Internet Security Week – Edition No. 116

In edition nº 116 of Internet Security Week , ransomware has already reached half of 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

55% of Brazilian companies were hit by at least one ransomware scam 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 agency in SP

The group calling itself Matron, which on March 7th and 8th began publishing documents with the letterhead of Imobiliária Lopes Prime. The large leak of documents apparently downloaded from the company's network or a related company: 1539 image files (JPG and PDF), totaling 606 megabytes.

By Paulo Brito in CISO Advisor

The 3 most dangerous types of malware for Android

Find out what the most dangerous types of malware are for Android and understand how they can target devices with this operating system.

By Lukas Stefanko in We Live Security

Hackers now hide malware in Windows event logs

Security researchers 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 work with scripts

Researchers created a tool that detects flaws in the way Microsoft Word and Adobe Acrobat process JavaScript, and it proved to be so effective that it found 134 bugs. 59 of them considered worthy of correction by suppliers.

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, the action of blocking pornography and violence websites helps to avoid exposing children to explicit content on home networks and children's schools, for example, or wasting employees' time on corporate networks.

By Aléx de Oliveira on 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, called Nerbian RAT, has several functions, with emphasis on the possibility of escaping detection by security solutions. Its distribution is based on false communications from the World Health Organization.

By Dácio Castelo Branco on Canaltech

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

Corporate PC users around the world had, on average, a 15.1% chance of encountering a threat last year, while in Brazil this percentage was 21%, which puts the country in 39th place among 77 nations included in security firm Avast's 2020 Global PC Risk Report.

In CISO Advisor