Analysis Overview
SHA256
6b4d50ee4950a8a97627c9281f3cca2266d1d16d20adc249c3f9a84c29967b94
Threat Level: Shows suspicious behavior
The file f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Installs/modifies Browser Helper Object
Drops file in System32 directory
Drops file in Program Files directory
Unsigned PE
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-15 13:49
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-15 13:49
Reported
2024-04-15 13:52
Platform
win7-20240220-en
Max time kernel
119s
Max time network
120s
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\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\c__3948.nls | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\Mozilla Firefox\firefox.exe | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ = "NETWORK SERVICE" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID\ = "f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\ = "NETWORK SERVICE" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid\ = "{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 2764 wrote to memory of 2128 | 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\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll
Network
Files
memory/2128-0-0x0000000000670000-0x0000000000749000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-15 13:49
Reported
2024-04-15 13:52
Platform
win10v2004-20240412-en
Max time kernel
147s
Max time network
154s
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\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\c__3948.nls | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\Mozilla Firefox\firefox.exe | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A} | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ = "NETWORK SERVICE" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\ = "NETWORK SERVICE" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service\Clsid\ = "{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID\ = "f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.Microsoft Update Service" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32 | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3008 wrote to memory of 1336 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3008 wrote to memory of 1336 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3008 wrote to memory of 1336 | 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\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\f1355d1e00ebb8f7bc4cbbc6b173a346_JaffaCakes118.dll
Network
| Country | Destination | Domain | Proto |
| 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 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| 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 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.143.109.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| IE | 52.111.236.22:443 | tcp | |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 204.201.50.20.in-addr.arpa | udp |
Files
memory/1336-0-0x0000000000800000-0x00000000008D9000-memory.dmp