ET MALWARE TA410 APT LookBack Client HTTP Activity (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE TA410 APT LookBack Client HTTP Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/status.php?r=";
    http.accept;
    content:"text/html, application/xhtml+xml, */*"; bsize:37;
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.accept_enc;
    content:"gzip, deflate"; bsize:13;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Connection|0d 0a|Cache-Control|0d 0a 0d 0a|"; endswith;
    http.request_body;
    content:"id=1&op=report&status="; fast_pattern; startswith;
    reference:url,www.welivesecurity.com/2022/04/27/lookback-ta410-umbrella-cyberespionage-ttps-activity/;
    classtype:trojan-activity;
    sid:2036412; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_04_28, deployment Perimeter, malware_family TA410, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_28;
)