ET MALWARE W32/Farfli.BHQ!tr Dropper CnC Beacon 2

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/do.asp?search="; fast_pattern;
http.header;
pcre:"/^Host\x3A\x20\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x3A\d{1,5}\r?$/mi";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE W32/Farfli.BHQ!tr Dropper CnC Beacon 2 · 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 -> $EXTERNAL_NET !80 (
    msg:"ET MALWARE W32/Farfli.BHQ!tr Dropper CnC Beacon 2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/do.asp?search="; fast_pattern;
    http.header;
    pcre:"/^Host\x3A\x20\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x3A\d{1,5}\r?$/mi";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,93be88ad3816c19d74155f8cd3aae1d2;
    classtype:command-and-control;
    sid:2020913; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_04_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_11_19, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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