Ghana: Microsoft Exchange Will Soon Block ISO Files By Default

20 September 2021

With the addition, the number of blocked files edges close to a hundred.

In order to thwart attempts by threat actors to sneak in malware inside certain files, Microsoft is appending ISO files, along with a couple of others, to the list of file types that won't be allowed to land in the inbox of Microsoft Exchange users.

ISO files are increasingly emerging as a popular enclosure for circulating malicious files and documents. Cybersecurity experts have warned that while Windows 10 can mount ISO files without relying on third-party tools, its contents aren't usually scanned by the operating system.

In fact, in a recent attack, threat actors relied on this behavior to pass compromised versions of documents that escaped Microsoft Office's Protected View protections just because they were rolled inside ISO files.

To prevent such attacks, Microsoft has tweaked the default policies of Microsoft Exchange to make sure that all emails with ISO file attachments are now automatically quarantined, giving users some pause to approach them more cautiously.

AllAfrica publishes around 800 reports a day from more than 100 news organizations and over 500 other institutions and individuals, representing a diversity of positions on every topic. We publish news and views ranging from vigorous opponents of governments to government publications and spokespersons. Publishers named above each report are responsible for their own content, which AllAfrica does not have the legal right to edit or correct.

Articles and commentaries that identify allAfrica.com as the publisher are produced or commissioned by AllAfrica. To address comments or complaints, please Contact us.

X