ET MALWARE AtlasAgent Activity (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE AtlasAgent Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/orders?session="; startswith; fast_pattern;
    content:"--"; endswith; within:20;
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|"; startswith;
    content:!"Referer";
    reference:md5,ba85467ceff628be8b4f0e2da2a5990c;
    reference:url,nsfocusglobal.com/warning-newly-discovered-apt-attacker-atlascross-exploits-red-cross-blood-drive-phishing-for-cyberattack/;
    classtype:command-and-control;
    sid:2048358; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_09_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_29, reviewed_at 2023_09_29;
    target:src_ip;
)