Malware Analysis Report

2025-08-10 18:08

Sample ID 240507-kjew8sgg5w
Target 200d5661e57be4a9ed149671b5957881_JaffaCakes118
SHA256 2786e7fd09b72c01c10c652a1275c92334c89e686a9bfaaa25d872b5bb3d2406
Tags
bootkit persistence
score
7/10

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
7/10

SHA256

2786e7fd09b72c01c10c652a1275c92334c89e686a9bfaaa25d872b5bb3d2406

Threat Level: Shows suspicious behavior

The file 200d5661e57be4a9ed149671b5957881_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit persistence

Checks BIOS information in registry

Writes to the Master Boot Record (MBR)

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-07 08:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-07 08:37

Reported

2024-05-07 08:40

Platform

win7-20231129-en

Max time kernel

118s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\200d5661e57be4a9ed149671b5957881_JaffaCakes118.dll,#1

Signatures

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\system32\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\system32\rundll32.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Windows\system32\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\200d5661e57be4a9ed149671b5957881_JaffaCakes118.dll,#1

Network

N/A

Files

memory/2548-0-0x000007FEF5930000-0x000007FEF6163000-memory.dmp

memory/2548-2-0x000007FEF50F0000-0x000007FEF5923000-memory.dmp

memory/2548-3-0x000007FEF5930000-0x000007FEF6163000-memory.dmp

memory/2548-6-0x000007FEF50F0000-0x000007FEF5923000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-07 08:37

Reported

2024-05-07 08:40

Platform

win10v2004-20240426-en

Max time kernel

136s

Max time network

100s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\200d5661e57be4a9ed149671b5957881_JaffaCakes118.dll,#1

Signatures

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\system32\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\system32\rundll32.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Windows\system32\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\200d5661e57be4a9ed149671b5957881_JaffaCakes118.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
GB 23.73.138.11:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
GB 23.73.138.11:443 www.bing.com tcp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 11.138.73.23.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/2504-0-0x00007FFD6F0F0000-0x00007FFD6F923000-memory.dmp