ET POLICY LDAPSv3 LDAPS_START_TLS Request Outbound

Query · suricata

flow:established,to_server;
flowbits:set,ET.LDAPSBindRequest;
flowbits:isnotset,ET.LDAPSBindRequest;
stream_size:server,<,5;
content:"|30 1d 02 01|"; startswith;
content:"|77 18 80 16 31 2e 33 2e 36 2e 31 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37|"; endswith; fast_pattern;

Rule dependencies

Excludes

  • ET.LDAPSBindRequest — excluded, not a dependency

Feeds into

  • 2 rules read ET.LDAPSBindRequest · view all
Raw source ET POLICY LDAPSv3 LDAPS_START_TLS Request Outbound · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp [$HOME_NET,$HTTP_SERVERS] any -> $EXTERNAL_NET any (
    msg:"ET POLICY LDAPSv3 LDAPS_START_TLS Request Outbound";
    flow:established,to_server;
    flowbits:set,ET.LDAPSBindRequest;
    flowbits:isnotset,ET.LDAPSBindRequest;
    stream_size:server,<,5;
    content:"|30 1d 02 01|"; startswith;
    content:"|77 18 80 16 31 2e 33 2e 36 2e 31 2e 34 2e 31 2e 31 34 36 36 2e 32 30 30 33 37|"; endswith; fast_pattern;
    reference:url,ldap.com/ldapv3-wire-protocol-reference-extended/;
    classtype:bad-unknown;
    sid:2034719; rev:2;
    metadata:attack_target Client_and_Server, created_at 2021_12_14, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_15;
)

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