Malware Analysis Report

2025-08-05 12:51

Sample ID 240509-a746xsbe89
Target 5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b
SHA256 5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b
Tags
bootkit 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

5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b

Threat Level: Shows suspicious behavior

The file 5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit persistence

Writes to the Master Boot Record (MBR)

Unsigned PE

Program crash

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 00:52

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 00:52

Reported

2024-05-09 00:54

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe"

Signatures

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe

"C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 868 -ip 868

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 868 -s 692

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
NL 23.62.61.194:443 www.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 18.173.189.20.in-addr.arpa udp

Files

memory/868-0-0x0000000002280000-0x0000000002281000-memory.dmp

memory/868-1-0x0000000002990000-0x0000000002A10000-memory.dmp

memory/868-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/868-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/868-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/868-6-0x0000000002280000-0x0000000002281000-memory.dmp

memory/868-8-0x0000000000400000-0x000000000046F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 00:52

Reported

2024-05-09 00:54

Platform

win11-20240508-en

Max time kernel

149s

Max time network

101s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe"

Signatures

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe

"C:\Users\Admin\AppData\Local\Temp\5ff87c3d25e5811e6f12a395ece0c11723545515b00019a0c9a300068152f80b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2620 -ip 2620

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2620 -s 712

Network

Country Destination Domain Proto
US 52.111.229.43:443 tcp

Files

memory/2620-0-0x0000000002350000-0x0000000002351000-memory.dmp

memory/2620-1-0x00000000028A0000-0x0000000002920000-memory.dmp

memory/2620-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/2620-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/2620-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/2620-7-0x0000000000400000-0x000000000046F000-memory.dmp