alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HTTP_SERVERS any (msg:"ET WEB_SERVER Image Content-Type with Obfuscated PHP (Seen with C99 Shell)"; flow:from_server,established; content:"Content-Type|3a| image/"; http_header; file_data; content:"eval(gzinflate(base64_decode("; distance:0; fast_pattern; reference:url,malwaremustdie.blogspot.jp/2012/10/how-far-phpc99shell-malware-can-go-from.html; classtype:attempted-user; sid:2015755; rev:2;)

Added 2012-10-02 22:49:23 UTC

alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HTTP_SERVERS any (msg:"ET CURRENT_EVENTS Image Content-Type with Obfuscated PHP (Seen with C99 Shell)"; flow:from_server,established; content:"Content-Type|3a| image/"; http_header; file_data; content:"eval(gzinflate(base64_decode("; distance:0; fast_pattern; reference:url,malwaremustdie.blogspot.jp/2012/10/how-far-phpc99shell-malware-can-go-from.html; classtype:attempted-user; sid:2015755; rev:1;)

Added 2012-10-01 21:48:07 UTC