A new cyber threat named Maverick is causing alarm in Brazil, exploiting WhatsApp and its web version to steal banking and personal information. This malware spreads through malicious ZIP files that, once opened, initiate an infection compromising user security. Kaspersky reports over 62,000 blocked infection attempts in Brazil during the first ten days of October 2025. The virus is particularly dangerous due to its ability to self-replicate via WhatsApp Web, sending contaminated files to contacts and groups, thus rapidly expanding its reach.
Once installed, Maverick monitors user activity, captures screenshots, and creates fake pages to harvest financial credentials. Infection signs include device slowness, automatic message sending, and suspicious alerts. Quick action is crucial if infection is suspected: disconnect from the internet, perform a full antivirus scan, and change all passwords.
Users are advised to verify the legitimacy of files or links received, even from trusted contacts, through other channels before interaction. Installing and updating antivirus software is essential for threat detection and blocking. Awareness and digital education remain the first line of defense against such cyberattacks.
Brazil’s large user base of messaging apps and the digitalization of financial services make it a prime target for cybercriminals. The sophistication of threats like Maverick demands increased security efforts from users and tech companies alike. Collaboration between cybersecurity firms and platforms is vital for identifying new threats and developing effective countermeasures, thereby safeguarding digital infrastructure and user data.
To enhance protection, enabling two-factor authentication and being cautious with sharing sensitive information online are recommended. Keeping software updated is also crucial to patch vulnerabilities that malware could exploit.
