nmap suricate 检测规则

# OPNsense's Suricata IDS/IPS Detection Rules Against NMAP Scans
# v. 2.1 / May 26th 2024 by Aleksi Bovellan
# https://github.com/aleksibovellan/opnsense-suricata-nmaps

# For NMAP scan detection between scan speeds of T1-T5

# SYN SCAN -sS (speeds T1-T5)

alert tcp any any -> any [21,22,23,25,53,80,88,110,135,137,138,139,143,161,389,443,445,465,514,587,636,853,993,995,1194,1433,1720,3306,3389,8080,8443,11211,27017,51820] (msg:"POSSBL PORT SCAN (NMAP -sS)"; flow:to_server,stateless; flags:S; window:1024; tcp.mss:1460; threshold:type threshold, track by_src, count 20, seconds 70; classtype:attempted-recon; sid:3400001; priority:2; rev:1;)

alert tcp any any -> any ![21,22,23,25,53,80,88,110,135,137,138,139,143,161,389,443,445,465,514,587,636,853,993,995,1194,1433,1720,3306,3389,8080,8443,11211,27017,51820] (msg:"POSSBL PORT SCAN (NMAP -sS)"; flow:to_server,stateless; flags:S; window:1024; tcp.mss:1460; threshold:type threshold, track by_src, count 7, seconds 135; classtype:attempted-recon; sid:3400002; priority:2; rev:2;)

# SYN-ACK 3-WAY SCAN -sT (speeds T2-T5)

alert tcp any ![22,25,53,80,88,143,443,445,465,587,853,993,1194,8080,51820] -> any ![22,25,53,80,88,143,443,445,465,587,853,993,1194,8080,51820] (msg:"POSSBL PORT SCAN (NMAP -sT)"; flow:to_server; window:32120; flags:S; threshold:type threshold, track by_src, count 20, seconds 70; classtype:attempted-recon; sid:3400003; rev:3;)

# ACK SCAN -sA (speeds T2-T5)

alert tcp any ![22,25,53,80,88,143,443,445,465,587,853,993,1194,8080,51820] -> any ![22,25,53,80,88,143,443,445,465,587,853,993,1194,8080,51820] (msg:"POSSBL PORT SCAN (NMAP -sA)"; flags:A; flow:stateless; window:1024; threshold:type threshold, track by_dst, count 20, seconds 70; classtype:attempted-recon; sid:3400004; priority:2; rev:5;)

# CHRISTMAS TREE SCAN -sX (speeds T1-T5)

alert tcp any any -> any any (msg:"POSSBL PORT SCAN (NMAP -sX)"; flags:FPU; flow:to_server,stateless; threshold:type threshold, track by_src, count 3, seconds 120; classtype:attempted-recon; sid:3400005; rev:2;)

# FRAGMENTED SCAN -f (speeds T1-T5)

alert ip any any -> any any (msg:"POSSBL SCAN FRAG (NMAP -f)"; fragbits:M+D; threshold:type limit, track by_src, count 3, seconds 1210; classtype:attempted-recon; sid:3400006; priority:2; rev:6;)

# UDP SCAN -sU (speeds T1-T5)

alert udp any any -> any [53,67,68,69,123,161,162,389,520,1026,1027,1028,1029,1194,1434,1900,11211,12345,27017,51820] (msg:"POSSBL PORT SCAN (NMAP -sU)"; flow:to_server,stateless; classtype:attempted-recon; sid:3400007; priority:2; rev:6; threshold:type threshold, track by_src, count 20, seconds 70; dsize:0;)

alert udp any any -> any ![53,67,68,69,123,161,162,389,520,1026,1027,1028,1029,1194,1434,1900,11211,12345,27017,51820] (msg:"POSSBL PORT SCAN (NMAP -sU)"; flow:to_server,stateless; classtype:attempted-recon; sid:3400008; priority:2; rev:6; threshold:type threshold, track by_src, count 7, seconds 135; dsize:0;)

# For all usages of destination port 4444:

# TCP destination port: 4444
alert tcp any ![21,22,23,25,53,80,88,110,135,137,138,139,143,161,389,443,445,465,514,587,636,853,993,995,1194,1433,1720,3306,3389,8080,8443,11211,27017,51820] -> any 4444 (msg:"POSSBL SCAN SHELL M-SPLOIT TCP"; classtype:trojan-activity; sid:3400020; priority:1; rev:2;)

# UDP destination port: 4444
alert udp any ![53,67,68,69,123,161,162,389,520,1026,1027,1028,1029,1194,1434,1900,11211,12345,27017,51820] -> any 4444 (msg:"POSSBL SCAN SHELL M-SPLOIT UDP"; classtype:trojan-activity; sid:3400021; priority:1; rev:2;)

https://github.com/aleksibovellan/opnsense-suricata-nmaps/blob/main/local.rules