ET MALWARE Ursnif Payload Request (cook32.rar)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/cook32.rar"; endswith; fast_pattern;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Ursnif Payload Request (cook32.rar) · 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 Ursnif Payload Request (cook32.rar)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/cook32.rar"; endswith; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:url,github.com/stamparm/maltrail/blob/master/trails/static/malware/ursnif.txt;
    reference:md5,c453d38c87a5df2fff509a4d9aba40e8;
    classtype:trojan-activity;
    sid:2031743; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2021_03_02, malware_family ursnif, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_02;
)

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