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Windows x64 Assembly

Introduction to x64 Assembly on Windows.

THM Room https://tryhackme.com/room/win64assembly

TASK 1 : Introduction

No answer needed

TASK 2 : Number Systems

What is 0xA in decimal?

Answer : 10

What is decimal 25 in hexadecimal? Include the prefix for hexadecimal.

Answer : 0x19

TASK 3 : Bits and Bytes

How many bytes is a WORD ?

Answer : 2

How many bits is a WORD ?

Answer : 16

TASK 4 : Binary Operations

What is the result of the binary operation: 1011 AND 1100 ?

Answer : 1000

What is the result of the binary operation: 1011 NAND 1100? Include leading zeroes.

Answer : 0111

TASK 5 : Registers

How many bytes is RAX ?

Answer : 8

How many bytes is EAX ?

Answer : 4

TASK 6 : Instructions

What instruction returns from a function ?

Answer : ret

What instruction will call/execute a function ?

Answer : call

What instruction could be used to save a register in a way that it can later be restored ?

Answer : push

TASK 7 : Flags

If two equal values are compared to each other, what will ZF be set to as result of the comparison ?

Answer : 1

TASK 8 : Calling Conventions

In fastcall, what 64-bit register will hold the return value of a function ?

Answer : RAX

In fastcall, what register is the first function parameter passed in ?

Answer : RCX

TASK 9 : Memory Layout

In what order is data taken off of or put onto the stack? Provide the acronym.

Answer : LIFO (Last In First Out)

TASK 10 : Final thoughts

Go forth and do great things !
No Answer

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