Submit Ticket Remote Support Contact Us

We do IT differently.

Call 866.707.5869 for more information.

Friday the 13th Flashback: Jerusalem
July 13, 2018

Friday the 13th Flashback: Jerusalem

It’s Friday the 13th and most people think of today as a day full of silly superstitions, but for computer users in the 1980’s and 90’s, Friday the 13th was a day to truly be afraid.

The Beast Itself

In 1987, a virus called “Friday the 13th” (aka Jerusalem) was created to activate and reactivate on infected computers every Friday the 13th to delete any files or programs used that day. This virus was truly a computer user’s worst nightmare. Friday the 13th could spread through CD-ROMs, floppy disks, or email attachments. It would reduce your computer’s memory, slow it down, and possibly wipe away new files from that day.

jerusalem profile

Technology Isn’t the Only Thing Advancing…

Luckily, with the advancements made in technology and cyber security this virus, and others like it have become obsolete. On the other hand, and unfortunately for us, advancements in technology means advancements in malware, hacking, and cyber threats in general. However, if “Friday the 13th” taught us anything, it’s that being proactive is key. If users at that time had been able to detect the virus before infection, the damage could have been greatly minimized or prevented altogether.

Proactive Not Reactive!

Today, it is more important than ever to prevent a breach rather than react to it. At Sierra, we provide 24/7 monitoring support 365 days a year, as well as top-of-the-line penetration testing to ensure that your infrastructure is safe and remains that way. If you’re interested in any of our monitoring solutions or receiving a full security assessment contact us today to get your free consultation.


Sierra Experts is an IT Managed Service and Support provider, specializing in IT Monitoring and Management, Cloud/Virtual Systems, Hosting, VoIP/SIP PBX Trunks and Solutions, Physical Server Hosting, Website Design and Development, Software Development, and Hardware and Software reselling. For more, check out www.SierraExperts.com