alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET MALWARE Downloader.Win32.Tesch.A Bot Command Checkin 1"; flow:established,to_server; dsize:51; content:"|03 00 30 01 01 00|"; fast_pattern; depth:6; flowbits:set,ET.Tesch; reference:md5,86b5491831522f3c7bdcdacb17417514; reference:md5,2bebb36872b4829f553326e102d014ed; classtype:command-and-control; sid:2018478; rev:3; metadata:created_at 2014_05_15, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_19;)