Malware Analysis Report

2025-03-14 22:35

Sample ID 240406-2cfnmacg5z
Target 76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3
SHA256 76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3
Tags
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

76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3

Threat Level: Shows suspicious behavior

The file 76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3 was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence

Deletes itself

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 22:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-06 22:25

Reported

2024-04-06 22:28

Platform

win7-20240221-en

Max time kernel

152s

Max time network

131s

Command Line

"C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.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-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe

"C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1728-0-0x0000000000400000-0x0000000000402000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 697e042996d814ff43104ada01a07f80
SHA1 cd068d7b25d9048940b9216e869351a4ae279a26
SHA256 88231ba8de95f3434b144fd845804c9639453ae3867bc11c356b3d2a907b76c3
SHA512 0e25b68a332887c0cc2e99febaf9d3bea8ec5691c16841de5c7da0c0e8be65ec72ba25b07a09aa59835f8f35cbb6104ffe1899a811c219bc6bc5ccba9765820b

memory/1740-7-0x0000000000400000-0x0000000000402000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 22:25

Reported

2024-04-06 22:28

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.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-1-5-21-983155329-280873152-1838004294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe

"C:\Users\Admin\AppData\Local\Temp\76cde137fb09567e623b7033ee2e121d87d2f01eba2af5e83a07a0ca52f13af3.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 171.117.168.52.in-addr.arpa udp

Files

memory/1932-0-0x0000000000400000-0x0000000000402000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 697e042996d814ff43104ada01a07f80
SHA1 cd068d7b25d9048940b9216e869351a4ae279a26
SHA256 88231ba8de95f3434b144fd845804c9639453ae3867bc11c356b3d2a907b76c3
SHA512 0e25b68a332887c0cc2e99febaf9d3bea8ec5691c16841de5c7da0c0e8be65ec72ba25b07a09aa59835f8f35cbb6104ffe1899a811c219bc6bc5ccba9765820b