f70-a033-d254-9a57-5791d17d0f25}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a7d2f70-a033-d254-9a57-5791d17d0f25}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8a97591c2f062c66786fc7636e51bdfe.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a7d2f70-a033-d254-9a57-5791d17d0f25}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a7d2f70-a033-d254-9a57-5791d17d0f25} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a7d2f70-a033-d254-9a57-5791d17d0f25}\ = "radbanner browser enhancer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3208 wrote to memory of 4948 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3208 wrote to memory of 4948 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3208 wrote to memory of 4948 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\8a97591c2f062c66786fc7636e51bdfe.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\8a97591c2f062c66786fc7636e51bdfe.dll
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 179.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 175.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |