Malware Analysis Report

2025-03-14 22:45

Sample ID 240406-1m7z7acf49
Target 656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f
SHA256 656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f
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

656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f

Threat Level: Shows suspicious behavior

The file 656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f 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 21:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-06 21:47

Reported

2024-04-06 21:49

Platform

win7-20240220-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe

"C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1992-0-0x0000000000400000-0x0000000000402000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 b9fb2d539b472530046f6725ff1db1f9
SHA1 0c1db7b2e280c697e7595403ca5488a2fde6077f
SHA256 d1477d930f1086f1a5771cd5f07acbe450d0a7262e488315124669a1afed54e0
SHA512 06ddddbb90ed851eb0962a08fd4824e717ef8d796d80c11c4bb54cd125631c50ec94dee17472426b8f421b29a823bc715df9a6cd39a0aa434e8ed54f8ef8ce4d

memory/1992-3-0x0000000000220000-0x0000000000222000-memory.dmp

memory/2224-8-0x0000000000400000-0x0000000000402000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 21:47

Reported

2024-04-06 21:49

Platform

win10v2004-20240319-en

Max time kernel

151s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.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-1-5-21-817259280-2658881748-983986378-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe

"C:\Users\Admin\AppData\Local\Temp\656d295e68695517914de279cc91e877a1382481615e3f809686aed94a96922f.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2244,i,11986678581565715302,451159359636456336,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
DE 172.217.18.106:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 106.18.217.172.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 202.77.24.184.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/2052-0-0x0000000000400000-0x0000000000402000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 b9fb2d539b472530046f6725ff1db1f9
SHA1 0c1db7b2e280c697e7595403ca5488a2fde6077f
SHA256 d1477d930f1086f1a5771cd5f07acbe450d0a7262e488315124669a1afed54e0
SHA512 06ddddbb90ed851eb0962a08fd4824e717ef8d796d80c11c4bb54cd125631c50ec94dee17472426b8f421b29a823bc715df9a6cd39a0aa434e8ed54f8ef8ce4d