[WINDOWS-POWERSHELL] DNSCAT VPN over DNS start up detected *CRITICAL AND CALL*

alert any $HOME_NET any -> $EXTERNAL_NET any (msg:"[WINDOWS-POWERSHELL] DNSCAT VPN over DNS start up detected *CRITICAL 
AND CALL*"; json_map:"event_id",".EventID"; json_map:"message",".RenderedDescription"; event_id: 4104; program: *PowerShell*; content: "Start
| 2D
| Dnscat2"; nocase; classtype: suspicious-command; reference: url,github.com/SigmaHQ/sigma/blob/master/rules/powershell; reference: url,github.com/iagox86/dnscat2; sid:5009312; metadata: created_on 2022_11_22, old_sid 5005754; rev:1;)