ET MALWARE Orca RAT URI Struct 3

Query · suricata

flow:established,to_server;
http.uri;
content:"=1/"; fast_pattern;
pcre:"/^\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?$/";
http.user_agent;
pcre:"/(?: MSIE |rv\x3a11)/i";
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept-Encoding|0d 0a|";
Raw source ET MALWARE Orca RAT URI Struct 3 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Orca RAT URI Struct 3";
    flow:established,to_server;
    http.uri;
    content:"=1/"; fast_pattern;
    pcre:"/^\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?\/[A-Za-z0-9+~]+(?:=[1-2])?$/";
    http.user_agent;
    pcre:"/(?: MSIE |rv\x3a11)/i";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept-Encoding|0d 0a|";
    reference:url,pwc.blogs.com/cyber_security_updates/2014/10/orcarat-a-whale-of-a-tale.html;
    classtype:trojan-activity;
    sid:2019483; rev:4;
    metadata:created_at 2014_10_21, signature_severity Major, updated_at 2020_09_25;
)

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