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Full Discussion: Fake MicroSoft calls
Special Forums Cybersecurity Fake MicroSoft calls Post 303011356 by RudiC on Wednesday 17th of January 2018 07:25:55 AM
Old 01-17-2018
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..
 

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Time::Seconds(3pm)					 Perl Programmers Reference Guide					Time::Seconds(3pm)

NAME
Time::Seconds - a simple API to convert seconds to other date values SYNOPSIS
use Time::Piece; use Time::Seconds; my $t = localtime; $t += ONE_DAY; my $t2 = localtime; my $s = $t - $t2; print "Difference is: ", $s->days, " "; DESCRIPTION
This module is part of the Time::Piece distribution. It allows the user to find out the number of minutes, hours, days, weeks or years in a given number of seconds. It is returned by Time::Piece when you delta two Time::Piece objects. Time::Seconds also exports the following constants: ONE_DAY ONE_WEEK ONE_HOUR ONE_MINUTE ONE_MONTH ONE_YEAR ONE_FINANCIAL_MONTH LEAP_YEAR NON_LEAP_YEAR Since perl does not (yet?) support constant objects, these constants are in seconds only, so you cannot, for example, do this: "print ONE_WEEK->minutes;" METHODS
The following methods are available: my $val = Time::Seconds->new(SECONDS) $val->seconds; $val->minutes; $val->hours; $val->days; $val->weeks; $val->months; $val->financial_months; # 30 days $val->years; $val->pretty; # gives English representation of the delta The usual arithmetic (+,-,+=,-=) is also available on the objects. The methods make the assumption that there are 24 hours in a day, 7 days in a week, 365.24225 days in a year and 12 months in a year. (from The Calendar FAQ at http://www.tondering.dk/claus/calendar.html) AUTHOR
Matt Sergeant, matt@sergeant.org Tobias Brox, tobiasb@tobiasb.funcom.com BalieXXzs SzabieXX (dLux), dlux@kapu.hu LICENSE
Please see Time::Piece for the license. Bugs Currently the methods aren't as efficient as they could be, for reasons of clarity. This is probably a bad idea. perl v5.16.3 2013-03-04 Time::Seconds(3pm)
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