WhatsApp web and desktop users are being targeted by a large-scale malware distribution campaign that could give criminals unauthorised access and compromise their devices, national cybersecurity watchdog CertIn said in a note. The Indian Computer Emergency Response Team has warned WhatsApp web and desktop users to be cautious of any attachments, even if they come from a friend, colleague or family member. "It has been observed that a large-scale malware distribution campaign is targeting WhatsApp Desktop and WhatsApp Web users.