ET MALWARE Win32/WhiskerSpy CnC Activity

Query · suricata

flow:established,to_server;
http.content_type;
content:"multipart|2f|form|2d|data|3b 20|boundary|3d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d|81fd830c85363675"; bsize:60;
threshold:type limit, count 1, seconds 300, track by_src;
Raw source ET MALWARE Win32/WhiskerSpy CnC Activity · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/WhiskerSpy CnC Activity";
    flow:established,to_server;
    http.content_type;
    content:"multipart|2f|form|2d|data|3b 20|boundary|3d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d|81fd830c85363675"; bsize:60;
    threshold:type limit, count 1, seconds 300, track by_src;
    reference:md5,8fb3695d1487b55aaf380190a0524098;
    reference:url,trendmicro.com/en_us/research/23/b/earth-kitsune-delivers-new-whiskerspy-backdoor.html;
    classtype:command-and-control;
    sid:2044253; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_20, deployment Perimeter, deployment SSLDecrypt, malware_family WhiskerSpy, performance_impact Low, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_20;
)

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