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Trap command allows the program/shell to specify commands that need to be executed on receiving pre-defined interrupt signals (e.g. .
In this lab, we are given SSH access on the target machine. The flag is not on the machine yet. Once the "wait" file present in the user's home directory is deleted, the real user will log into the systems and save the flag in the user's home directory. However, on the deletion of this file, the password will be changed, SSH will be restarted and all newly started processed will be killed. Also, any maintaining access method deployed before the user sends Ctrl+C signal might get killed. So, it is advisable to deploy the mechanism after the user sends Ctrl+C.
Initial SSH Credentials
- Maintain access on the target machine using TRAP command.
- Retrieve the flag.
- This lab is dedicated to you! No other users are on this network :)
- Once you start the lab, you will have access to a root terminal of a Kali instance
- Your Kali has an interface with IP address 192.X.Y.Z. Run "ip addr" to know the values of X and Y.
- The target server should be located at the IP address 192.X.Y.3.
- Do not attack the gateway located at IP address 192.X.Y.1
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
Users violating the above will be either temporarily or permanently banned from the website.
If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.
Technical Support for this Lab:
There is a reason we provide unlimited lab time: you can take as much time as you need to solve a lab. However, we realize that sometimes hints might be necessary to keep you motivated!
We currently provide technical support limited to:
- Giving hints for a lab exercise
- In rare circumstances, if you have totally given up (NO!!!) then tell you how to solve it. This will be limited to sharing the solution video or lab report
- A lab exercise fails to load or has errors in it
If you need technical support, please email firstname.lastname@example.org clearly mention the name and link of the lab exercise and other essential details. The more descriptive you are, the faster we can help you. We will get back to you within 24 hours or less.
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