alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Possible Vacron NVR Remote Command Execution M2"; flow:to_server,established; http.uri; content:"/board.cgi"; fast_pattern; http.request_body; content:"cmd="; depth:4; pcre:"/[^&]*(?:\x60|\x24)/R"; reference:url,blogs.securiteam.com/index.php/archives/3445; reference:url,researchcenter.paloaltonetworks.com/2018/09/unit42-multi-exploit-iotlinux-botnets-mirai-gafgyt-target-apache-struts-sonicwall/; classtype:attempted-admin; sid:2026103; rev:3; metadata:attack_target Networking_Equipment, created_at 2018_09_10, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25;)