ET MALWARE FAKBEN Ransomware

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE FAKBEN Ransomware";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?btc="; nocase; fast_pattern;
    content:"&wid="; nocase; distance:0;
    content:"|3a|TWljcm9zb2Z0IFdpbmR"; distance:0;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    reference:md5,c952a88edc0766adf819b30cd2683ac7;
    classtype:trojan-activity;
    sid:2022283; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2015_12_18, deployment Perimeter, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_10, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)