ET HUNTING JAR Sent Claiming To Be Image - Likely Exploit Kit

Query · suricata

flow:established,to_client;
flowbits:isset,ET.http.javaclient;
http.content_type;
content:"image/"; startswith;
file.data;
content:"PK"; within:2;
content:".class"; fast_pattern; distance:10; within:500;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET HUNTING JAR Sent Claiming To Be Image - Likely Exploit Kit · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING JAR Sent Claiming To Be Image - Likely Exploit Kit";
    flow:established,to_client;
    flowbits:isset,ET.http.javaclient;
    http.content_type;
    content:"image/"; startswith;
    file.data;
    content:"PK"; within:2;
    content:".class"; fast_pattern; distance:10; within:500;
    classtype:bad-unknown;
    sid:2018233; rev:4;
    metadata:created_at 2014_03_08, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_24;
)

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