frack113
38 lines
1.2 KiB
YAML
38 lines
1.2 KiB
YAML
title: Suspicious PowerShell Command Line
|
|
id: d7bcd677-645d-4691-a8d4-7a5602b780d1
|
|
status: test
|
|
description: Detects the PowerShell command lines with special characters
|
|
author: Teymur Kheirkhabarov (idea), Vasiliy Burov (rule), oscd.community
|
|
references:
|
|
- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=64
|
|
date: 2020/10/15
|
|
modified: 2021/11/27
|
|
logsource:
|
|
category: process_creation
|
|
product: windows
|
|
detection:
|
|
selection1:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|re: '.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*'
|
|
selection2:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|re: '.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*'
|
|
selection3:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|re: '.*{.*{.*{.*{.*{.*'
|
|
selection4:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|re: '.*\^.*\^.*\^.*\^.*\^.*'
|
|
selection5:
|
|
Image|endswith: '\powershell.exe'
|
|
CommandLine|re: '.*`.*`.*`.*`.*`.*'
|
|
condition: selection1 or selection2 or selection3 or selection4 or selection5
|
|
falsepositives:
|
|
- Unlikely
|
|
level: high
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1027
|
|
- attack.execution
|
|
- attack.t1059.001
|