ET MALWARE Win32/Voltron/Spectre Stealer Sending OS Information (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Voltron/Spectre Stealer Sending OS Information (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/v4/api_t.php"; bsize:13; fast_pattern;
    http.user_agent;
    content:"UserAgent"; bsize:9;
    http.request_body;
    content:"id="; startswith;
    content:"&mid="; distance:0;
    content:"&username="; distance:0;
    content:"&os_info="; distance:0;
    content:"&version="; distance:0;
    content:"&computername="; distance:0;
    content:"&memory="; distance:0;
    content:"&screen="; distance:0;
    content:"&drives="; distance:0;
    http.header_names;
    content:!"Referer";
    classtype:trojan-activity;
    sid:2034040; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_09_17, deployment Perimeter, malware_family Win32_Voltron_Spectre, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_17;
)