ET MALWARE MuddyWater Payload - CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MuddyWater Payload - CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?ac="; fast_pattern;
    content:"&n="; distance:1; within:3;
    content:"|3a|"; distance:0;
    content:"|3a|"; distance:0;
    content:"-bit|29|"; distance:0;
    http.accept;
    content:"*/*"; bsize:3;
    http.accept_lang;
    content:"en-us"; bsize:5;
    classtype:command-and-control;
    sid:2029039; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_21, deployment Perimeter, malware_family MuddyWater, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_11_21;
)