Malware Analysis Report

2024-10-19 10:47

Sample ID 240620-jsneas1epl
Target 042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118
SHA256 584dd4f18ff5bd80417cb2e263e244bf32804011c4a68a0db7d4fb093ee8fd60
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

584dd4f18ff5bd80417cb2e263e244bf32804011c4a68a0db7d4fb093ee8fd60

Threat Level: Shows suspicious behavior

The file 042f85ef1b4aba0dec57b4c72e872166_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

2024-06-20 07:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-20 07:56

Reported

2024-06-20 07:58

Platform

win7-20240611-en

Max time kernel

120s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\042f85ef1b4aba0dec57b4c72e872166_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\{884B6FB1-B27D-4719-B64F-0EF41D469FDE} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\ = "z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\Clsid\ = "{884B6FB1-B27D-4719-B64F-0EF41D469FDE}" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ProgID\ = "042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ = "z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2408 wrote to memory of 1728 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\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll

Network

N/A

Files

memory/1728-0-0x00000000001C0000-0x0000000000235000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-20 07:56

Reported

2024-06-20 07:58

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\042f85ef1b4aba0dec57b4c72e872166_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\{884B6FB1-B27D-4719-B64F-0EF41D469FDE} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\Clsid\ = "{884B6FB1-B27D-4719-B64F-0EF41D469FDE}" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ = "z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\Clsid C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ProgID C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\ProgID\ = "042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{884B6FB1-B27D-4719-B64F-0EF41D469FDE}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.z9981z\ = "z9981z" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4128 wrote to memory of 4392 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4128 wrote to memory of 4392 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4128 wrote to memory of 4392 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\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\042f85ef1b4aba0dec57b4c72e872166_JaffaCakes118.dll

Network

Files

N/A