It is the address of one of the distribution servers. Since this is not "one server", but a cluster of servers, your "suspicious" server shows only one thing: those "suspicious" flags are suspicious by themselves:

this particular server ist down since some time and only reports back a broken html page telling "<h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>06cvkZAAAAAA8FvmXFYIOTZ2TS15AJl0/RFVTMzBFREdFMDkxNwBFZGdl"

If this is enough to get flagged as "suspicious" ...


Am Di., 22.Aug..2023 um 16:12:51 schrieb Dom Woods - BGS via Cygwin:
Hi Cygwin,

I scanned your application through Virus Total as per our company policy and 
noticed that the installation process calls out to a suspicious Microsoft IP 
13.107.4.50, this ip has been flagged by 8 vendors as malicious, I get varying 
responses for what it is used for (an os updater or a file distributer) and 
wanted to ask what does Cygwin use it for? I can't seem to contact it with 
nslookup or ping it and Virus Total says that it gives a 'status 400' results 
so it might not be in use anymore anyway but just wanted to check.

Here is your Virus Total graph results: 
https://www.virustotal.com/graph/6bad4555154b3b348d1bfb633a2e9d6086aa46e36952f456a434ecef5b0010e0
Here is the scan of the IP address' results: 
https://www.virustotal.com/gui/url/3397a00da1c5aa448611892c12d38fee37fcd60321720a6e242cb0167e381901/detection


Kind regards,
Dom woods




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