ET HUNTING Suspicious BITS EXE DL From Dotted Quad

Query · suricata

flow:established,to_server;
http.uri;
content:".exe"; nocase;
content:!".gvt1.com/";
http.user_agent;
content:"Microsoft BITS/"; depth:15; fast_pattern;
http.host;
content:!"download.windowsupdate.com";
content:!"download.adobe.com";
pcre:"/^(?:\d{1,3}\.){3}\d{1,3}(?:\x3a\d{1,5})?$/";
Raw source ET HUNTING Suspicious BITS EXE DL From Dotted Quad · 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 -> $EXTERNAL_NET any (
    msg:"ET HUNTING Suspicious BITS EXE DL From Dotted Quad";
    flow:established,to_server;
    http.uri;
    content:".exe"; nocase;
    content:!".gvt1.com/";
    http.user_agent;
    content:"Microsoft BITS/"; depth:15; fast_pattern;
    http.host;
    content:!"download.windowsupdate.com";
    content:!"download.adobe.com";
    pcre:"/^(?:\d{1,3}\.){3}\d{1,3}(?:\x3a\d{1,5})?$/";
    classtype:misc-activity;
    sid:2022858; rev:6;
    metadata:created_at 2016_06_03, confidence Medium, signature_severity Informational, updated_at 2020_09_02;
)

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