Internet Security Week – Issue 116

In the 116th edition of Internet Security Week , ransomware has already hit half of the companies in Brazil, malware in Windows event logs, flaws in Word and PDF scripts and much more.

News

Ransomware becomes more sophisticated and has already reached half of the companies in Brazil

Fifty-five percent of Brazilian companies were hit by at least one ransomware attack in 2021, a figure that follows the global average growth in the number of attacks and serves only as a gateway to a scenario of greater sophistication and professionalization of cybercrime.

By Felipe Demartini on Canaltech

Group exposes documents stolen from high-end real estate company in São Paulo

The group calling itself Matron, which on March 7th and 8th began publishing documents bearing the Lopes Prime Real Estate logo, is the largest leak of documents apparently downloaded from the company's network or that of a related company: 1,539 image files (JPG and PDF), totaling 606 megabytes.

By Paulo Brito in CISO Advisor

The 3 Most Dangerous Types of Android Malware

Learn about the most dangerous types of malware for Android and how they can affect devices running this operating system.

By Lukas Stefanko in We Live Security

Hackers Now Hiding Malware in Windows Event Logs

Security researchers have noticed a malicious campaign that used Windows event logs to store malware, a technique that had not previously been publicly documented for attacks in the wild.

By Ionut Ilascu in Bleeping Computer

Researchers find 134 flaws in the way Word and PDFs handle scripts

Researchers have created a tool that detects flaws in the way Microsoft Word and Adobe Acrobat process JavaScript, and it has proven so effective that it found 134 bugs, 59 of which were deemed worthy of fix by the vendors.

By Simon Sharwood in The Register

How to block pornography and violence sites with MikroTik?

This question is common for network administrators who use MikroTik to control the internet. After all, blocking pornographic and violent websites helps prevent children from being exposed to explicit content on home networks and in preschools, for example, or wasting employees' time on corporate networks.

By Aléx de Oliveira on the Lumiun Blog

Fake WHO email distributes Trojan horse undetectable by antivirus

A new remote access Trojan has been identified by security firm Proofpoint. The threat, named Nerbian RAT, has several functions, notably the ability to evade detection by security solutions. Its distribution is carried out through fake communications from the World Health Organization.

By Dácio Castelo Branco on Canaltech

21% of corporate PCs in Brazil were at risk in 2021

Business PC users worldwide had an average 15.1% chance of encountering a threat last year, while in Brazil that percentage was 21%, placing the country 39th among the 77 nations included in security company Avast's 2020 Global PC Risk Report.

In CISO Advisor