ET MALWARE Suspected Fancy Bear (APT28) Maldoc CnC

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"Windows|20|NT|20|6.1|3b 20|WOW64|3b|"; bsize:22;
http.request_body;
content:"IB="; startswith; fast_pattern;
content:"&log="; distance:0;
Raw source ET MALWARE Suspected Fancy Bear (APT28) Maldoc CnC · 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 Suspected Fancy Bear (APT28) Maldoc CnC";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"Windows|20|NT|20|6.1|3b 20|WOW64|3b|"; bsize:22;
    http.request_body;
    content:"IB="; startswith; fast_pattern;
    content:"&log="; distance:0;
    reference:url,twitter.com/RedDrip7/status/1362343352759250946?s=20;
    reference:md5,c9a43fd6623bf0bc287012b6ee10a98e;
    reference:md5,49696043b51acca6ced2ab213bd4abef;
    classtype:command-and-control;
    sid:2031628; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_02_18, deployment Perimeter, malware_family APT28, malware_family Fancy_Bear, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_18;
)

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