Analysis Overview
SHA256
521c6391fa9b9d500dd3b637f1f2b5ef1bdbc2dbea944fc016cdeeca11142e6c
Threat Level: Shows suspicious behavior
The file efbfa8491b748ed579476f10632674bc_JaffaCakes118 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Installs/modifies Browser Helper Object
Unsigned PE
Modifies Internet Explorer settings
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-14 23:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-14 23:20
Reported
2024-04-14 23:23
Platform
win7-20240221-en
Max time kernel
117s
Max time network
122s
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\{51419376-C9A9-D47E-DB89-AABB84E696A8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{51419376-C9A9-D47E-DB89-AABB84E696A8}\NoExplorer = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars\{C5088127-4B11-65CA-6CCC-2D2F7610794E} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Internet Explorer\Explorer Bars | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Internet Explorer\Explorer Bars\{C5088127-4B11-65CA-6CCC-2D2F7610794E} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{51419376-C9A9-D47E-DB89-AABB84E696A8} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\Implemented Categories | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{51419376-C9A9-D47E-DB89-AABB84E696A8}\ = "seekgadget search enhancer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{51419376-C9A9-D47E-DB89-AABB84E696A8}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{51419376-C9A9-D47E-DB89-AABB84E696A8}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\Programmable | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\ = "Search panel" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\Implemented Categories\{00021493-0000-0000-C000-000000000046} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{51419376-C9A9-D47E-DB89-AABB84E696A8}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C5088127-4B11-65CA-6CCC-2D2F7610794E}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1768 wrote to memory of 2020 | 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\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-14 23:20
Reported
2024-04-14 23:23
Platform
win10v2004-20240412-en
Max time kernel
147s
Max time network
155s
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\{36E44601-2D67-CCAD-E278-7A66D613DB49} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{36E44601-2D67-CCAD-E278-7A66D613DB49}\NoExplorer = "1" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars\{A8A4A2D3-641F-3A80-3D6A-194635091B9B} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{36E44601-2D67-CCAD-E278-7A66D613DB49} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\Programmable | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\Implemented Categories | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\Implemented Categories\{00021493-0000-0000-C000-000000000046} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{36E44601-2D67-CCAD-E278-7A66D613DB49}\ = "seekgadget search enhancer" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{36E44601-2D67-CCAD-E278-7A66D613DB49}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{36E44601-2D67-CCAD-E278-7A66D613DB49}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\ = "Search panel" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\InProcServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{36E44601-2D67-CCAD-E278-7A66D613DB49}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A8A4A2D3-641F-3A80-3D6A-194635091B9B}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1936 wrote to memory of 3548 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1936 wrote to memory of 3548 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1936 wrote to memory of 3548 | 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\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\efbfa8491b748ed579476f10632674bc_JaffaCakes118.dll
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| NL | 52.111.243.30:443 | tcp | |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 1.173.189.20.in-addr.arpa | udp |