ET EXPLOIT Possible Zerologon NetrServerAuthenticate with 0x00 Client Credentials (CVE-2020-1472)

Query · suricata

flow:established,to_server;
content:"|00|"; offset:2;
content:"|1a 00|"; distance:19; within:2;
content:"|5c 00 5c 00|"; within:50;
content:"|24 00 00 00 06 00|"; distance:0; fast_pattern;
content:"|00 00 00 00 00 00 00 00|"; distance:0;
isdataat:!5,relative;
threshold:type limit, count 5, seconds 30, track by_src;
Raw source ET EXPLOIT Possible Zerologon NetrServerAuthenticate with 0x00 Client Credentials (CVE-2020-1472) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp-pkt any any -> [$HTTP_SERVERS,$HOME_NET] ![139,445] (
    msg:"ET EXPLOIT Possible Zerologon NetrServerAuthenticate with 0x00 Client Credentials (CVE-2020-1472)";
    flow:established,to_server;
    content:"|00|"; offset:2;
    content:"|1a 00|"; distance:19; within:2;
    content:"|5c 00 5c 00|"; within:50;
    content:"|24 00 00 00 06 00|"; distance:0; fast_pattern;
    content:"|00 00 00 00 00 00 00 00|"; distance:0;
    isdataat:!5,relative;
    threshold:type limit, count 5, seconds 30, track by_src;
    reference:url,www.secura.com/blog/zero-logon;
    reference:cve,2020-1472;
    classtype:attempted-admin;
    sid:2030871; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Server, created_at 2020_09_14, cve CVE_2020_1472, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_18;
)

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