Bureau $121$ is the North Korean agency conducting cyber war. Their offensive cyber operations may be seen as a cost$-$effective way to develop asymmetric and deniable military options. From the following list select ONE challenge of finding evidence of their threat reconnaissance in log files.

None of the answers are correct.

The volume of log file entries make it difficult to find indicators of threat reconnaissance.

Log files are binary and therefore cannot be easily accessed.

North Korea couldn't possibly infiltrate a US government network.