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update: removed unnecessary selection part #4693

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Jan 26, 2024
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update: removed unnecessary selection part #4693

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6 changes: 2 additions & 4 deletions rules/windows/powershell/powershell_script/posh_ps_shellcode_b64.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ references:
- https://twitter.com/cyb3rops/status/1063072865992523776
author: David Ledbetter (shellcode), Florian Roth (Nextron Systems)
date: 2018/11/17
modified: 2022/12/25
modified: 2024/01/25
tags:
- attack.defense_evasion
- attack.privilege_escalation
Expand All @@ -19,12 +19,10 @@ logsource:
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection:
ScriptBlockText|contains: 'AAAAYInlM'
selection2:
ScriptBlockText|contains:
- 'OiCAAAAYInlM'
- 'OiJAAAAYInlM'
condition: selection and selection2
condition: selection
falsepositives:
- Unknown
level: high