ET INFO Possible .jpg download by VBA macro (SET) M1

Query · suricata

flow:established,to_server;
flowbits:set,ET.vba-jpg-dl;
flowbits:noalert;
http.method;
content:"GET";
http.uri;
content:".jpg";
pcre:"/\.jpg(?:\?\d+)?$/";
http.header;
content:"Accept|3a 20|*/*|0d 0a|Accept-Encoding|3a 20|gzip, deflate|0d 0a|User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT"; depth:102; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept-Language|0d 0a|";

Rule dependencies

Feeds into

  • Nothing indexed reads ET.vba-jpg-dl.
Raw source ET INFO Possible .jpg download by VBA macro (SET) M1 · 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 -> $EXTERNAL_NET any (
    msg:"ET INFO Possible .jpg download by VBA macro (SET) M1";
    flow:established,to_server;
    flowbits:set,ET.vba-jpg-dl;
    flowbits:noalert;
    http.method;
    content:"GET";
    http.uri;
    content:".jpg";
    pcre:"/\.jpg(?:\?\d+)?$/";
    http.header;
    content:"Accept|3a 20|*/*|0d 0a|Accept-Encoding|3a 20|gzip, deflate|0d 0a|User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT"; depth:102; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept-Language|0d 0a|";
    classtype:not-suspicious;
    sid:2022220; rev:4;
    metadata:created_at 2015_12_05, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_20;
)

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