alert smb $HOME_NET any -> any any (msg:"ET EXPLOIT Possible ETERNALBLUE MS17-010 Echo Response"; flow:from_server,established; content:"|00 00 00 31 ff|SMB|2b 00 00 00 00 98 07 c0|"; depth:16; fast_pattern; content:"|4a 6c 4a 6d 49 68 43 6c 42 73 72 00|"; distance:0; flowbits:isset,ET.ETERNALBLUE; classtype:trojan-activity; sid:2024218; rev:2; metadata:attack_target SMB_Server, created_at 2017_04_17, deployment Internal, confidence Medium, signature_severity Critical, updated_at 2019_07_26;)