ET MALWARE NOBELIUM Win32/VaporRage Loader CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE NOBELIUM Win32/VaporRage Loader CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/class-chll.php?session_info=60";
    content:"5d"; distance:0;
    content:"&session="; distance:0;
    content:"&view_type=12"; endswith;
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4183.83 Safari/537.36"; bsize:102; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    content:!"Cache-";
    reference:url,www.microsoft.com/security/blog/2021/05/28/breaking-down-nobeliums-latest-early-stage-toolset;
    classtype:trojan-activity;
    sid:2033057; rev:2;
    metadata:created_at 2021_06_01, malware_family Win32_VaporRage, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_24, reviewed_at 2024_03_06;
)