alert smb any any -> $HOME_NET any (msg:"ET EXPLOIT Possible ETERNALROMANCE MS17-010 Heap Spray"; flow:to_server,established; content:"|ff|SMB|25 00 00 00 00 18|"; offset:4; depth:10; content:"|07 c0 00 00 00 00 00 00 00 00 00 00 00 00 00 08|"; fast_pattern; within:16; content:"|00 08|"; distance:2; within:2; content:"|0e 00 00 40 00|"; distance:2; within:5; content:"|00 00 00 00 00 00 01 00 00 00 00 00 00 00 00|"; distance:2; within:15; content:"|00 00 00 00 00 00 00 00 00|"; endswith; threshold:type threshold, track by_src, count 20, seconds 1; classtype:trojan-activity; sid:2024219; rev:2; metadata:attack_target SMB_Server, created_at 2017_04_17, deployment Internal, confidence Medium, signature_severity Critical, updated_at 2019_09_28;)