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[WINDOWS-POWERSHELL] Powershell Possible Downgrade Attempt

[WINDOWS-POWERSHELL] Powershell Possible Downgrade Attempt

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Detection Logic

alert any $HOME_NET any -> $EXTERNAL_NET any (msg:"[WINDOWS-POWERSHELL] Powershell Possible Downgrade Attempt"; event_id: 800,4104; program: *PowerShell*; content: "PowerShell
| 2D
| Version"; pcre: "/PowerShell
| 2D
| Version [0-6]/"; classtype: suspicious-command; reference: url,github.com/SigmaHQ/sigma/blob/master/rules/powershell; sid:5005755; rev:1; metadata:updated_at 2023_10_10, mitre_tactic_id TA0005, mitre_technique_id T1562.010;)

Field Validations

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