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ISACA Certified Information Systems Auditor · Isaca
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Allowing only corporate IM solutions doesn't inherently stop transferring malware. In an IM environment, the most common delivery method for a malicious payload is a file attachment. Hence, the answer is B.
Allowing only corporate IM solutions
The question asks for the BEST control to mitigate malware risk associated with instant messaging (IM) systems. The primary malware threat in IM generally comes from: • File transfers • Attachments • Links delivering malicious payloads Therefore, the most direct and effective control to reduce malware infection is to: Block attachments in IM This prevents users from receiving or downloading malicious files through IM channels.