Malware Analysis Report

2025-08-05 10:48

Sample ID 241017-bylhwsyclr
Target 5024029acdcec86f2a690dec59e07052_JaffaCakes118
SHA256 ff59c2bdd2a17d1e02517a75fb97f35e253434248017282af4dbacbc3b474b4d
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

ff59c2bdd2a17d1e02517a75fb97f35e253434248017282af4dbacbc3b474b4d

Threat Level: Shows suspicious behavior

The file 5024029acdcec86f2a690dec59e07052_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit discovery persistence

Writes to the Master Boot Record (MBR)

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Modifies data under HKEY_USERS

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-17 01:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-17 01:33

Reported

2024-10-17 01:35

Platform

win7-20241010-en

Max time kernel

13s

Max time network

19s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

Signatures

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

Program crash

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59} C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Version = "*" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.1 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.2 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R18.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59} C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\S-1-5-18 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.1 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.2 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\VersionIndependentProgID\ = "IEHlprObj.IEHlprObj" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AF604EFE-8897-11D1-B944-00A0C90312E1}\InProcServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Programmable\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\InprocServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ProgID\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer\ = "IEHlprObj.IEHlprObj.1" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID\ = "{BF50AC63-19DA-487E-AD4A-0B452D823B59}" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0E5CBF21-D15F-11d0-8301-00AA005B4383}\InProcServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Programmable\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\VersionIndependentProgID\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ProgID\ = "IEHlprObj.IEHlprObj.1" C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2604 -s 232

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-17 01:33

Reported

2024-10-17 01:35

Platform

win10v2004-20241007-en

Max time kernel

139s

Max time network

145s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

Signatures

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Version = "*" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Autodesk\AutoCAD C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Autodesk\AutoCAD\R16.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.1 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.2 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59} C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Autodesk C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.2 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R17.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R18.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.0 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Autodesk\AutoCAD\R16.1 C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ProgID\ = "IEHlprObj.IEHlprObj.1" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Programmable\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\Programmable\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\VersionIndependentProgID\ = "IEHlprObj.IEHlprObj" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\ = "QuickFlash" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\InprocServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer\ = "IEHlprObj.IEHlprObj.1" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\ProgID\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BF50AC63-19DA-487E-AD4A-0B452D823B59}\VersionIndependentProgID\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AF604EFE-8897-11D1-B944-00A0C90312E1}\InProcServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID\ = "{BF50AC63-19DA-487E-AD4A-0B452D823B59}" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0E5CBF21-D15F-11d0-8301-00AA005B4383}\InProcServer32\ C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID\ C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2708 wrote to memory of 2384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2708 wrote to memory of 2384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2708 wrote to memory of 2384 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\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\5024029acdcec86f2a690dec59e07052_JaffaCakes118.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

N/A