ET MALWARE Win32/0xtaRAT CnC Activity M2 (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/0xtaRAT CnC Activity M2 (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"|2e|php|3f|GUID|3d|"; fast_pattern;
    pcre:"/^(?P<guid>[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12})(?P=guid)?\&/R";
    content:"SYS="; distance:0;
    content:"|7c|";
    content:"|7c|"; distance:0;
    reference:url,research.checkpoint.com/2023/operation-silent-watch-desktop-surveillance-in-azerbaijan-and-armenia;
    classtype:trojan-activity;
    sid:2044291; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_21, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_0xtaRAT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_08, reviewed_at 2024_01_26;
    target:src_ip;
)