alert smb any any -> $HOME_NET any (msg:"ET EXPLOIT Possible ETERNALBLUE MS17-010 Heap Spray"; flow:to_server,established; content:"|ff|SMB|33 00 00 00 00 18 07 c0 00 00 00 00 00 00 00 00 00 00 00 00 00 08 ff fe 00 08|"; offset:4; depth:30; fast_pattern; content:"|00 09 00 00 00 10|"; distance:1; within:6; content:"|00 00 00 00 00 00 00 10|"; within:8; content:"|00 00 00 10|"; distance:4; within:4; pcre:"/^[a-zA-Z0-9+/]{1000,}/R"; threshold:type both, track by_src, count 3, seconds 30; classtype:trojan-activity; sid:2024217; rev:4; metadata:attack_target SMB_Server, created_at 2017_04_17, deployment Internal, confidence Medium, signature_severity Critical, updated_at 2022_03_17;)