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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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timetrans(3pm)						User Contributed Perl Documentation					    timetrans(3pm)

NAME
Net::DNS::SEC::Tools::timetrans - Convert an integer seconds count into text units. SYNOPSIS
use Net::DNS::SEC::Tools::timetrans; $timestring = timetrans(86488); $timestring = fuzzytimetrans(86488); DESCRIPTION
The timetrans() interface in Net::DNS::SEC::Tools::timetrans converts an integer seconds count into the equivalent number of days, hours, and minutes. The time converted is a relative time, not an absolute time. The returned time is given in terms of days, hours, minutes, and seconds, as required to express the seconds count appropriately. The fuzzytimetrans() interface converts an integer seconds count into the equivalent number of weeks or days or hours or minutes. The unit chosen is that which is most natural for the seconds count. One decimal place of precision is included in the result. INTERFACES
The interfaces to the Net::DNS::SEC::Tools::timetrans module are given below. timetrans() This routine converts an integer seconds count into the equivalent number of days, hours, and minutes. This converted seconds count is returned as a text string. The seconds count must be greater than zero or an error will be returned. Return Values: If a valid seconds count was given, the count converted into the appropriate text string will be returned. An empty string is returned if no seconds count was given or if the seconds count is less than one. fuzzytimetrans() This routine converts an integer seconds count into the equivalent number of weeks, days, hours, or minutes. This converted seconds count is returned as a text string. The seconds count must be greater than zero or an error will be returned. Return Values: If a valid seconds count was given, the count converted into the appropriate text string will be returned. An empty string is returned if no seconds count was given or if the seconds count is less than one. EXAMPLES
timetrans(400) returns 6 minutes, 40 seconds timetrans(420) returns 7 minutes timetrans(888) returns 14 minutes, 48 seconds timetrans(86400) returns 1 day timetrans(86488) returns 1 day, 28 seconds timetrans(715000) returns 8 days, 6 hours, 36 minutes, 40 second timetrans(720000) returns 8 days, 8 hours fuzzytimetrans(400) returns 6.7 minutes fuzzytimetrans(420) returns 7.0 minutes fuzzytimetrans(888) returns 14.8 minutes fuzzytimetrans(86400) returns 1.0 day fuzzytimetrans(86488) returns 1.0 day fuzzytimetrans(715000) returns 1.2 weeks fuzzytimetrans(720000) returns 1.2 weeks COPYRIGHT
Copyright 2004-2012 SPARTA, Inc. All rights reserved. See the COPYING file included with the DNSSEC-Tools package for details. AUTHOR
Wayne Morrison, tewok@tislabs.com SEE ALSO
timetrans(1) perl v5.14.2 2012-06-18 timetrans(3pm)
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