ET MALWARE Trojan:Win32/WinLNK.APA!MTB Payload Request

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Trojan:Win32/WinLNK.APA!MTB Payload Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.request_line;
    content:"|7e 7e 2f| HTTP|2f|1|2e|1"; endswith; bsize:99; fast_pattern;
    http.uri;
    pcre:"/^(?:\x2f[A-Za-z0-9]{10}\x2f[A-Za-z0-9_-]{34}\x7e\x7e\x2f[A-Za-z0-9_-]{34}\x7e\x7e\x2f$)$/"; bsize:86;
    http.host;
    pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
    http.user_agent;
    content:"curl"; startswith;
    http.header_names;
    content:!"Referer";
    reference:md5,4d5c65cb916244375eacde678148334b;
    reference:url,twitter.com/pr0xylife/status/1561737165255725057;
    classtype:trojan-activity;
    sid:2038597; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_23, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_23, reviewed_at 2025_10_24;
)