A survey listed the FIVE MALWARES – Software created for malicious purposes – responsible for the largest number of cyber attacks in Brazil during the first three months of 2025 . The data is from ESET, a company developer of cyber security software.
The type of malware that appears most on the list is the Trojans (or Trojan horses), programs that disguise it as legitimate software to deceive the user, which ends up installing the malicious program on their system.
According to the company, this scenario reflects aThe growing sophistication of criminals aimed at the Brazilian public.
See the list:
- Spy.guildma.cu – 12.21%
- Spy.delf.Ray – 10.21%
- Vb.osk – 7.77
- Spy.guildma.cv – 4.52%
- Rozena.SL (64-bit)-4.45%
THE Trojan From the Guildma family appears twice in the ranking, being quite common in Brazil. Malware, which pretends to be a legitimate program to attract the user, has features such as screen capture, keyboard and mouse emulation, and ability to download other harmful files to the operating system.
The Delf, another Trojan financial, gets Manipulate traffic on the internet and install or remove software to compromise the machine.
Third, the VB appears, a worm – malicious program that replicates and spreads alone through a network – which is capable of Destroy the system and infiltrate image files and documents to camouflage yourself as file folders.
Last on the list, Rozena.sl is a malware of backdoor, A program that explores already known vulnerabilities of the system to allow an attacker to get access remotely.
How to avoid exposure to malware?
According to ESET Brazil, some recommended measures to avoid exposure to malware and system commitment are:
- Update your software constantly;
- Update security tools constantly;
- Avoid traps, as Download dubious origin files or click suspicious links.
This content was originally published in see the 5 programs responsible for more cyber attacks by 2025 on the CNN Brazil website.
Source: CNN Brasil
Charles Grill is a tech-savvy writer with over 3 years of experience in the field. He writes on a variety of technology-related topics and has a strong focus on the latest advancements in the industry. He is connected with several online news websites and is currently contributing to a technology-focused platform.
