ET MALWARE Gozi/Ursnif/Papras Connectivity Check

Query · suricata

flow:established,to_server;
urilen:13;
http.method;
content:"GET";
http.uri;
content:"/usdeclar.txt"; fast_pattern;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
Raw source ET MALWARE Gozi/Ursnif/Papras Connectivity Check · 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 Gozi/Ursnif/Papras Connectivity Check";
    flow:established,to_server;
    urilen:13;
    http.method;
    content:"GET";
    http.uri;
    content:"/usdeclar.txt"; fast_pattern;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,5f3530edbe1fce44e05ad0c96e54efb4;
    reference:md5,279fc5e6181d58f883a15d5089ce541b;
    reference:url,krebsonsecurity.com/2013/01/three-men-charged-in-connection-with-gozi-trojan/;
    reference:url,csis.dk/en/csis/news/4472/;
    classtype:trojan-activity;
    sid:2019380; rev:6;
    metadata:created_at 2014_10_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_25;
)

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