ET HUNTING Suspicious Proxifier DL (non-browser observed in maldoc campaigns)

Query · suricata

flow:established,to_server;
http.uri;
content:"/distr/Proxifier"; nocase; depth:16; fast_pattern;
http.host;
content:"proxifier.com"; endswith;
http.header_names;
content:!"User-Agent|0d 0a|"; nocase;
content:!"Referer|0d 0a|";
content:!"Accept-";
content:!"Cookie|0d 0a|";
Raw source ET HUNTING Suspicious Proxifier DL (non-browser observed in maldoc campaigns) · 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 HUNTING Suspicious Proxifier DL (non-browser observed in maldoc campaigns)";
    flow:established,to_server;
    http.uri;
    content:"/distr/Proxifier"; nocase; depth:16; fast_pattern;
    http.host;
    content:"proxifier.com"; endswith;
    http.header_names;
    content:!"User-Agent|0d 0a|"; nocase;
    content:!"Referer|0d 0a|";
    content:!"Accept-";
    content:!"Cookie|0d 0a|";
    reference:md5,2a0728a6edab6921520a93e10a86d4b2;
    classtype:trojan-activity;
    sid:2023138; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_08_26, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag MalDoc, updated_at 2020_11_05;
)

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