ET MALWARE PowerShell/Agent.A DNS Checkin

Query · suricata

content:"|01|"; offset:2; depth:1;
content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
content:"00"; distance:1; within:2;
content:"00000"; distance:0; fast_pattern;
pcre:"/^(?!0+30)[0-9A-Z]+30[^0-9]/R";
content:"|00|"; distance:0;
Raw source ET MALWARE PowerShell/Agent.A DNS Checkin · 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 udp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE PowerShell/Agent.A DNS Checkin";
    content:"|01|"; offset:2; depth:1;
    content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
    content:"00"; distance:1; within:2;
    content:"00000"; distance:0; fast_pattern;
    pcre:"/^(?!0+30)[0-9A-Z]+30[^0-9]/R";
    content:"|00|"; distance:0;
    reference:url,www.fireeye.com/blog/threat-research/2016/05/targeted_attacksaga.html;
    classtype:command-and-control;
    sid:2022836; rev:4;
    metadata:created_at 2016_05_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_29;
)

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