On October 4, Nikkei Inc. announced that its employees' Microsoft 365 accounts were targeted in a cyber attack, resulting in approximately 9,000 phishing emails being sent. The company suspects unauthorized access by a third party, leading to potential leaks of email addresses, names, and some email content.
This incident is significant as it highlights the vulnerabilities associated with widely used business software like Microsoft 365. Following the unauthorized access, Nikkei changed the account passwords and has not detected further breaches. They have contacted recipients of the phishing emails to request deletion of the messages and are investigating the extent of the data leak with the Personal Information Protection Commission.
Additionally, on the same day, Nikkei BP reported unauthorized access to employee email accounts, raising concerns about the potential leak of personal information of email contacts. Nikkei has urged recipients of suspicious emails to reach out via their inquiry form, indicating an increased risk of impersonation attempts using their email addresses.
Editor's Note
The recent cyber attack on Nikkei underscores the critical need for robust cybersecurity measures in organizations utilizing cloud-based services like Microsoft 365. As phishing attacks become more sophisticated, companies must prioritize employee training and incident response strategies to mitigate risks associated with data breaches and unauthorized access.
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