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# Blood Bash 4
![Category](http://img.shields.io/badge/Category-Forensics-orange?style=for-the-badge) ![Points](http://img.shields.io/badge/Points-200-brightgreen?style=for-the-badge)

## Details

>A sensitive file from De Monne was exfiltrated by mort1cia. It contains data relating to a new web portal they're creating for their consumers. Read the contents of the file and return the flag as `flag{flag_goes_here}`.
>
> Username: `bl0ody_mary`
> Password: `d34df4c3`
>
> `bloodbash.deadface.io:22`
---

Connect to shell...

Run: `la -al`

```
[email protected]:/home/bl0ody_mary# ls -al
total 68
drwxr-xr-x 1 bl0ody_mary bl0ody_mary 4096 Sep 16 12:51 .
drwxr-xr-x 1 root root 4096 Sep 14 19:15 ..
-rw------- 1 bl0ody_mary bl0ody_mary 1 Sep 16 14:44 .bash_history
-rw-r--r-- 1 bl0ody_mary bl0ody_mary 220 Sep 14 19:15 .bash_logout
-rw-r--r-- 1 bl0ody_mary bl0ody_mary 3771 Sep 14 19:15 .bashrc
-rw-r--r-- 1 bl0ody_mary bl0ody_mary 807 Sep 14 19:15 .profile
-rw-r--r-- 1 bl0ody_mary bl0ody_mary 12444 Sep 14 20:20 'De Monne Customer Portal.pdf'
drwxr-xr-x 2 bl0ody_mary bl0ody_mary 4096 Sep 14 19:16 Documents
drwxr-xr-x 2 bl0ody_mary bl0ody_mary 4096 Sep 14 19:15 Downloads
drwxr-xr-x 2 bl0ody_mary bl0ody_mary 4096 Sep 14 19:15 Music
drwxr-xr-x 2 bl0ody_mary bl0ody_mary 4096 Sep 14 19:15 Pictures
drwxr-xr-x 2 bl0ody_mary bl0ody_mary 4096 Sep 14 19:15 Videos
```

Note the file `De\ Monne\ Customer\ Portal.pdf`

Then we use: `base64 De\ Monne\ Customer\ Portal.pdf`

Copy Base64 encoded string from shell;

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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAg
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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAg
ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
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```

On youe local machine paste the b64 string into a file and save as `encoded`

Then run `base64 -d encoded > file.pdf`

Open the resulting pdf file in your favourite PDF viewer to see the flag;

![image](https://user-images.githubusercontent.com/73170900/137818406-c4c83588-6ad9-4a7d-97d1-2d909eb86a32.png)

## flag{deM0nn3_dat4_4_us}

Original writeup (https://github.com/CTSecUK/DEADFACE_CTF_2021/blob/main/Write-ups/Forensics/Blood%20Bash%204%20(200%20Points).md).