Malware Analysis Report

2025-01-18 21:37

Sample ID 240415-q82eesga55
Target f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118
SHA256 33eb9952b740e5f98f8d237b2100d73ca1dfd4d8eb3bb71dd14a35a16e121957
Tags
adware stealer
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

33eb9952b740e5f98f8d237b2100d73ca1dfd4d8eb3bb71dd14a35a16e121957

Threat Level: Shows suspicious behavior

The file f1389c766c2d12ecec5cf72ddfb03983_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 13:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 13:56

Reported

2024-04-15 13:59

Platform

win7-20240221-en

Max time kernel

118s

Max time network

121s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1389c766c2d12ecec5cf72ddfb03983_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-D49B-86E1-DA3E-B73AF91D829C} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ProgID\ = "f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2204 wrote to memory of 2488 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\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll

Network

N/A

Files

memory/2488-0-0x0000000000980000-0x0000000000A24000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 13:56

Reported

2024-04-15 13:59

Platform

win10v2004-20240412-en

Max time kernel

93s

Max time network

123s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f1389c766c2d12ecec5cf72ddfb03983_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-D49B-86E1-DA3E-B73AF91D829C} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc\Clsid\ = "{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ = "brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C}\ProgID\ = "f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.brm inc" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CC01FC6C-D49B-86E1-DA3E-B73AF91D829C} C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3416 wrote to memory of 4148 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3416 wrote to memory of 4148 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3416 wrote to memory of 4148 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\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f1389c766c2d12ecec5cf72ddfb03983_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 73.159.190.20.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 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 17.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp

Files

memory/4148-0-0x00000000009D0000-0x0000000000A74000-memory.dmp