File: scan.rules

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# (C) Copyright 2001-2004, Martin Roesch, Brian Caswell, et al.
#    All rights reserved.
# $Id: scan.rules,v 1.29.2.2 2005/02/10 01:11:14 bmc Exp $
#-----------
# SCAN RULES
#-----------
# These signatures are representitive of network scanners.  These include
# port scanning, ip mapping, and various application scanners.
#
# NOTE: This does NOT include web scanners such as whisker.  Those are
# in web*
#

alert tcp $EXTERNAL_NET 10101 -> $HOME_NET any (msg:"SCAN myscan"; flow:stateless; ack:0; flags:S; ttl:>220; reference:arachnids,439; classtype:attempted-recon; sid:613; rev:6;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 113 (msg:"SCAN ident version request"; flow:to_server,established; content:"VERSION|0A|"; depth:16; reference:arachnids,303; classtype:attempted-recon; sid:616; rev:4;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 80 (msg:"SCAN cybercop os probe"; flow:stateless; dsize:0; flags:SF12; reference:arachnids,146; classtype:attempted-recon; sid:619; rev:6;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN FIN"; flow:stateless; flags:F,12; reference:arachnids,27; classtype:attempted-recon; sid:621; rev:7;)
# alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN ipEye SYN scan"; flow:stateless; flags:S; seq:1958810375; reference:arachnids,236; classtype:attempted-recon; sid:622; rev:8;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN NULL"; flow:stateless; ack:0; flags:0; seq:0; reference:arachnids,4; classtype:attempted-recon; sid:623; rev:6;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN SYN FIN"; flow:stateless; flags:SF,12; reference:arachnids,198; classtype:attempted-recon; sid:624; rev:7;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN XMAS"; flow:stateless; flags:SRAFPU,12; reference:arachnids,144; classtype:attempted-recon; sid:625; rev:7;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN nmap XMAS"; flow:stateless; flags:FPU,12; reference:arachnids,30; classtype:attempted-recon; sid:1228; rev:7;)
# alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN synscan portscan"; flow:stateless; flags:SF; id:39426; reference:arachnids,441; classtype:attempted-recon; sid:630; rev:7;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN cybercop os PA12 attempt"; flow:stateless; flags:PA12; content:"AAAAAAAAAAAAAAAA"; depth:16; reference:arachnids,149; classtype:attempted-recon; sid:626; rev:8;)
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN cybercop os SFU12 probe"; flow:stateless; ack:0; flags:SFU12; content:"AAAAAAAAAAAAAAAA"; depth:16; reference:arachnids,150; classtype:attempted-recon; sid:627; rev:8;)
alert udp $EXTERNAL_NET any -> $HOME_NET 10080:10081 (msg:"SCAN Amanda client version request"; content:"Amanda"; nocase; classtype:attempted-recon; sid:634; rev:2;)
alert udp $EXTERNAL_NET any -> $HOME_NET 49 (msg:"SCAN XTACACS logout"; content:"|80 07 00 00 07 00 00 04 00 00 00 00 00|"; reference:arachnids,408; classtype:bad-unknown; sid:635; rev:3;)
alert udp $EXTERNAL_NET any -> $HOME_NET 7 (msg:"SCAN cybercop udp bomb"; content:"cybercop"; reference:arachnids,363; classtype:bad-unknown; sid:636; rev:1;)
alert udp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN Webtrends Scanner UDP Probe"; content:"|0A|help|0A|quite|0A|"; reference:arachnids,308; classtype:attempted-recon; sid:637; rev:3;)
alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"SCAN SSH Version map attempt"; flow:to_server,established; content:"Version_Mapper"; nocase; classtype:network-scan; sid:1638; rev:5;)
alert udp $EXTERNAL_NET any -> $HOME_NET 1900 (msg:"SCAN UPnP service discover attempt"; content:"M-SEARCH "; depth:9; content:"ssdp|3A|discover"; classtype:network-scan; sid:1917; rev:6;)
alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"SCAN SolarWinds IP scan attempt"; icode:0; itype:8; content:"SolarWinds.Net"; classtype:network-scan; sid:1918; rev:6;)
alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"SCAN cybercop os probe"; flow:stateless; ack:0; flags:SFP; content:"AAAAAAAAAAAAAAAA"; depth:16; reference:arachnids,145; classtype:attempted-recon; sid:1133; rev:12;)