alert tcp any any -> any any (msg:"ET SHELLCODE Plain1 Shellcode"; flow:established; content:"|89 e1 cd|"; content:"|5b 5d 52 66 bd|"; distance:0; content:"|0f cd 09 dd 55 6a|"; distance:0; content:"|51 50|"; distance:0; classtype:shellcode-detect; sid:2009263; rev:3; metadata:created_at 2010_07_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)