alert http [$HOME_NET,$HTTP_SERVERS] any -> any any (msg:"ET EXPLOIT Trenda Router AC11 RCE Outbound (CVE-2021-31755)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/goform/setmac"; fast_pattern; http.request_body; content:"&mac="; content:"|3b|"; distance:0; within:40; reference:url,www.fortinet.com/blog/threat-research/the-ghosts-of-mirai; reference:cve,2021-31755; classtype:attempted-admin; sid:2033285; rev:1; metadata:created_at 2021_07_08, cve CVE_2021_31755, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_08;)