alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ISRStealer Checkin"; flow:to_server,established; http.uri; content:"?action="; content:"&username="; content:"&password="; content:"&app="; content:"&pcname="; fast_pattern; content:"&sitename="; reference:md5,44be7c6d4109ae5fb0ceb2824facf2dd; reference:url,cert.pl/news/8706/langswitch_lang/en; classtype:command-and-control; sid:2016941; rev:8; metadata:created_at 2011_07_06, signature_severity Major, updated_at 2020_09_29;)