PCI DSS Requirement 5: Anti-Malware and Phishing Protection (5.4.1)

Requirement Structure

Deep Dives

• 5.2.1 / 5.2.2 - Deploy anti-malware on all system components except those periodic evaluations under 5.2.3 conclude are not at risk; the solution detects and removes, blocks, or contains all known types of malware.
• 5.2.3 / 5.2.3.1 - Document components without anti-malware; evaluate evolving threats; confirm they still do not need protection; evaluation frequency defined in a 12.3.1 targeted risk analysis (5.2.3.1 mandatory since 31 March 2025).
• 5.3.1 - Keep anti-malware current via automatic updates.
• 5.3.2 / 5.3.2.1 - Periodic scans and active or real-time scans, OR continuous behavioral analysis; if using periodic scans, frequency via a 12.3.1 TRA (5.3.2.1 mandatory since 31 March 2025).
• 5.3.3 - Removable electronic media: automatic scan on insert, connect, or mount, OR continuous behavioral analysis while mounted (mandatory since 31 March 2025).
• 5.3.4 - Anti-malware audit logs enabled and retained in accordance with Requirement 10.5.1.
• 5.3.5 - Users cannot disable or alter anti-malware unless specifically documented and authorized by management on a case-by-case basis for a limited time.
• 5.4.1 - Processes and automated mechanisms to detect and protect personnel against phishing attacks (mandatory since 31 March 2025). Distinct from awareness training under 12.6.3.1.

How CyberSilo Helps

• ThreatHawk SIEM - anti-malware and phishing-control telemetry and alert evidence
• Compliance Standards Automation - map Requirement 5 artefacts to continuous evidence

Frequently Asked Questions

Does antivirus alone satisfy Requirement 5?

You need deployment coverage (or documented 5.2.3 exceptions), currency, scanning or behavioral analysis, removable-media controls, logs retained per 10.5.1, disablement controls, and 5.4.1 phishing mechanisms.

Is 5.4.1 the same as phishing awareness training?

No. 5.4.1 is technical automated phishing protection. 12.6.3.1 is security awareness training about phishing and social engineering. One does not satisfy the other.

Can some systems skip anti-malware?

Only if periodic evaluations under 5.2.3 document that those components are not at risk from malware, with evaluation frequency defined in a 5.2.3.1 / 12.3.1 targeted risk analysis.

Related PCI Resources

PCI DSS hub · 12 requirements explained · Requirement 10 · Requirement 12