9/20/2023 0 Comments Disable macros in excel documentExcel 4.0 macros have been widely abused over the past two yearsĪs with most Office tools that allow basic scripting-like actions, the feature has been abused over the course of the past decades by both financially motivated groups and state-sponsored threat actors alike.īut the abuse has never been as rampant as it has been since early 2020 when several security researchers noted the sudden and unexplainable increased attention XLM macros had been getting from numerous top-tier threat actors. While XLM macros were replaced with the release of Excel 5.0, which introduced VBA-based macros, support for this feature has remained inside the Office Excel software to this day. Introduced in 1992 with the release of the Excel 4.0 software - from where the feature also gets its name - XLM macros allow users to enter complex formulas inside Excel cells that can execute commands, either inside Excel or the local filesystem. Microsoft plans to disable a legacy feature known as Excel 4.0 macros, also XLM macros, for all Microsoft 365 users by the end of the year, according to an email the company has sent customers this week, also seen by The Record. Microsoft to disable Excel 4.0 macros, one of the most abused Office features
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