alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE JST Perl IrcBot download"; flow:to_client,established; file_data; content:"JST Perl IrcBot"; fast_pattern; content:!"<html"; reference:url,pastebin.com/HK8riv9Q; reference:url,www.binarydefense.com/bds/active-shellshock-smtp-botnet-campaign/; reference:md5,77a6c50a06b59df0f3d099b1819a01d9; classtype:trojan-activity; sid:2019509; rev:3; metadata:created_at 2014_10_27, signature_severity Major, updated_at 2019_10_08;)