ET MALWARE SUNSHUTTLE CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php"; endswith;
http.cookie;
content:"HjELmFxKJc="; fast_pattern;
content:"P5hCrabkKf=";
content:"iN678zYrXMJZ=";
Raw source ET MALWARE SUNSHUTTLE CnC Activity · Suricata
Esc
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 SUNSHUTTLE CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php"; endswith;
    http.cookie;
    content:"HjELmFxKJc="; fast_pattern;
    content:"P5hCrabkKf=";
    content:"iN678zYrXMJZ=";
    reference:url,www.fireeye.com/blog/threat-research/2021/03/sunshuttle-second-stage-backdoor-targeting-us-based-entity.html;
    classtype:command-and-control;
    sid:2031811; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_03_04, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_04;
)

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