ET EXPLOIT Linksys E-Series Device RCE Attempt Outbound

alert http any any -> $EXTERNAL_NET any (
    msg:"ET EXPLOIT Linksys E-Series Device RCE Attempt Outbound";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:".cgi";
    http.request_body;
    content:"ttcp_ip=";
    content:"-h"; distance:0;
    content:"&ttcp_num="; fast_pattern;
    reference:url,www.exploit-db.com/exploits/31683/;
    reference:url,researchcenter.paloaltonetworks.com/2018/09/unit42-multi-exploit-iotlinux-botnets-mirai-gafgyt-target-apache-struts-sonicwall/;
    classtype:attempted-admin;
    sid:2027153; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2019_04_04, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_28;
)