ET MOBILE_MALWARE ITW Android Post-Exploit Downloader CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MOBILE_MALWARE ITW Android Post-Exploit Downloader CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api2/v9/pass"; bsize:13; fast_pattern;
    http.content_type;
    content:"application/octet-stream"; bsize:24;
    reference:url,googleprojectzero.blogspot.com/2021/01/in-wild-series-android-post-exploitation.html;
    classtype:command-and-control;
    sid:2031525; rev:2;
    metadata:affected_product Android, attack_target Client_Endpoint, created_at 2021_01_14, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_15;
)