ET MOBILE_MALWARE Trojan-Dropper.AndroidOS.Anatsa Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MOBILE_MALWARE Trojan-Dropper.AndroidOS.Anatsa Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/update"; fast_pattern;
    isdataat:!1,relative;
    http.user_agent;
    content:"|3b 20|Android|20|";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    http.request_body;
    content:"{|22|hwid|22 3a|"; depth:8;
    content:",|22|phone_name|22 3a|";
    content:",|22|update_installed|22 3a|";
    reference:md5,4a01cad9af92247b828478d5e1b3e00d;
    reference:url,www.threatfabric.com/blogs/deceive-the-heavens-to-cross-the-sea.html;
    classtype:command-and-control;
    sid:2034591; rev:3;
    metadata:attack_target Mobile_Client, created_at 2021_12_07, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)