ET MALWARE Potao CnC POST Response

Query · suricata

flow:to_client,established;
http.server;
content:"nginx"; startswith;
file.data;
content:"<?xml version=|27|1.0|27|?>"; depth:21;
content:"<methodResponse>"; distance:1;
content:"<params>|0a|<param>"; distance:1;
content:"<value><base64>"; fast_pattern; distance:1;
pcre:"/^\x0a(?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9/+]{2}==|[A-Za-z0-9/+]{3}=|[A-Za-z0-9/+]{4})\x0a/R";
Raw source ET MALWARE Potao CnC POST Response · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Potao CnC POST Response";
    flow:to_client,established;
    http.server;
    content:"nginx"; startswith;
    file.data;
    content:"<?xml version=|27|1.0|27|?>"; depth:21;
    content:"<methodResponse>"; distance:1;
    content:"<params>|0a|<param>"; distance:1;
    content:"<value><base64>"; fast_pattern; distance:1;
    pcre:"/^\x0a(?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9/+]{2}==|[A-Za-z0-9/+]{3}=|[A-Za-z0-9/+]{4})\x0a/R";
    classtype:command-and-control;
    sid:2021555; rev:3;
    metadata:created_at 2015_07_31, signature_severity Major, updated_at 2020_05_29;
)

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.