A sophisticated attack exploits trust in the Google brand: Hackers are using meeting invitations to trick users into clicking malicious links. In recent weeks, a phishing attack has been observed where hackers exploit the popularity and credibility of Google Calendar to send fake invitations. Check Point researchers note that attackers spoof the “sender” details so that the invitations appear to originate from a legitimate user through the Google Calendar system. Hidden within the invitation is a link leading to malicious forms or Google Drawing pages; in some cases, attackers send a Calendar file containing a link to a suspicious document.
Well-known brands exploited: Global companies at risk due to user platform trust
At least 300 brands have been exploited by attackers in this campaign, with researchers observing more than 4,000 of these phishing messages within a four-week period. Google Calendar has over 500 million users across 41 languages, and attackers are leveraging the high level of trust in the service. Once a user clicks the link, stolen information may be used in financial fraud, such as unauthorized purchases. Additionally, hackers may bypass security measures and compromise other organizational systems.
Increased risk for businesses using Google services: Email blocking and proper security configurations can mitigate fraud
Many companies utilize Google services to manage their operations, making them more susceptible to this type of phishing attack. Recommendations include limiting or blocking external email services and relying on corporate email infrastructure, such as Outlook. Furthermore, changing Google Calendar settings to prevent events from being added automatically and minimizing the display of declined events can reduce the risk.
Cybersecurity Expert Recommendations:
* Implement advanced Google Calendar settings: Disable the automatic addition of events and enable alerts for invitations from unknown sources.
* Real-time monitoring systems: Deploy tools and procedures for the rapid detection of unusual messages or invitations before employees click on them.
* Block non-corporate email services: Limit access to external mail services on organizational devices to reduce the phishing attack surface.
* Employee cybersecurity awareness: Conduct ongoing training on identifying phishing attacks and emphasize the use of strong passwords and Multi-Factor Authentication (MFA).
In Conclusion:
The phishing attack based on Google Calendar invitations illustrates the attackers’ ability to exploit popular online services to steal sensitive information. Organizations and individuals relying on Google products must take precautions—ranging from adjusting basic settings to blocking external mail services—to prevent fatal damage to both business and personal data.
For further information: https://www.scworld.com/news/criminals-using-google-calendar-email-invites-to-steal-data-from-users
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