Analysis Overview
SHA256
01fbc97e30085502c8c512030e5f5d1af209355390028c1e18fe129efd2cbe28
Threat Level: Shows suspicious behavior
The file 8fc3a047adee8a3c088e0db30aa2da1d was found to be: Shows suspicious behavior.
Malicious Activity Summary
ASPack v2.12-2.42
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
2024-02-04 17:42
Signatures
ASPack v2.12-2.42
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-04 17:42
Reported
2024-02-04 17:45
Platform
win7-20231215-en
Max time kernel
120s
Max time network
123s
Command Line
Signatures
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8fc3a047adee8a3c088e0db30aa2da1d.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\ = "Explore.Tuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid\ = "{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ = "Explore.Tuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID\ = "8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1200 wrote to memory of 2580 | 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\8fc3a047adee8a3c088e0db30aa2da1d.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\8fc3a047adee8a3c088e0db30aa2da1d.dll
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-04 17:42
Reported
2024-02-04 17:45
Platform
win10v2004-20231222-en
Max time kernel
144s
Max time network
149s
Command Line
Signatures
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ = "Explore.Tuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8fc3a047adee8a3c088e0db30aa2da1d.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid\ = "{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\ = "Explore.Tuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID\ = "8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4000 wrote to memory of 860 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 4000 wrote to memory of 860 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 4000 wrote to memory of 860 | 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\8fc3a047adee8a3c088e0db30aa2da1d.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\8fc3a047adee8a3c088e0db30aa2da1d.dll
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 75.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 53.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 182.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.173.189.20.in-addr.arpa | udp |