5.2 Malicious software (malware) is prevented, or detected and addressed.
This requirement focuses on implementing anti-malware solutions to protect systems from malicious software. It ensures that organizations deploy appropriate controls to prevent, detect, and address malware threats across their environment.
Sub-requirements:
- 5.2.1 An anti-malware solution(s) is deployed on all system components, except for those system components identified in periodic evaluations per Requirement 5.2.3 that concludes the system components are not at risk from malware.
- 5.2.3.1 The frequency of periodic evaluations of system components identified as not at risk for malware is defined in the entity's targeted risk analysis, which is performed according to all elements specified in Requirement 12.3.1.
- 5.2.2 The deployed anti-malware solution(s):
- 5.2.3 Any system components that are not at risk for malware are evaluated periodically to include the following:
5.2. Malicious software (malware) is prevented, or detected and addressed.
Ensure anti-malware solutions are deployed, updated, and monitored on all systems commonly affected by malware.
Key Risks
Frequently Asked Questions
What systems require anti-malware solutions?
All systems commonly affected by malicious software, including desktops, laptops, and servers.
How should anti-malware solutions be managed?
They must be kept up to date, perform regular scans, and generate audit logs.
Can users disable anti-malware protection?
No. Anti-malware mechanisms must not be alterable or disabled by users unless specifically authorized.
How are malware alerts handled?
Alerts should be monitored and responded to promptly as part of the incident response process.
What about systems not commonly affected by malware?
These must be evaluated regularly, and anti-malware must be implemented if the risk changes.
Common QSA Questions
Can you show evidence of anti-malware deployment and updates?
Yes, we maintain deployment records and logs showing regular updates for all in-scope systems.
How do you monitor for malware infections and alerts?
We use centralized management consoles and SIEM integration to monitor and respond to alerts.
How do you handle systems that are not commonly affected by malware?
We conduct regular risk assessments and deploy anti-malware if the threat landscape changes.
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