ET POLICY Outbound MSSQL Connection to Non-Standard Port - Likely Malware

Query · suricata

flow:to_server,established;
content:"|12 01 00|"; depth:3;
content:"|00 00 00 00 00 00 15 00 06 01 00 1b 00 01 02 00 1c 00|"; distance:1; within:18;
content:"|03 00|"; distance:1; within:2;
content:"|00 04 ff 08 00 01 55 00 00 00|"; distance:1; within:10;
flowbits:set,ET.MSSQL;

Rule dependencies

Feeds into

Raw source ET POLICY Outbound MSSQL Connection to Non-Standard Port - Likely Malware · 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 any -> $EXTERNAL_NET !1433 (
    msg:"ET POLICY Outbound MSSQL Connection to Non-Standard Port - Likely Malware";
    flow:to_server,established;
    content:"|12 01 00|"; depth:3;
    content:"|00 00 00 00 00 00 15 00 06 01 00 1b 00 01 02 00 1c 00|"; distance:1; within:18;
    content:"|03 00|"; distance:1; within:2;
    content:"|00 04 ff 08 00 01 55 00 00 00|"; distance:1; within:10;
    flowbits:set,ET.MSSQL;
    classtype:bad-unknown;
    sid:2013409; rev:3;
    metadata:created_at 2011_08_16, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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