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OS: Windows 10 64-bit updated, usually used for development and Steam-CSGO.

Straight to the point: Solitaire just tried to connect to the internet.

Details: After tightening my firewall rules after a RAT was installed by my friend (who then proceeded to unendingly open John Cena's theme song), I noticed Solitaire trying to connect to 40.122.214.188 which is owned by Microsoft and is part of the Xbox network. The problem is, I never even played any built-in games on my unit. I've never played Microsoft's Solitaire so outbound sync is out of the question. I don't use an Xbox. I also can't find any scheduled task for it. The system is completely clean when this happened.

Also, it seems to be in a suspended state, but still up.

enter image description here

The executable is located in

C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.7.1041.0_x64__8wekyb3d8bbwe which looks legit.

Should I allow it?

enter image description here

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    This seems completely normal to me. Solitaire is now a Windows Store app, and can connect to Microsoft's servers to deliver you personalized ads, collect statistics, etc. It's in fine print in the EULA for Windows. – Jonathan Gray Jan 14 '16 at 12:32
  • If someone installed some malware (in this case a RAT) the only solution to be almost 100% sure is to reinstall the machine. – André Borie Jan 14 '16 at 13:00
  • @JonathanGray I see. – Gene Dela Rosa Jan 14 '16 at 13:58
  • @AndréBorie It's clean. He made the RAT, and I've reviewed the source code. It doesn't modify anything, just gives him command line and desktop access. Also, I was in the same room as him when the incident happened. He didn't modify anything, just forked bombed the command start https://youtu.be/xE-piBUcSug – Gene Dela Rosa Jan 14 '16 at 14:01
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    Isn't it susupcious that the executable isn't signed? I thought all Microsoft executables would be signed by default, even the games. I don't have a Windows 10 installation to check that, though. – Philipp Jan 14 '16 at 15:09
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If you don't plan on ever playing Solitaire on your machine, why allow it through the firewall? You can always reverse your decision later if you decide to become a Solitaire fanatic, but until then it's safer to just deny Solitaire access.

I know it looks legit and it almost certainly is the application trying to connect with the Microsoft network to collect statistics, but who knows? In a year or so the Solitaire game could be found with a major security hole, and then you'll be glad you kept it denied under the firewall. The tiniest slightest risk isn't worth it if you never plan to play the game.

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