Malware Analysis Report

2025-01-03 09:11

Sample ID 240620-lz2xda1flc
Target 04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118
SHA256 cfb4b105e7f446720484fe2d1bf081c24042bec6bc2740fb5f6042a8b166052c
Tags
bootkit discovery persistence
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

cfb4b105e7f446720484fe2d1bf081c24042bec6bc2740fb5f6042a8b166052c

Threat Level: Shows suspicious behavior

The file 04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit discovery persistence

Checks installed software on the system

Writes to the Master Boot Record (MBR)

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-20 09:59

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-20 09:59

Reported

2024-06-20 10:01

Platform

win7-20231129-en

Max time kernel

120s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

Signatures

Checks installed software on the system

discovery

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2936 wrote to memory of 2264 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

Network

N/A

Files

memory/2264-0-0x00000000001C0000-0x00000000001C8000-memory.dmp

memory/2264-3-0x00000000001C0000-0x00000000001C8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-20 09:59

Reported

2024-06-20 10:01

Platform

win10v2004-20240508-en

Max time kernel

146s

Max time network

152s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5056 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5056 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 5056 wrote to memory of 1932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\04f5eecf958a65c1d90c30181d648bb1_JaffaCakes118.dll,#1

Network

Files

memory/1932-0-0x00000000003E0000-0x00000000003E8000-memory.dmp