Analysis Overview
SHA256
0c91706d6fecc4bad18e1e0b527e8bf1ffa13befe9ce2ca6a7ba8513df4e65f8
Threat Level: Shows suspicious behavior
The file ef9ab2023977e956d28040b05d00703c_JaffaCakes118 was found to be: Shows suspicious behavior.
Malicious Activity Summary
ASPack v2.12-2.42
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
2024-04-14 21:58
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
2024-04-14 21:58
Reported
2024-04-14 22:01
Platform
win7-20240221-en
Max time kernel
119s
Max time network
129s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{b3e4bcce-59d8-64cc-8c94-f93fc19fe155} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.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\{beff04d1-f40e-6766-65bb-ef7c88b0801a} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{beff04d1-f40e-6766-65bb-ef7c88b0801a}\NoExplorer = "\"\"" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{beff04d1-f40e-6766-65bb-ef7c88b0801a} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{beff04d1-f40e-6766-65bb-ef7c88b0801a}\ = "adsonmedia browser optimizer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{beff04d1-f40e-6766-65bb-ef7c88b0801a}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{beff04d1-f40e-6766-65bb-ef7c88b0801a}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{beff04d1-f40e-6766-65bb-ef7c88b0801a}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2804 wrote to memory of 2732 | 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\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll
Network
Files
memory/2732-0-0x0000000010000000-0x0000000010072000-memory.dmp
memory/2732-1-0x0000000001DB0000-0x0000000001E0A000-memory.dmp
memory/2732-2-0x00000000030A0000-0x00000000030A2000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-14 21:58
Reported
2024-04-14 22:01
Platform
win10v2004-20240412-en
Max time kernel
121s
Max time network
166s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\{36b99ea0-d2ab-a2a4-39d4-41049dc00a24} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.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\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f}\NoExplorer = "\"\"" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f}\ = "adsonmedia browser optimizer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{fcd4eee4-ec1d-1b53-9a6e-2edd34d2547f}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1404 wrote to memory of 1016 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1404 wrote to memory of 1016 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1404 wrote to memory of 1016 | 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\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\ef9ab2023977e956d28040b05d00703c_JaffaCakes118.dll
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 | 23.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 169.117.168.52.in-addr.arpa | udp |
Files
memory/1016-0-0x0000000010000000-0x0000000010072000-memory.dmp
memory/1016-1-0x00000000015D0000-0x000000000162A000-memory.dmp
memory/1016-2-0x0000000003DE0000-0x0000000003DE2000-memory.dmp
memory/1016-3-0x0000000000FE0000-0x0000000000FE1000-memory.dmp
memory/1016-4-0x0000000000FF0000-0x0000000000FF1000-memory.dmp
memory/1016-5-0x0000000002F50000-0x0000000002F51000-memory.dmp
memory/1016-6-0x0000000003160000-0x0000000003161000-memory.dmp
memory/1016-7-0x0000000003E30000-0x0000000003E31000-memory.dmp
memory/1016-8-0x0000000003210000-0x0000000003211000-memory.dmp
memory/1016-9-0x0000000003E50000-0x0000000003E51000-memory.dmp
memory/1016-10-0x0000000003EC0000-0x0000000003EC1000-memory.dmp
memory/1016-11-0x0000000003EB0000-0x0000000003EB1000-memory.dmp
memory/1016-12-0x0000000003ED0000-0x0000000003ED1000-memory.dmp
memory/1016-13-0x0000000003ED0000-0x0000000003ED1000-memory.dmp