An Attacker Writes a Script Similar to the One Given

Multiple Choice

An attacker writes a script similar to the one given. What is he trying to accomplish?
FOR /F "token=1, 2*" %i in passlist.txt do net use \\target\IPC$ %i /u: %j

A) Send a virus disguised as "passlist.txt" to the target
B) Password guessing from a list
C) Backdoor the target host with an undocumented feature of Windows
D) Access the IPC$ share with a strong authentication token