These were some of the biggest email security threats of last year | #emailsecurity

Covid-19-themed email threats still dominate the email threat landscape, a new report from cybersecurity experts Trustwave says. These threats are often combined with malicious Office documents and compromised Office 365 accounts for maximum impact. 

According to the report, Microsoft Excel file attachments were the single biggest attachment type used by criminals last year, as they took up 39 percent of all malicious files shared (up from just seven percent a year prior). Of all those files, almost half (43 percent) used Excel 4.0 macros.

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