Malware Analysis Report

2025-05-06 00:31

Sample ID 241109-1kd94ashnq
Target 77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN
SHA256 77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312a
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

77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312a

Threat Level: Shows suspicious behavior

The file 77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN 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 21:42

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 21:42

Reported

2024-11-09 21:44

Platform

win7-20240903-en

Max time kernel

119s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe

"C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1868-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 67a945a414391d3d79212300849e6806
SHA1 0e14cc0ee7c2339046bca2a8a493b02813084f13
SHA256 50274f2a93dc2116f59a89caf7bb5566161060171de81fd8062197a5c8a5dbd1
SHA512 36e0b913e14aeec3428873197d2ff8cdd958c8d51c0084d10cc163ffbba65808297281cf7958f20aca33e77a1e9c3fbdfdce029721e93701b0f3773d46657205

memory/1868-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1780-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1780-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 21:42

Reported

2024-11-09 21:44

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.exe

"C:\Users\Admin\AppData\Local\Temp\77d943da7db845a99d567b66eac39c2620a08fafc8bece62e51125ed83b2312aN.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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 72.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 106.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/1864-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 67a945a414391d3d79212300849e6806
SHA1 0e14cc0ee7c2339046bca2a8a493b02813084f13
SHA256 50274f2a93dc2116f59a89caf7bb5566161060171de81fd8062197a5c8a5dbd1
SHA512 36e0b913e14aeec3428873197d2ff8cdd958c8d51c0084d10cc163ffbba65808297281cf7958f20aca33e77a1e9c3fbdfdce029721e93701b0f3773d46657205

memory/1864-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/4480-7-0x0000000000400000-0x000000000040E000-memory.dmp