Malware Analysis Report

2025-05-28 18:12

Sample ID 241109-zsq37avmgj
Target c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN
SHA256 c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18a
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

c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18a

Threat Level: Shows suspicious behavior

The file c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN 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

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 20:59

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 20:59

Reported

2024-11-09 21:01

Platform

win7-20240903-en

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe

"C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2268-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0786d204e1ec24a4015605eae07b199b
SHA1 9e689c164fcf3276b46f1d2539732758d7761137
SHA256 c8a9aa875d27705ceb39bb47b08609f267be4792825a8a6aea943867fd3a7a2f
SHA512 c477887f200832a20f200dcbf7c7f10f6602fcabcb8b761625e6ee97bbb52577c51ff62be3247f8afd5f15dc15754fc593cca6eb951f8f88b1fe2ef90e9873ba

memory/2360-8-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2268-6-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2360-10-0x0000000000400000-0x000000000040F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 20:59

Reported

2024-11-09 21:01

Platform

win10v2004-20241007-en

Max time kernel

120s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.exe

"C:\Users\Admin\AppData\Local\Temp\c499fb0bb29f94bba2402b3f9af126daf6dde4f2fdbb25807ebf4932a083c18aN.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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 99.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/2288-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0786d204e1ec24a4015605eae07b199b
SHA1 9e689c164fcf3276b46f1d2539732758d7761137
SHA256 c8a9aa875d27705ceb39bb47b08609f267be4792825a8a6aea943867fd3a7a2f
SHA512 c477887f200832a20f200dcbf7c7f10f6602fcabcb8b761625e6ee97bbb52577c51ff62be3247f8afd5f15dc15754fc593cca6eb951f8f88b1fe2ef90e9873ba

memory/2288-4-0x0000000000400000-0x000000000040F000-memory.dmp

memory/1168-6-0x0000000000400000-0x000000000040F000-memory.dmp