Malware Analysis Report

2025-01-18 21:37

Sample ID 240415-rlvtssgd67
Target f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118
SHA256 36dd99327f17f6d34130b3f1d1ee83c04d7c2e5f0332049dba01bc6eb05da957
Tags
adware stealer
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

36dd99327f17f6d34130b3f1d1ee83c04d7c2e5f0332049dba01bc6eb05da957

Threat Level: Shows suspicious behavior

The file f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer

Installs/modifies Browser Helper Object

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 14:17

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 14:17

Reported

2024-04-15 14:19

Platform

win10v2004-20240412-en

Max time kernel

149s

Max time network

152s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ProgID\ = "f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3584 wrote to memory of 2580 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3584 wrote to memory of 2580 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3584 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\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.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 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 23.173.189.20.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 14:17

Reported

2024-04-15 14:19

Platform

win7-20240221-en

Max time kernel

117s

Max time network

121s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ProgID\ = "f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D9B7-2A58-C85B-8ADA65FC8F2F}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1624 wrote to memory of 2940 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\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f141cf456f6de8a05a78bfa38c0fe306_JaffaCakes118.dll

Network

N/A

Files

memory/2940-0-0x0000000000910000-0x00000000009B4000-memory.dmp