St. Vincent's Health experienced a "sophisticated" cyberattack by hackers who allegedly used stolen login credentials to enter the database, The Sydney Morning Herald reports. Personal or health information stolen during the breach is unknown, as well as who was affected. Meanwhile, cybersecurity professionals claim organizations can lower the risk of a cyberattack by using complex passwords and changing passwords regularly. Research from telecommunications company Telstra found that more than 1.5 million Australians "keep their passwords somewhere easy to find."