ET MALWARE Possible Kimsuky APT Connectivity Check via Document

Query · suricata

flow:established,to_server;
http.header;
content:".mireene.com|0d 0a|Content-Length|3a 20|0|0d 0a|"; fast_pattern;
http.user_agent;
content:"Microsoft Office Protocol Discovery";
Raw source ET MALWARE Possible Kimsuky APT Connectivity Check via Document · 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 Kimsuky APT Connectivity Check via Document";
    flow:established,to_server;
    http.header;
    content:".mireene.com|0d 0a|Content-Length|3a 20|0|0d 0a|"; fast_pattern;
    http.user_agent;
    content:"Microsoft Office Protocol Discovery";
    classtype:targeted-activity;
    sid:2029851; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_09, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_09;
)

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