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OverTheWire Bandit Level 21 - 22

··82 words·1 min·
OverTheWire Bandit Linux Shell
Table of Contents

Prompt #

A program is running automatically at regular intervals from cron, the time-based job scheduler. Look in /etc/cron.d/ for the configuration and see what command is being executed.

Solution #

$ ssh bandit21@bandit.labs.overthewire.org -p 2220
bandit21@bandit.labs.overthewire.org password: gE269g2h3mw3pwgrj0Ha9Uoqen1c9DGr
bandit21@bandit:~$ ls /etc/cron.d/
cronjob_bandit15_root cronjob_bandit17_root cronjob_bandit22 cronjob_bandit23 cronjob_bandit24 cronjob_bandit25_root
bandit21@bandit:~$ cat /etc/cron.d/cronjob_bandit22
@reboot bandit22 /usr/bin/cronjob_bandit22.sh &> /dev/null
* * * * * bandit22 /usr/bin/cronjob_bandit22.sh &> /dev/null
bandit21@bandit:~$ cat /usr/bin/cronjob_bandit22.sh
#!/bin/bash
chmod 644 /tmp/t7O6lds9S0RqQh9aMcz6ShpAoZKF7fgv
cat /etc/bandit_pass/bandit22 > /tmp/t7O6lds9S0RqQh9aMcz6ShpAoZKF7fgv
bandit21@bandit:~$ cat /tmp/t7O6lds9S0RqQh9aMcz6ShpAoZKF7fgv
Yk7owGAcWjwMVRwrTesJEwB7WVOiILLI

References #