Malware Analysis Report

2025-08-05 12:50

Sample ID 240509-brbecaae61
Target 55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a
SHA256 55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a
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

55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a

Threat Level: Shows suspicious behavior

The file 55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a 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 01:22

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 01:22

Reported

2024-05-09 01:24

Platform

win10v2004-20240426-en

Max time kernel

146s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.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\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe

"C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3576 -ip 3576

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3576 -s 756

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
BE 2.17.107.105:443 www.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
BE 2.17.107.105:443 www.bing.com tcp
US 8.8.8.8:53 105.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.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 8.8.8.8:53 205.47.74.20.in-addr.arpa udp

Files

memory/3576-0-0x00000000006A0000-0x00000000006A1000-memory.dmp

memory/3576-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/3576-1-0x00000000024B0000-0x0000000002530000-memory.dmp

memory/3576-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/3576-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/3576-7-0x0000000000400000-0x000000000046F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 01:22

Reported

2024-05-09 01:24

Platform

win11-20240426-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.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\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe

"C:\Users\Admin\AppData\Local\Temp\55371c7e07003d5fcfe5cf3187b1ba865cbe5ad4b015db5d1bf06195c995080a.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3324 -ip 3324

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3324 -s 704

Network

Country Destination Domain Proto
IE 52.111.236.22:443 tcp

Files

memory/3324-0-0x0000000002380000-0x0000000002381000-memory.dmp

memory/3324-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/3324-1-0x0000000002A00000-0x0000000002A80000-memory.dmp

memory/3324-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/3324-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/3324-7-0x0000000000400000-0x000000000046F000-memory.dmp