ET MALWARE SpyAgent C&C Activity (Response)

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"|21|lexec|3b|http"; startswith; fast_pattern;
content:"|2e|exe"; endswith;
Raw source ET MALWARE SpyAgent C&C Activity (Response) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE SpyAgent C&C Activity (Response)";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"|21|lexec|3b|http"; startswith; fast_pattern;
    content:"|2e|exe"; endswith;
    reference:md5,fbfd9afac42ae8e86193a8e4be085eaf;
    reference:url,trendmicro.com/en_us/research/21/k/campaign-abusing-rats-uses-fake-websites.html;
    classtype:command-and-control;
    sid:2034574; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_01, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_03;
)

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