Initial Access (TA0001)(external, opens in a new tab or window)
corelight(external, opens in a new tab or window)
network_traffic(external, opens in a new tab or window)
panw(external, opens in a new tab or window)
fortinet_fortigate(external, opens in a new tab or window)
text code block:(data_stream.dataset:(fortinet_fortigate.log or network_traffic.flow or pfsense.log or zeek.smb_cmd or zeek.smb_files or zeek.smb_mapping) or event.category:(network or network_traffic)) and network.transport:tcp and destination.port:(139 or 445) and destination.ip:(10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16) and not source.ip:( 10.0.0.0/8 or 100.64.0.0/10 or 127.0.0.0/8 or 169.254.0.0/16 or 172.16.0.0/12 or 192.0.0.0/24 or 192.0.0.0/29 or 192.0.0.10/32 or 192.0.0.170/32 or 192.0.0.171/32 or 192.0.0.8/32 or 192.0.0.9/32 or 192.0.2.0/24 or 192.168.0.0/16 or 192.175.48.0/24 or 192.31.196.0/24 or 192.52.193.0/24 or 192.88.99.0/24 or 198.18.0.0/15 or 198.51.100.0/24 or 203.0.113.0/24 or 224.0.0.0/4 or 240.0.0.0/4 or "::1" or "FE80::/10" or "FF00::/8" ) and not ( data_stream.dataset:panw.panos and network.application:("incomplete" or "insufficient-data" or "not-applicable") )
Install detection rules in Elastic Security
Detect SMB (Windows File Sharing) Activity from the Internet in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).