ET MALWARE Win32/Gasti.tm Checkin Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Gasti.tm Checkin Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|blob|22 0d 0a|"; fast_pattern;
    content:"name|3d 22|blob|5f|num|22 0d 0a|"; distance:0;
    content:"name|3d 22|blob|5f|num|22|name|3d 22|total|5f|blob|5f|num|22 0d 0a|"; distance:0;
    content:"name|3d 22|hashCode|22 0d 0a 0d 0a|";
    content:"|0d 0a 2d 2d|"; distance:32; within:4;
    reference:md5,0b7504c8770d109f0bc326c1dd4cbee4;
    classtype:command-and-control;
    sid:2034678; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_13, deployment Perimeter, malware_family Win32_Gasti_tm, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_13;
)