ET MALWARE IcedID WebSocket Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/data2.php?";
pcre:"/^[A-F0-9]{16}$/R";
http.header;
content:"Upgrade|3a 20|websocket|0d 0a|Connection|3a 20|Upgrade|0d 0a|"; endswith;
http.header_names;
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE IcedID WebSocket Request · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE IcedID WebSocket Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/data2.php?";
    pcre:"/^[A-F0-9]{16}$/R";
    http.header;
    content:"Upgrade|3a 20|websocket|0d 0a|Connection|3a 20|Upgrade|0d 0a|"; endswith;
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    reference:md5,b17a729efb71d1781405c6c00052c85e;
    classtype:trojan-activity;
    sid:2026673; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_29, deployment Perimeter, malware_family IcedID, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;
)

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