ET MALWARE Win32/Teslacrypt Ransomware HTTP CnC Beacon M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Teslacrypt Ransomware HTTP CnC Beacon M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/state"; fast_pattern;
    content:".php?";
    pcre:"/\/state[^\x2f]*\.php\?[A-Za-z0-9+/]*={0,2}$/";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,c075fa8484d52c3978826c2f07ce9a9c;
    classtype:command-and-control;
    sid:2020717; rev:7;
    metadata:attack_target Client_Endpoint, created_at 2015_03_20, deployment Perimeter, malware_family Win32_Teslacrypt, signature_severity Major, tag c2, updated_at 2020_09_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)