File: shellcode.rules

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# Copyright 2001-2005 Sourcefire, Inc. All Rights Reserved
#
# This file may contain proprietary rules that were created, tested and
# certified by Sourcefire, Inc. (the "VRT Certified Rules") as well as
# rules that were created by Sourcefire and other third parties and
# distributed under the GNU General Public License (the "GPL Rules").  The
# VRT Certified Rules contained in this file are the property of
# Sourcefire, Inc. Copyright 2005 Sourcefire, Inc. All Rights Reserved.
# The GPL Rules created by Sourcefire, Inc. are the property of
# Sourcefire, Inc. Copyright 2002-2005 Sourcefire, Inc. All Rights
# Reserved.  All other GPL Rules are owned and copyrighted by their
# respective owners (please see www.snort.org/contributors for a list of
# owners and their respective copyrights).  In order to determine what
# rules are VRT Certified Rules or GPL Rules, please refer to the VRT
# Certified Rules License Agreement.
#
#
# $Id: shellcode.rules,v 1.25.2.1.2.1 2005/05/16 22:17:52 mwatchinski Exp $
# ---------------
# SHELLCODE RULES
# ---------------
# These signatures are based on shellcode that is common ammong multiple
# publicly available exploits.
#
# Because these signatures check ALL traffic for shellcode, these signatures
# are disabled by default.  There is a LARGE performance hit by enabling
# these signatures.
#

alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc setuid 0"; content:"|82 10| |17 91 D0| |08|"; reference:arachnids,282; classtype:system-call-detect; sid:647; rev:6;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 setgid 0"; content:"|B0 B5 CD 80|"; reference:arachnids,284; classtype:system-call-detect; sid:649; rev:8;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 setuid 0"; content:"|B0 17 CD 80|"; reference:arachnids,436; classtype:system-call-detect; sid:650; rev:8;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE SGI NOOP"; content:"|03 E0 F8|%|03 E0 F8|%|03 E0 F8|%|03 E0 F8|%"; reference:arachnids,356; classtype:shellcode-detect; sid:638; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE SGI NOOP"; content:"|24 0F 12|4|24 0F 12|4|24 0F 12|4|24 0F 12|4"; reference:arachnids,357; classtype:shellcode-detect; sid:639; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE AIX NOOP"; content:"O|FF FB 82|O|FF FB 82|O|FF FB 82|O|FF FB 82|"; classtype:shellcode-detect; sid:640; rev:6;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE Digital UNIX NOOP"; content:"G|FF 04 1F|G|FF 04 1F|G|FF 04 1F|G|FF 04 1F|"; reference:arachnids,352; classtype:shellcode-detect; sid:641; rev:6;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE HP-UX NOOP"; content:"|08|!|02 80 08|!|02 80 08|!|02 80 08|!|02 80|"; reference:arachnids,358; classtype:shellcode-detect; sid:642; rev:6;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE HP-UX NOOP"; content:"|0B|9|02 80 0B|9|02 80 0B|9|02 80 0B|9|02 80|"; reference:arachnids,359; classtype:shellcode-detect; sid:643; rev:7;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|13 C0 1C A6 13 C0 1C A6 13 C0 1C A6 13 C0 1C A6|"; reference:arachnids,345; classtype:shellcode-detect; sid:644; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|80 1C|@|11 80 1C|@|11 80 1C|@|11 80 1C|@|11|"; reference:arachnids,353; classtype:shellcode-detect; sid:645; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|A6 1C C0 13 A6 1C C0 13 A6 1C C0 13 A6 1C C0 13|"; reference:arachnids,355; classtype:shellcode-detect; sid:646; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 NOOP"; content:"|90 90 90 90 90 90 90 90 90 90 90 90 90 90|"; depth:128; reference:arachnids,181; classtype:shellcode-detect; sid:648; rev:7;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 stealth NOOP"; content:"|EB 02 EB 02 EB 02|"; reference:arachnids,291; classtype:shellcode-detect; sid:651; rev:8;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x90 unicode NOOP"; content:"|90 00 90 00 90 00 90 00 90 00|"; classtype:shellcode-detect; sid:653; rev:9;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE Linux shellcode"; content:"|90 90 90 E8 C0 FF FF FF|/bin/sh"; reference:arachnids,343; classtype:shellcode-detect; sid:652; rev:9;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 inc ebx NOOP"; content:"CCCCCCCCCCCCCCCCCCCCCCCC"; classtype:shellcode-detect; sid:1390; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 NOOP"; content:"aaaaaaaaaaaaaaaaaaaaa"; classtype:shellcode-detect; sid:1394; rev:5;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0xEB0C NOOP"; content:"|EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C|"; classtype:shellcode-detect; sid:1424; rev:6;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x71FB7BAB NOOP"; content:"q|FB|{|AB|q|FB|{|AB|q|FB|{|AB|q|FB|{|AB|"; classtype:shellcode-detect; sid:2312; rev:2;)
alert tcp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x71FB7BAB NOOP unicode"; content:"q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|"; classtype:shellcode-detect; sid:2313; rev:2;)

# Shellcodes in UDP ports
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc setuid 0"; content:"|82 10| |17 91 D0| |08|"; reference:arachnids,282; classtype:system-call-detect; sid:647; rev:6;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 setgid 0"; content:"|B0 B5 CD 80|"; reference:arachnids,284; classtype:system-call-detect; sid:649; rev:8;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 setuid 0"; content:"|B0 17 CD 80|"; reference:arachnids,436; classtype:system-call-detect; sid:650; rev:8;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE SGI NOOP"; content:"|03 E0 F8|%|03 E0 F8|%|03 E0 F8|%|03 E0 F8|%"; reference:arachnids,356; classtype:shellcode-detect; sid:638; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE SGI NOOP"; content:"|24 0F 12|4|24 0F 12|4|24 0F 12|4|24 0F 12|4"; reference:arachnids,357; classtype:shellcode-detect; sid:639; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE AIX NOOP"; content:"O|FF FB 82|O|FF FB 82|O|FF FB 82|O|FF FB 82|"; classtype:shellcode-detect; sid:640; rev:6;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE Digital UNIX NOOP"; content:"G|FF 04 1F|G|FF 04 1F|G|FF 04 1F|G|FF 04 1F|"; reference:arachnids,352; classtype:shellcode-detect; sid:641; rev:6;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE HP-UX NOOP"; content:"|08|!|02 80 08|!|02 80 08|!|02 80 08|!|02 80|"; reference:arachnids,358; classtype:shellcode-detect; sid:642; rev:6;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE HP-UX NOOP"; content:"|0B|9|02 80 0B|9|02 80 0B|9|02 80 0B|9|02 80|"; reference:arachnids,359; classtype:shellcode-detect; sid:643; rev:7;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|13 C0 1C A6 13 C0 1C A6 13 C0 1C A6 13 C0 1C A6|"; reference:arachnids,345; classtype:shellcode-detect; sid:644; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|80 1C|@|11 80 1C|@|11 80 1C|@|11 80 1C|@|11|"; reference:arachnids,353; classtype:shellcode-detect; sid:645; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE sparc NOOP"; content:"|A6 1C C0 13 A6 1C C0 13 A6 1C C0 13 A6 1C C0 13|"; reference:arachnids,355; classtype:shellcode-detect; sid:646; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 NOOP"; content:"|90 90 90 90 90 90 90 90 90 90 90 90 90 90|"; depth:128; reference:arachnids,181; classtype:shellcode-detect; sid:648; rev:7;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 stealth NOOP"; content:"|EB 02 EB 02 EB 02|"; reference:arachnids,291; classtype:shellcode-detect; sid:651; rev:8;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x90 unicode NOOP"; content:"|90 00 90 00 90 00 90 00 90 00|"; classtype:shellcode-detect; sid:653; rev:9;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE Linux shellcode"; content:"|90 90 90 E8 C0 FF FF FF|/bin/sh"; reference:arachnids,343; classtype:shellcode-detect; sid:652; rev:9;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 inc ebx NOOP"; content:"CCCCCCCCCCCCCCCCCCCCCCCC"; classtype:shellcode-detect; sid:1390; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 NOOP"; content:"aaaaaaaaaaaaaaaaaaaaa"; classtype:shellcode-detect; sid:1394; rev:5;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0xEB0C NOOP"; content:"|EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C EB 0C|"; classtype:shellcode-detect; sid:1424; rev:6;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x71FB7BAB NOOP"; content:"q|FB|{|AB|q|FB|{|AB|q|FB|{|AB|q|FB|{|AB|"; classtype:shellcode-detect; sid:2312; rev:2;)
alert udp $EXTERNAL_NET $SHELLCODE_PORTS -> $HOME_NET any (msg:"SHELLCODE x86 0x71FB7BAB NOOP unicode"; content:"q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|q|00 FB 00|{|00 AB 00|"; classtype:shellcode-detect; sid:2313; rev:2;)