Rule History

alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Possible TCP x86 JMP to CALL Shellcode Detected"; flow:established; content:"|EB|"; byte_jump:1,0,relative; content:"|E8|"; within:1; content:"|FF FF FF|"; distance:1; within:3; content:!"MZ"; content:!"This program cannot be run in DOS mode"; content:!"Windows Program"; reference:url,www.networkforensics.com/2010/05/16/network-detection-of-x86-buffer-overflow-shellcode/; classtype:shellcode-detect; sid:2011803; rev:7; metadata:created_at 2010_10_13, confidence Medium, signature_severity Major, updated_at 2025_05_05;)