ET POLICY Serialized Java Object returned via LDAPv3 Response

Query · suricata

flow:established,to_client;
content:"|30|"; depth:1;
content:"|04 0d|javaClassName"; fast_pattern;
content:"|04 12|javaSerializedData"; distance:0;
content:"|ac ed|"; within:10;
Raw source ET POLICY Serialized Java Object returned via LDAPv3 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 any any -> $HOME_NET any (
    msg:"ET POLICY Serialized Java Object returned via LDAPv3 Response";
    flow:established,to_client;
    content:"|30|"; depth:1;
    content:"|04 0d|javaClassName"; fast_pattern;
    content:"|04 12|javaSerializedData"; distance:0;
    content:"|ac ed|"; within:10;
    reference:url,ldap.com/ldapv3-wire-protocol-reference-ldap-result/;
    reference:url,ldap.com/ldapv3-wire-protocol-reference-search/;
    reference:cve,2021-44228;
    classtype:bad-unknown;
    sid:2034818; rev:2;
    metadata:attack_target Client_and_Server, created_at 2021_12_21, cve CVE_2021_44228, deployment Perimeter, deployment Internal, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_21;
)

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