ET MALWARE PlugX/Korplug CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/script"; bsize:7;
http.request_body;
content:"v="; startswith; fast_pattern;
content:"&id="; distance:0;
content:"&uid="; distance:0;
content:"&vs="; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE PlugX/Korplug CnC Activity · 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 http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE PlugX/Korplug CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/script"; bsize:7;
    http.request_body;
    content:"v="; startswith; fast_pattern;
    content:"&id="; distance:0;
    content:"&uid="; distance:0;
    content:"&vs="; distance:0;
    http.header_names;
    content:!"Referer";
    reference:url,www.welivesecurity.com/2021/03/10/exchange-servers-under-siege-10-apt-groups/;
    reference:md5,26e442aa18fcea38e4c652d346627238;
    classtype:command-and-control;
    sid:2032001; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_03_12, deployment Perimeter, malware_family PlugX, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_12;
)

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