ET POLICY Unserialized Java Payload via RMI Response

Query · suricata

flow:established,to_client;
stream_size:client,<,100;
flowbits:isset,ET.RMIRequest;
content:"|51 ca fe ba be|"; startswith;

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 POLICY Unserialized Java Payload via RMI Response · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET POLICY Unserialized Java Payload via RMI Response";
    flow:established,to_client;
    stream_size:client,<,100;
    flowbits:isset,ET.RMIRequest;
    content:"|51 ca fe ba be|"; startswith;
    reference:url,blogs.juniper.net/en-us/threat-research/log4j-vulnerability-attackers-shift-focus-from-ldap-to-rmi;
    classtype:bad-unknown;
    sid:2034749; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_12_17, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_17;
)

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