ET MALWARE Possible APT28 Maldoc CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/software-protection/app.php"; startswith; fast_pattern; endswith;
http.connection;
content:"Keep-Alive";
http.header_names;
content:!"Referer";
content:!"Accept";
content:!"Cache";
Raw source ET MALWARE Possible APT28 Maldoc CnC Checkin · 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 Possible APT28 Maldoc CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/software-protection/app.php"; startswith; fast_pattern; endswith;
    http.connection;
    content:"Keep-Alive";
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    content:!"Cache";
    reference:url,blog.telsy.com/zebrocy-dropbox-remote-injection/;
    classtype:targeted-activity;
    sid:2027939; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_09_02, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag APT28, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;
)

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