Malware Analysis Report

2025-04-03 13:05

Sample ID 241109-1vq2mstblh
Target b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N
SHA256 b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7
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

b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7

Threat Level: Shows suspicious behavior

The file b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence

Deletes itself

Executes dropped EXE

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 21:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 21:58

Reported

2024-11-09 22:00

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.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\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe

"C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2268-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 18cd75ec7055e795d9e2670aca02fc3f
SHA1 d935ffcd200828c533639af3b5788c7c8ba11c50
SHA256 e39ed6608ca9493208189b81e44f8a2caf323e96d0cba08881032b02185ac6ab
SHA512 6530e0f8a7535ffc28617735d94eb2a2ad57ad54e57961e567de1a566ede6003ad0a7937ee6fb2e1f53509709a3544a2e0c455cadb58854968d28405503c9e40

memory/2268-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2692-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2692-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 21:58

Reported

2024-11-09 22:00

Platform

win10v2004-20241007-en

Max time kernel

120s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.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:\Windows\microsofthelp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe

"C:\Users\Admin\AppData\Local\Temp\b673172d8ace2327ebab9999782e5e764b1a96d63efbd3bbd990d69654727ad7N.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 98.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/3992-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 18cd75ec7055e795d9e2670aca02fc3f
SHA1 d935ffcd200828c533639af3b5788c7c8ba11c50
SHA256 e39ed6608ca9493208189b81e44f8a2caf323e96d0cba08881032b02185ac6ab
SHA512 6530e0f8a7535ffc28617735d94eb2a2ad57ad54e57961e567de1a566ede6003ad0a7937ee6fb2e1f53509709a3544a2e0c455cadb58854968d28405503c9e40

memory/3992-4-0x0000000000400000-0x000000000040E000-memory.dmp

memory/3732-6-0x0000000000400000-0x000000000040E000-memory.dmp