Mission 0x25

🔎 Solution

After connecting via SSH as freya, the next task is to obtain the password for user alexa. The challenge hints that the password is periodically written to a .txt file inside /free, but the file is deleted every minute.

freya@venus:~$ cat mission.txt 
################
# MISSION 0x25 #
################

## EN ##
User alexa puts her password in a .txt file in /free every minute and then deletes it. 

Since the file is temporary, the approach is to continuously scan the directory and print the contents as soon as a matching .txt file appears. A simple loop achieves this:

freya@venus:~$ while true; do find /free -name "*.txt" -exec cat {} \; ; sleep 1; done
mxq9O3MSxxX9Q3S

Once the password is captured, a new SSH session is initiated with the discovered credential:

ssh alexa@venus.hackmyvm.eu -p 5000

Reading the file in the new user directory reveals the next flag:

alexa@venus:~$ cat flagz.txt 
8===12ALP3eLlJ1GrTBxwJQM===D~~

🚩Flag

8===12ALP3eLlJ1GrTBxwJQM===D~~