ET MALWARE Win32/Goofy Guineapig CnC Activity (GET) M1

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET / HTTP/1.1"; bsize:15;
http.header_names;
content:"Accept|0d 0a|Host|0d 0a|Authorization|0d 0a|User-Agent|0d 0a|Cache-Control|0d 0a 0d 0a|"; fast_pattern;
http.header;
content:!"Authorization|3a 20|Basic";
content:!"Authorization|3a 20|Digest";
pcre:"/Authorization\x3a\x20[a-zA-Z0-9\x2f\+=]{90,120}\x0d\x0a/";
Raw source ET MALWARE Win32/Goofy Guineapig CnC Activity (GET) M1 · 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 Win32/Goofy Guineapig CnC Activity (GET) M1";
    flow:established,to_server;
    http.request_line;
    content:"GET / HTTP/1.1"; bsize:15;
    http.header_names;
    content:"Accept|0d 0a|Host|0d 0a|Authorization|0d 0a|User-Agent|0d 0a|Cache-Control|0d 0a 0d 0a|"; fast_pattern;
    http.header;
    content:!"Authorization|3a 20|Basic";
    content:!"Authorization|3a 20|Digest";
    pcre:"/Authorization\x3a\x20[a-zA-Z0-9\x2f\+=]{90,120}\x0d\x0a/";
    reference:md5,a21dec89611368313e138480b3c94835;
    classtype:command-and-control;
    sid:2042947; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_15, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Goofy, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_15, reviewed_at 2025_10_24;
)

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