README: Added instructions to gain root access on kali.boysbrigade.au server

- Added tutorial for gaining root access on the kali.boysbrigade.au server.
- Included a new file H1.md with instructions on how to change shell using su command.
- Renamed README.md to OPTIONAL-keylogger.md and updated its content to reflect the changes in task description.

H1.md

@@ -0,0 +1,4 @@
+You can use the `su --help` command to see how to use it.  
+Look for any option to change shell.
+
+The command to use is `su bob -s /bin/bash`

OPTIONAL-keylogger.md

@@ -0,0 +1,47 @@
+# OPTIONAL BB-Pen-2
+
+The task this week is to create a simple keylogger that will log all the keys pressed on the keyboard and save them to a file.  
+The program should run in the background and not be visible to the user.  
+
+## Requirements
+- Access to the kali.boysbrigade.au server (or another linux machine) (This will be provided)
+
+## Instructions
+1. SSH into the server using the provided credentials following the instructions from last week.
+2. Create a new directory for your project and navigate into it. (Put your name in the directory name to avoid conflicts between other members)
+3. In that directory create a new executable file to run the keylogger.
+4. Write a script (file that ends in .sh) that will log all the keys pressed on the keyboard and save them to a file.
+5. Try to make the keylogger look like it is not running (Hint: show the user a fake command prompt)
+
+## Running the keylogger
+```sh
+# Run normally
+./keylogger.sh
+# Run so that it will close the SSH session when you close the logger
+exec ./keylogger.sh
+```
+
+## Hints
+1. Infinite loop:
+    ```sh
+    while true
+    do
+        # Your code here
+        # Will run forever
+    done
+    ```
+2. Get an input from the user:
+    ```sh
+    read -p "Enter something: " input
+    echo "You inputed $input"
+    ```
+3. Get the message of the day (Screen that appears when you login):
+    ```sh
+    cat /etc/motd
+    ```
+4. Run a variable as a command:
+    ```sh
+    command="ls"
+    $command
+    # This will run the 'ls' command
+    ```

README.md

@@ -1,47 +1,28 @@
 # BB-Pen-2
 
-The task this week is to create a simple keylogger that will log all the keys pressed on the keyboard and save them to a file.  
+The task this week is to get root access on the kali.boysbrigade.au server.  
-The program should run in the background and not be visible to the user.  
+You have been given a user account on the server (from BB-Pen-1).  
+Use this account to gain access to the admin account.
 
-## Requirements
+## Tutorial
-- Access to the kali.boysbrigade.au server (or another linux machine) (This will be provided)
+1. Login as `bob` (password in seconduser.pass from `gituser`).
+2. See if you can change directory to test  
+You probably get this message`-rbash: cd: restricted`.  
+This means that you are in a restricted shell. Try to login to a normal shell (`/bin/bash`).  
+Hint `su` is the command to switch user (switch to yourself).  
+Need help? Look in [H1.md](H1.md) for help.
 
-## Instructions
+3. Once you have a normal shell, try to change directory to test again.  
-1. SSH into the server using the provided credentials following the instructions from last week.
+If you are able to change directory, go back to the home directory (just run `cd`).  
-2. Create a new directory for your project and navigate into it. (Put your name in the directory name to avoid conflicts between other members)
-3. In that directory create a new executable file to run the keylogger.
-4. Write a script (file that ends in .sh) that will log all the keys pressed on the keyboard and save them to a file.
-5. Try to make the keylogger look like it is not running (Hint: show the user a fake command prompt)
 
-## Running the keylogger
+4. One of the best ways to get root access is to find a program that is running as root, and exploit it.  
-```sh
+Run `cat /etc/crontab` to see all the commands that are run on a schedule by the admin.  
-# Run normally
+Notice anything you can exploit?
-./keylogger.sh
+
-# Run so that it will close the SSH session when you close the logger
+5. If you found something, try to exploit it.  
-exec ./keylogger.sh
+Something you can try is running this to add yourself to the sudo (admin) group.
+```bash
+echo 'bob  ALL=(ALL:ALL) ALL' >> /etc/sudoers
 ```
-
+See if you are able to run `sudo whoami`. This should print `root` if you have admin access.  
-## Hints
+(You might need to wait a minute for the cron job to run)
-1. Infinite loop:
-    ```sh
-    while true
-    do
-        # Your code here
-        # Will run forever
-    done
-    ```
-2. Get an input from the user:
-    ```sh
-    read -p "Enter something: " input
-    echo "You inputed $input"
-    ```
-3. Get the message of the day (Screen that appears when you login):
-    ```sh
-    cat /etc/motd
-    ```
-4. Run a variable as a command:
-    ```sh
-    command="ls"
-    $command
-    # This will run the 'ls' command
-    ```