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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Have you ever been researching how Microsoft goes through every "clicked" link posted on Teams chat? (lemmy.ml)

submitted 2 weeks ago by xelar@lemmy.ml to c/linux@lemmy.ml

3 comments fedilink hide all child comments

I have seen many scan entries on nginx while sharing links on Teams recently. At first I thought its some type of brute force. Even abuseipdb reports categorize it as web attack.

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[–] hemko@lemmy.dbzer0.com 11 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

I don't know any of the technical details behind, but what I've noticed there's at least couple things that seem to happen when you send a link in teams;

Microsoft defender scans that linked site and tries to figure out whether it may be "harmful"
Attempts to scrape the site, render, screenshot it and embed a picture of the site contents to show to the recipient
Replaces the link with defender link that forwards the user to the website

That link safety thing is probably quite intrusive when scanning the destination webpage

[–] joshcodes@programming.dev 9 points 2 weeks ago* (last edited 2 weeks ago)

Some documentation to add to this: https://learn.microsoft.com/en-us/defender-office-365/safe-links-about

Basically its a URL wrapper that provides continuity for the user, so if they dont have a threat intel database entry for the site, they let the user go there. They scan in the background as hemko said above to determine maliciousness.

Worth mentioning they do it for email too if you have it enabled.