ET MALWARE Win32/Tesch.B CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Tesch.B CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php";
    http.user_agent; bsize:18;
    content:"Internet  Explorer"; fast_pattern;
    http.request_body;
    pcre:"/^[a-f0-9]+(?:\x20[a-f0-9]+)+$/";
    http.header_names;
    content:!"|0d 0a|Accept";
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,0032395c3a980e09c511b6b41ab3da48;
    classtype:command-and-control;
    sid:2020945; rev:6;
    metadata:attack_target Client_Endpoint, created_at 2015_04_17, deployment Perimeter, malware_family Win32_Tesch_B, signature_severity Major, tag c2, updated_at 2024_03_10, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)