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Staving off Email-Based Cyberattacks

Since the beginning of cybercrime, businesses have been vulnerable to a gamut of email-based threats. One of organizations’ weakest links, emails have been the portal that cyber criminals have leveraged over and over to deliver malwares and bots.

The option to reject or delete emails from unknown senders with attachments was always a part of Microsoft 365’s email service, but isn’t enough in the present-day threat landscape. Experts recommend blocking .zip and .mov top-level domains (TLDs) from the network for good measure.

Image: Sulagna Saha @ Gestalt IT

Joey D’Antoni, IT veteran and Field Day delegate, takes the readers through the process of enabling it, in his blog “Blocking .zip and .mov Top Level Domains from Office 365 Email”. He writes,

Last week, Google announced that they were selling domain registrations for the .zip and .mov top-level domains (TLDs). Google registered these TLDs as part of ICANN’s generic top level domain program. Spammers and threat actors everywhere have rejoiced at this notion–.zip and .mov files are very common malware vectors. While there haven’t been any real-world observations of attacks the SANS institute is recommended proactively blocking these domains from your network, until we better understand their behavior.

To learn how these domains can be blocked, read his blog – “Blocking .zip and .mov Top Level Domains from Office 365 Email”. For more such stories, sign up to our weekly newsletter and get notified about interesting posts from our community.

About the author

Sulagna Saha

Sulagna Saha is a writer at Gestalt IT where she covers all the latest in enterprise IT. She has written widely on miscellaneous topics. On she writes about the hottest technologies in Cloud, AI, Security and sundry.

A writer by day and reader by night, Sulagna can be found busy with a book or browsing through a bookstore in her free time. She also likes cooking fancy things on leisurely weekends. Traveling and movies are other things high on her list of passions. Sulagna works out of the Gestalt IT office in Hudson, Ohio.