SI.L1-3.14.5 System & File Scanning

CMMC Practice SI.L1-3.14.5 – System & File Scanning: Perform periodic scans of the information system and real-time scans of files from external sources as files are downloaded, opened, or executed.

Links to Publicly Available Resources

Discussion [NIST SP 800-171 R2]
Periodic scans of organizational systems and real-time scans of files from external sources can detect malicious code. Malicious code can be encoded in various formats (e.g., UUENCODE, Unicode), contained within compressed or hidden files, or hidden in files using techniques such as steganography. Malicious code can be inserted into systems in a variety of ways including web accesses, electronic mail, electronic mail attachments, and portable storage devices. Malicious code insertions occur through the exploitation of system

Further Discussion
Use anti-malware software to scan for and identify viruses in your computer systems and determine how often scans are conducted. Real-time scans look at the system whenever new files are downloaded, opened, and saved. Periodic scans check previously saved files against
updated malware information.