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;)