xelemental

#include <iostream>

using namespace std;

void multiply(int a, int b)
{
    cout << a * b << endl;
    
}
void multiply(double a, double b)

xelemental

fn main(){

about1("Rohan", 20, "PowerPC");
about2("Kumar", "ARM");
about3("Rohit", "India");

fn about1(value : &str, age: u64, processor_choice: &str){
println!("{} is {} and he is a {} enthusiast", value, age, processor_choice);
}

xelemental

(module
 (type $FUNCSIG$ii (func (param i32) (result i32)))
 (import "env" "puts" (func $puts (param i32) (result i32)))
 (table 0 anyfunc)
 (memory $0 1)
 (data (i32.const 16) "My first program in WASM\00")
 (export "memory" (memory $0))
 (export "main" (func $main))
 (func $main (; 1 ;) (result i32)
  (drop

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(module
  (type (;0;) (func (param i32 i32 i32) (result i32)))
  (type (;1;) (func (param i32) (result i32)))
  (type (;2;) (func (result i32)))
  (type (;3;) (func (param i32)))
  (type (;4;) (func))
  (type (;5;) (func (param i32 i32) (result i32)))
  (type (;6;) (func (param i32 i64 i32) (result i64)))
  (type (;7;) (func (param i32 i64 i64 i32)))
  (type (;8;) (func (param i32 i32 i32 i32 i32) (result i32)))

xelemental

• Crackmes.One https://crackmes.one/
• Reverse Engineering challenges https://challenges.re/
• Embedded Security CTF https://microcorruption.com/
• Beginner Malware Reversing Challenges https://www.malwaretech.com/beginner-malware-reversing-challenges
• RingZer0 https://ringzer0ctf.com/challenges

xelemental

Command line options

-L: List of supported IO plugins
-q: Exit after processing commands
-w: Write mode enabled
-i [file]: Interprets a r2 script
-A: Analyze executable at load time (xrefs, etc)
-n: Bare load. Do not load executable info as the entrypoint
-c 'cmds': Run r2 and execute commands (eg: r2 -wqc'wx 3c @ main')
-p [prj]: Creates a project for the file being analyzed (CC add a comment when opening a file as a project)

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• Variables:

                    var = For defining variables
                mov = move a value from place to another
              $RESULT = Stores the Result of an operation
  

• Conditional Jumps:

                    JNE = Jump if not equal
  

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- Run the code :F9
- Step into/ over instructions: F7/F8
- Execute until selecyted instruction : F4
- Execute until next return : Ctrl + F9
- Show Previous/next executed instructions: -/+
- Return to previous view : *
- Go to specific expression: Ctrl+g
- Insert comment/label : ;/;
- Show current function as a graph : g
- Find Specific pattern : Ctrl + b

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• Breakpoints

 → break <address> : Sets a new breakpoint
→ delete <breakpoint#> : Deletes a breakpoint
→ enable < breakpoint#> : Enable a disabled breakpoint

• Variables and memory display

→ print <query> : Prints content of variable or register.
→ display : Prints the information after stepping each instruction

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Navigation:

→ Back : Alt + <-
→ Forward : Ctrl + Alt + T
→ Next Instruction : Ctrl + Alt + I
→ Next Data : Ctrl + Alt + D
→ Next Undefined : Ctrl + Alt + U 
→ Next Label : Ctrl + Alt + U
→ Next Function : Ctrl + Alt + F
→ Previous function: Ctrl + ⬆️