01-17-2018
15,129,
5,008
Join Date: Jul 2012
Last Activity: 4 May 2020, 4:31 PM EDT
Location: Aachen, Germany
Posts: 15,129
Thanks Given: 735
Thanked 5,008 Times in 4,483 Posts
Fake MicroSoft calls
Dear colleagues,
it's that time of the year again: in recent days and weeks I'm receiving annoying numbers of annoying "support" calls from dubious "MicroSoft Centers" telling me that my computer generates errors and / or downloads malicious SW. Although ignoring these pesterers on the phone, I'm a bit concerned as I can't assess the danger they pose, coming in via VoIP.
Very few ports are open on my PC interface: SunRPC and 766 (both listened on by rpcbind), CUPS, DNS and Link-Local Multicast Name Resolution (both listened on by systemd-resolve). On my router, none of the common ports is open to the WAN.
No indication (yet) of remote interaction (attempts) in my system log file.
Does anyone of you have an idea or indication, what the threat would be and how I could prevent any damage? Can they, from VoIP connection / communication data, infer / deduct / extract information allowing them to harm?
Rgds
Rüdiger
Last edited by RudiC; 01-17-2018 at 09:40 AM..
