Malware Analysis Report

2025-08-05 12:51

Sample ID 240509-br5cesaf3s
Target 39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe
SHA256 39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6
Tags
bootkit persistence
score
9/10

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
9/10

SHA256

39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6

Threat Level: Likely malicious

The file 39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe was found to be: Likely malicious.

Malicious Activity Summary

bootkit persistence

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Writes to the Master Boot Record (MBR)

Unsigned PE

Program crash

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 01:23

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 01:23

Reported

2024-05-09 01:26

Platform

win7-20240221-en

Max time kernel

140s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe"

Signatures

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe

"C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe"

Network

N/A

Files

memory/664-0-0x0000000000230000-0x0000000000231000-memory.dmp

memory/664-1-0x0000000003030000-0x00000000030B0000-memory.dmp

memory/664-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/664-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/664-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/664-6-0x0000000000230000-0x0000000000231000-memory.dmp

memory/664-7-0x0000000000400000-0x000000000046F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 01:23

Reported

2024-05-09 01:26

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe"

Signatures

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe

"C:\Users\Admin\AppData\Local\Temp\39af1ce83c85e15f167cdef74aa9e23af9fb2942561b16491d23bc6044efe0b6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2044 -ip 2044

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 700

Network

Country Destination Domain Proto
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 200.201.50.20.in-addr.arpa udp

Files

memory/2044-0-0x00000000006A0000-0x00000000006A1000-memory.dmp

memory/2044-1-0x0000000002380000-0x0000000002400000-memory.dmp

memory/2044-2-0x0000000000400000-0x000000000046F000-memory.dmp

memory/2044-3-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/2044-4-0x0000000000400000-0x00000000004EE000-memory.dmp

memory/2044-7-0x0000000000400000-0x000000000046F000-memory.dmp