ET MALWARE Dalexis Downloading EXE

Query · suricata

flow:established,to_server;
http.uri;
content:".jpg"; endswith;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0)"; fast_pattern;
http.connection;
content:"Close"; bsize:5;
http.header_names;
content:!"Accept";
content:!"Referer";
Raw source ET MALWARE Dalexis Downloading EXE · 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 Dalexis Downloading EXE";
    flow:established,to_server;
    http.uri;
    content:".jpg"; endswith;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 6.0)"; fast_pattern;
    http.connection;
    content:"Close"; bsize:5;
    http.header_names;
    content:!"Accept";
    content:!"Referer";
    classtype:trojan-activity;
    sid:2021017; rev:3;
    metadata:created_at 2015_04_28, signature_severity Major, updated_at 2020_05_21;
)

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