Malware Analysis Report

2025-08-05 12:51

Sample ID 240509-cm98jsch2z
Target 4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690
SHA256 4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690
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

4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690

Threat Level: Shows suspicious behavior

The file 4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690 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 02:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 02:12

Reported

2024-05-09 02:15

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.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\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe

"C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1996 -ip 1996

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1996 -s 712

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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
BE 2.17.107.105:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 105.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
BE 2.17.107.105:443 www.bing.com tcp
US 8.8.8.8:53 103.169.127.40.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 99.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.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
US 8.8.8.8:53 udp

Files

memory/1996-0-0x0000000002140000-0x0000000002141000-memory.dmp

memory/1996-1-0x0000000002780000-0x0000000002800000-memory.dmp

memory/1996-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/1996-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/1996-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/1996-6-0x0000000002140000-0x0000000002141000-memory.dmp

memory/1996-8-0x0000000000400000-0x000000000046F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 02:12

Reported

2024-05-09 02:15

Platform

win11-20240508-en

Max time kernel

146s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.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\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe

"C:\Users\Admin\AppData\Local\Temp\4b50a8718f0d88015f04adf4e7e791d714196045faee0870c4ac072458d49690.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1272 -ip 1272

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1272 -s 716

Network

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

Files

memory/1272-0-0x0000000002350000-0x0000000002351000-memory.dmp

memory/1272-1-0x00000000028F0000-0x0000000002970000-memory.dmp

memory/1272-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/1272-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/1272-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/1272-6-0x0000000002350000-0x0000000002351000-memory.dmp

memory/1272-8-0x0000000000400000-0x000000000046F000-memory.dmp