ET EXPLOIT Zerologon Phase 3/3 - NetrLogonSamLogonWithFlags Request with 0x00 Client Credentials (CVE-2020-1472)

Query · suricata

flow:established,to_server;
flowbits:isset,dcerpc.rpcnetlogon;
flowbits:isset,dcerpc.rpcnetlogon.netrsrvrauth.nosignnoseal;
content:"|05 00 00|"; startswith; fast_pattern;
content:"|2d 00|"; offset:22; depth:2;
content:"|00 00 00 00 00 00 00 00 00 00 00 00|"; distance:0;
content:!"|00 00 00 00|"; within:4;
content:"|00 00 00 00 00 00 00 00 00 00 00 00|"; distance:4; within:12;

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 EXPLOIT Zerologon Phase 3/3 - NetrLogonSamLogonWithFlags Request 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] 1024: (
    msg:"ET EXPLOIT Zerologon Phase 3/3 - NetrLogonSamLogonWithFlags Request with 0x00 Client Credentials (CVE-2020-1472)";
    flow:established,to_server;
    flowbits:isset,dcerpc.rpcnetlogon;
    flowbits:isset,dcerpc.rpcnetlogon.netrsrvrauth.nosignnoseal;
    content:"|05 00 00|"; startswith; fast_pattern;
    content:"|2d 00|"; offset:22; depth:2;
    content:"|00 00 00 00 00 00 00 00 00 00 00 00|"; distance:0;
    content:!"|00 00 00 00|"; within:4;
    content:"|00 00 00 00 00 00 00 00 00 00 00 00|"; distance:4; within:12;
    reference:url,www.secura.com/blog/zero-logon;
    reference:url,dirkjanm.io/a-different-way-of-abusing-zerologon/;
    reference:cve,2020-1472;
    reference:url,thedfirreport.com/2022/02/21/qbot-and-zerologon-lead-to-full-domain-compromise/;
    classtype:attempted-admin;
    sid:2035263; rev:2;
    metadata:attack_target Server, created_at 2022_02_22, cve CVE_2020_1472, deployment Internal, performance_impact Significant, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_22;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.