alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Unknown Vulnerability Exploit Attempt (Possible Mirai Activity)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/cgi-bin/"; startswith; http.request_body; content:"key=|27 3b 60|"; startswith; fast_pattern; content:"wget"; distance:0; reference:url,unit42.paloaltonetworks.com/mirai-variant-iot-vulnerabilities/; classtype:attempted-admin; sid:2033273; rev:1; metadata:attack_target Server, created_at 2021_07_07, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_07_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)