Malware Analysis Report

2025-01-03 09:22

Sample ID 240620-nyh4zszejq
Target 05b48d4ae33558b8c48071550b206566_JaffaCakes118
SHA256 bd272ba3e6b7f83b5e1e451765a25e30b8be76bcafa362e367c7740c35f3bb8c
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

bd272ba3e6b7f83b5e1e451765a25e30b8be76bcafa362e367c7740c35f3bb8c

Threat Level: Shows suspicious behavior

The file 05b48d4ae33558b8c48071550b206566_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 11:48

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-20 11:48

Reported

2024-06-20 11:50

Platform

win7-20240508-en

Max time kernel

121s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b48d4ae33558b8c48071550b206566_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 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2904 wrote to memory of 2920 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\05b48d4ae33558b8c48071550b206566_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b48d4ae33558b8c48071550b206566_JaffaCakes118.dll,#1

Network

N/A

Files

memory/2920-0-0x0000000000180000-0x000000000018A000-memory.dmp

memory/2920-1-0x0000000010000000-0x0000000010009000-memory.dmp

memory/2920-5-0x0000000000180000-0x000000000018A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-20 11:48

Reported

2024-06-20 11:50

Platform

win10v2004-20240508-en

Max time kernel

141s

Max time network

51s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b48d4ae33558b8c48071550b206566_JaffaCakes118.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1872 wrote to memory of 1444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1872 wrote to memory of 1444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1872 wrote to memory of 1444 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\05b48d4ae33558b8c48071550b206566_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b48d4ae33558b8c48071550b206566_JaffaCakes118.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/1444-0-0x00000000006F0000-0x00000000006FA000-memory.dmp

memory/1444-2-0x0000000010000000-0x0000000010009000-memory.dmp

memory/1444-5-0x00000000006F0000-0x0000000000700000-memory.dmp

memory/1444-8-0x00000000006F0000-0x0000000000700000-memory.dmp