Question

Lauren's network firewall denies all inbound traffic but allows all outbound traffic. While investigating a Windows workstation, she encounters a script that runs the following command: at \workstation10 20:30 every:F nc -nv 443 -e What does it do?

A. It opens a reverse shell for host using netcat every Friday at 8:30.
B. It uses the AT command to dial a remote host via NetBIOS.
C. It creates an HTTPS session to every Friday at 8:30.
D. It creates a VPN connection to every five days at 8:30 GST.

Answer 1

A script schedules a task to open a reverse shell using netcat on workstation10 every Friday at 8:30 PM, potentially bypassing firewall restrictions on inbound traffic.

Therefore, the correct answer is A: It opens a reverse shell for host using netcat every Friday at 8:30.

Step-by-step explanation:

The script appears to be scheduling a command to be run on workstation10 using the AT command, which is a way to schedule tasks on a Windows system.

The command itself uses netcat (nc) to initiate a connection to a remote host on port 443 (commonly used for HTTPS connections) and '-e' indicates an execution of a program, which in many cases would be a reverse shell. Considering the parameters '20:30' and 'every:F', it looks like this task is scheduled to run at 8:30 PM every Friday.

Therefore, the correct answer is A: It opens a reverse shell for host using netcat every Friday at 8:30. This would allow an external party to connect back to the machine at the specified time, potentially bypassing the firewall since outbound connections are allowed.