Disable DDEAUTO for Microsoft Word, Excel, Outlook, versions 2010, 2013, 2016 Appears to block known DDE attacks.https://gist.github.com/wdormann/732bb88d9b5dd5a66c9f1e1498f31a1b …
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Replying to @wdormann
I pushed out GPO “Ignore Other Applications”, and now users can’t double-click to open xlsx files. MS KB says Excel uses dde to OPEN DOCS!!
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Replying to @diplomaticnate
I've confirmed this (quite silly) behavior. The "other applications" preference in Excel for DDE includes excel.exe itself!
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Replying to @wdormann
If there was an award for best example of Microsoft logic. :)
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Replying to @diplomaticnate
This is my lack of surprise. Perhaps best protection now is Win10 ASR plus the WordMail blocks in the original REG. Thx for your find!
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