alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Pykspa.C Public IP Check"; flow:established,to_server; urilen:1; http.user_agent; content:"Mozilla/5.0 (Windows|3b 20|U|3b 20|Windows NT 5.1|3b 20|en-US|3b 20|rv|3a|1.9.1.3) Gecko/20090824 Firefox/3.5.3"; fast_pattern; http.host; content:"myip"; http.header_names; to_lowercase; content:!"|0d 0a|accept-"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,b94e213153a1929db2f414f23d891d76; reference:md5,324ff262da1233ef874ff29213cf8f19; classtype:trojan-activity; sid:2018773; rev:6; metadata:created_at 2014_07_24, malware_family Win32_Pykspa_C, signature_severity Major, updated_at 2024_04_20;)