Malware Analysis Report

2025-05-28 18:10

Sample ID 241109-zwqxlavncl
Target 87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N
SHA256 87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3
Tags
discovery persistence
score
7/10

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
7/10

SHA256

87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3

Threat Level: Shows suspicious behavior

The file 87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence

Executes dropped EXE

Deletes itself

Adds Run key to start application

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 21:04

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 21:04

Reported

2024-11-09 21:06

Platform

win7-20240903-en

Max time kernel

119s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe"

Signatures

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe

"C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2492-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 3e51a0d08b89ba5ee9cb9af46373e413
SHA1 dc42013aaa4753ba052354710edc768b945222a5
SHA256 7a32394f12855d10cf52a8ef5b2d1929ffca109e062b1fb975160f0f21e6ad8a
SHA512 5febf8514016685f1e9bb83b979df727eec80b854e10789db21774acc6485233e37455b8f36e47b6de48d04dac912ee16dca6de7a443d6003b3113a6eda8d899

memory/1264-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2492-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1264-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 21:04

Reported

2024-11-09 21:06

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe"

Signatures

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\microsofthelp.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe

"C:\Users\Admin\AppData\Local\Temp\87d8fb634bfce482777dce52e5a4dab627da625bf54b09134da7e22a1ff53be3N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 67.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/2440-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2440-5-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 3e51a0d08b89ba5ee9cb9af46373e413
SHA1 dc42013aaa4753ba052354710edc768b945222a5
SHA256 7a32394f12855d10cf52a8ef5b2d1929ffca109e062b1fb975160f0f21e6ad8a
SHA512 5febf8514016685f1e9bb83b979df727eec80b854e10789db21774acc6485233e37455b8f36e47b6de48d04dac912ee16dca6de7a443d6003b3113a6eda8d899

memory/1316-7-0x0000000000400000-0x000000000040E000-memory.dmp