Mission 0x15

🔎 Solution

After logging in as anna, the mission hint suggested that privilege escalation was the next step - specifically using sudo to become the user natalia:

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# MISSION 0x15 #
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## EN ##
Maybe sudo can help you to be natalia.

To switch to another user using sudo, the syntax is simple:

sudo -u <username> -i

So applying it here:

sudo -u natalia -i

The command worked, and the shell switched to natalia without prompting for a password - meaning anna was allowed to run commands as that user.

Once inside the new account, checking for readable files led directly to the next flag:

natalia@venus:~$ cat flagz.txt 
8===JWHa1GQq1AYrBWNXEJrH===D~~

🚩Flag

8===JWHa1GQq1AYrBWNXEJrH===D~~