alert tcp $HOME_NET any -> $EXTERNAL_NET 9000:10000 (msg:"ET MALWARE Win32/Recslurp.D C2 Request (no alert)"; flow:established,to_server; dsize:4; content:"|e8 03 00 00|"; fast_pattern; flowbits:set,ET.Reslurp.D.Client; flowbits:noalert; reference:md5,fcf364abd9c82d89f8d0b4b091276b41; classtype:command-and-control; sid:2020154; rev:3; metadata:created_at 2015_01_08, malware_family Win32_Recslurp_D, signature_severity Major, updated_at 2019_10_08;)