Malware Analysis Report

2024-12-07 16:15

Sample ID 241113-lmlpmasnhr
Target WindowsUPD.ps1
SHA256 8287d54c83db03b8adcdf1409f5d1c9abb1693ac8d000b5ae75b3a296cb3061c
Tags
execution persistence
score
8/10

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
8/10

SHA256

8287d54c83db03b8adcdf1409f5d1c9abb1693ac8d000b5ae75b3a296cb3061c

Threat Level: Likely malicious

The file WindowsUPD.ps1 was found to be: Likely malicious.

Malicious Activity Summary

execution persistence

Blocklisted process makes network request

Adds Run key to start application

Command and Scripting Interpreter: PowerShell

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 09:39

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 09:39

Reported

2024-11-13 09:41

Platform

win7-20241010-en

Max time kernel

122s

Max time network

126s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\WindowsUPD.ps1

Signatures

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\powershell = "Powershell.exe -windowstyle hidden -ExecutionPolicy Bypass -File \"C:\\Users\\Admin\\AppData\\Local\\Temp\\WindowsUPD.ps1\"" C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\WindowsUPD.ps1

Network

Country Destination Domain Proto
US 94.158.244.69:443 tcp

Files

memory/844-4-0x000007FEF58FE000-0x000007FEF58FF000-memory.dmp

memory/844-5-0x000000001B370000-0x000000001B652000-memory.dmp

memory/844-7-0x0000000001F30000-0x0000000001F38000-memory.dmp

memory/844-6-0x000007FEF5640000-0x000007FEF5FDD000-memory.dmp

memory/844-8-0x000007FEF5640000-0x000007FEF5FDD000-memory.dmp

memory/844-9-0x000007FEF5640000-0x000007FEF5FDD000-memory.dmp

memory/844-10-0x000007FEF5640000-0x000007FEF5FDD000-memory.dmp

memory/844-11-0x000007FEF58FE000-0x000007FEF58FF000-memory.dmp

memory/844-12-0x000007FEF5640000-0x000007FEF5FDD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 09:39

Reported

2024-11-13 09:41

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

134s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\WindowsUPD.ps1

Signatures

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\powershell = "Powershell.exe -windowstyle hidden -ExecutionPolicy Bypass -File \"C:\\Users\\Admin\\AppData\\Local\\Temp\\WindowsUPD.ps1\"" C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\WindowsUPD.ps1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 94.158.244.69:443 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.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

Files

memory/4344-0-0x00007FFA484F3000-0x00007FFA484F5000-memory.dmp

memory/4344-1-0x000001D2E4200000-0x000001D2E4222000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_maafpx4e.hlx.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4344-11-0x00007FFA484F0000-0x00007FFA48FB1000-memory.dmp

memory/4344-12-0x00007FFA484F0000-0x00007FFA48FB1000-memory.dmp

memory/4344-13-0x00007FFA484F0000-0x00007FFA48FB1000-memory.dmp

memory/4344-14-0x00007FFA484F3000-0x00007FFA484F5000-memory.dmp

memory/4344-15-0x00007FFA484F0000-0x00007FFA48FB1000-memory.dmp