Questions tagged [shellcode]

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I know is easy to convert shellcode using disassemble tools such as distorm3, etc to assembly codes (00000000: 5c POP ESP), however, how do you revert these assembly codes back to their shellcodes. ...

hello i am writing windows 64bit reverse shell in assembly and after gett connected to the targetmachine ip, i want to create process to spwan a shell, fistly i try to write startinfo struct for ...

I'm trying to get around some input character restrictions by encrypting some data. However, when i try and XOR rbx back to my desired value I get an error stating operand mismatch. Am i missing ...

I found this solution for solving protostar's ctf stack5 challenge. The solution works, but I can't figure out how in the stack diagram section we get the address: 0xbffff800 . I understand that NOPs ...

im trying to make a small messagebox shellcode, using masm assembler, im doing so because im not that familiar with other syntaxes, this is the assembly code main.asm: EXTRN __imp_ExitProcess:PROC ...

I need to exploit the following code but not sure how to do it. The idea is to exploit the code trying to call the function which is not used call_me. Second idea is to exploit the code using a ...

I am on Linux. The hack I am trying get to work is a buffer overflow which overflows into the return address of the program's main() stackframe replacing it with the address pointing to the ...

Following this: How can I exploit a buffer overflow? I have a code compiled using -fno-stack-protector: #include <stdio.h> void shellcode(){ printf("\n Reached shellcode!"); } ...

I Created an executable that contains a Shell code. The ShellCode is suppose to execute calc.exe. I use CreateThread to execute the ShellCode. The Shellcode is indeed executed and calc.exe spawns. BUT!...

I am trying to write a "Hello World" program using stack memory. section .text global _start _start: mov al , 0x01 mov dil , al push 0x0a646c72 ...

I'm trying to buffer overflow and make the make the system execute mmap allocated address which would be a function of some simple instructions, namely mov $0x1, %rax ret the opcode array for this is ...

Now, the following code does what it's supposed to do, load calc.exe to memory and execute it, it does that fine. I've stitched together this code to show CreateThread() Killing my program's execution ...

I am trying to open a shell code using the following assembly code where I have tried to use JUMP CALL POP method. .section .text .globl main main: pushl %ebp movl %esp, %ebp pushl %ebx ...

Scope: I am trying to research on a malware where a ShellCode in HEX is statically declared in a variable. I am trying to make it dynamic so it can work on the same hex but taken from user input. The ...