Cyren Security Blog

Facebook Users Hit With Coinminer Malware

by Maharlito Aquino and Kervin Alintanahin

The value of Bitcoin virtual currency just hit a new all-time high, and with it an increasing number of malware threats are targeting users to "borrow" their PC's CPU for use in mining the precious cryptocurrency, something we last wrote about in October here. Once executed, a significant spike in CPU resources can be seen by the user in the active processes list (if they look...).

Interview with a Botnet Hunter

by Avi Turiel

In this interview, Cyren botnet expert Geffen Tzur explains how botnets work and gives a view from the trenches on successes and challenges in fighting botnet cybercrime.

Analyst Report: Phishing Attacks Are a Business Problem, Not an IT Problem

by John Callon

Successful phishing attacks are all over the news and a top concern for IT managers, but how do you make the business case for adding more advanced email and web security? In a new report, security industry analyst Derek Brink of the Aberdeen Group has crunched the numbers and put $$$ on the real risks and cost impact to businesses of phishing attacks, giving calculations for companies of different sizes and in different industry sectors. A complimentary copy of the report is available for free download.

New Scarab Ransomware Using Necurs-as-a-Service

by Magni Reynir Sigurðsson

The new Scarab ransomware being distributed via email by the Necurs botnet appears to come from scanning devices or services like HP, Epson or Lexmark. While there are similarities to the Necurs-distributed Locky ransomware, Scarab seems to have been developed by a different malware author. Necurs began actively distributing Scarab on November 23rd (Thanksgiving Day in the U.S.). Cyren's security cloud blocked 13.3 million emails containing the Scarab attachment that day.

10 Cyber Threat Terms Every IT Manager Should Know

by John Callon

What's the difference between spear phishing, clone phishing, and just plain phishing? Check out the top 10 cyber threat terms every IT manager should know.

Black Friday/Cyber Monday Alert: 5 Shopping Scams That Could Seriously Affect Your Business

by John Callon

The last thing any company needs during the holiday season is the gift of ransomware on its IT systems. During this week’s build-up to Black Friday, Cyber Monday, and the actual holidays in and around them (remember those?), everyone is going to spend some time doing a little shopping while on a company device or network, especially if it means scoring a bargain.