ET MALWARE IrcBot Downloading .old

Query · suricata

flow:established,to_server;
http.start;
content:".old|20|HTTP/1.1|0d 0a|Host"; fast_pattern;
http.header_names;
content:!"User-Agent";
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE IrcBot Downloading .old · 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 IrcBot Downloading .old";
    flow:established,to_server;
    http.start;
    content:".old|20|HTTP/1.1|0d 0a|Host"; fast_pattern;
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    content:!"Accept";
    reference:md5,ca6208a4dd3f1f846aaaf4a6cbcc66ea;
    classtype:trojan-activity;
    sid:2022657; rev:4;
    metadata:created_at 2016_03_24, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_05;
)

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