ET MALWARE Win32/Coreshell Checkin (APT28 Related)

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.uri;
content:"/~xh/sn.cgi?"; fast_pattern;
pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+?$/R";
Raw source ET MALWARE Win32/Coreshell Checkin (APT28 Related) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Coreshell Checkin (APT28 Related)";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:"/~xh/sn.cgi?"; fast_pattern;
    pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+?$/R";
    reference:url,www.fireeye.com/resources/pdfs/apt28.pdf;
    reference:md5,272f0fde35dbdfccbca1e33373b3570d;
    classtype:targeted-activity;
    sid:2019539; rev:5;
    metadata:created_at 2014_10_28, malware_family Win32_Coreshell, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_13;
)

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.