alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Bamital Checkin Response 1"; flow:established,from_server; file_data; content:"$$$$"; within:4; fast_pattern; pcre:"/^<(?P<var1>[a-z])>[a-z0-9/]+<\/(?P=var1)><(?P<var2>[a-z])>[a-z0-9/]+<\/(?P=var2)>/Ri"; classtype:command-and-control; sid:2019757; rev:2; metadata:created_at 2014_11_20, signature_severity Major, updated_at 2019_07_26;)