mirror of
https://github.com/valitydev/SigmaHQ.git
synced 2024-11-08 02:08:54 +00:00
924e1feb54
* Added UUIDs to all contributed rules * Moved unsupported logic directory out of rules/ because this breaks CI testing.
45 lines
1.4 KiB
YAML
45 lines
1.4 KiB
YAML
action: global
|
|
title: Invoke-Obfuscation obfuscated IEX invocation
|
|
id: 51aa9387-1c53-4153-91cc-d73c59ae1ca9
|
|
description: "Detects all variations of obfuscated powershell IEX invocation code generated by Invoke-Obfuscation framework from the following code block \u2014 https://github.com/danielbohannon/Invoke-Obfuscation/blob/master/Out-ObfuscatedStringCommand.ps1#L873-L888"
|
|
status: experimental
|
|
author: Daniel Bohannon (@Mandiant/@FireEye), oscd.community
|
|
date: 2019/11/08
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1027
|
|
falsepositives:
|
|
- Unknown
|
|
level: high
|
|
detection:
|
|
selection:
|
|
- ImagePath|re: '\$PSHome\[\s*\d{1,3}\s*\]\s*\+\s*\$PSHome\['
|
|
- ImagePath|re: '\$ShellId\[\s*\d{1,3}\s*\]\s*\+\s*\$ShellId\['
|
|
- ImagePath|re: '\$env:Public\[\s*\d{1,3}\s*\]\s*\+\s*\$env:Public\['
|
|
- ImagePath|re: '\$env:ComSpec\[(\s*\d{1,3}\s*,){2}'
|
|
- ImagePath|re: '\*mdr\*\W\s*\)\.Name'
|
|
- ImagePath|re: '\$VerbosePreference\.ToString\('
|
|
- ImagePath|re: '\String\]\s*\$VerbosePreference'
|
|
condition: selection
|
|
---
|
|
logsource:
|
|
product: windows
|
|
service: system
|
|
detection:
|
|
selection:
|
|
EventID: 7045
|
|
---
|
|
logsource:
|
|
product: windows
|
|
service: sysmon
|
|
detection:
|
|
selection:
|
|
EventID: 6
|
|
---
|
|
logsource:
|
|
product: windows
|
|
service: security
|
|
detection:
|
|
selection:
|
|
EventID: 4697
|