Malware Analysis Report

2024-09-23 11:42

Sample ID 240614-xx9d8asfnd
Target 4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a
SHA256 4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a
Tags
bootkit persistence
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a

Threat Level: Shows suspicious behavior

The file 4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit persistence

Writes to the Master Boot Record (MBR)

Unsigned PE

Program crash

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-14 19:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 19:15

Reported

2024-06-14 19:17

Platform

win7-20240508-en

Max time kernel

117s

Max time network

117s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.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

Suspicious use of SetWindowsHookEx

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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2992 -s 272

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 19:15

Reported

2024-06-14 19:17

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

150s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1568 wrote to memory of 384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1568 wrote to memory of 384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1568 wrote to memory of 384 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\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a8aae8f568304e455830361114151258a2d2f24e2659f23249ef2747db9ac4a.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 28.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 200.79.70.13.in-addr.arpa udp

Files

N/A