CompTIA Advanced Security Practitioner (CASP) Question 33

A forensics analyst suspects that a breach has occurred. Security logs show the company’s OS patch system may be compromised, and it is serving patches that contain a zero-day exploit and backdoor. The analyst extracts an executable file from a packet capture of communication between a client computer and the patch server.

Which of the following should the analyst use to confirm this suspicion?

A. File size
B. Digital signature
C. Checksums
D. Anti-malware software
E. Sandboxing

Correct Answer: B