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Brazil’s crypto community is facing a new and dangerous cyberattack — one that hides inside ordinary WhatsApp messages and spreads like wildfire. Security researchers warn that this campaign uses a powerful combination of a hijacking worm and a banking trojan designed to steal crypto, financial logins, and personal data.
How the Attack Works$BTC
Trustwave’s SpiderLabs team recently uncovered the operation and identified the malware behind it: Eternidade Stealer. The attack begins with a simple WhatsApp link. Once a user taps it, two things happen instantly:
1. A worm takes over the victim’s WhatsApp account, sending the malicious link to their contacts.
2. A banking trojan installs itself silently, allowing hackers to scan the device for crypto and banking information.
WhatsApp’s popularity in Brazil makes it a prime target. Researchers Nathaniel Morales, John Basmayor, and Nikita Kazymirskyi note that cybercriminals have spent the past two years perfecting their methods to exploit the platform more effectively.
A Smarter, More Targeted Worm
The worm doesn’t send the link to everyone blindly. Instead, it uses “smart filtering” to avoid business groups, brands, and other accounts unlikely to open suspicious messages. It focuses on personal contacts — the people most likely to trust the sender.
This clever approach helps the malware spread faster while keeping the attack under the radar.
Eternidade Stealer: Built for Financial Theft
Once active, the trojan scans the device for:
Banking logins$BTC
Fintech accounts
Crypto exchanges
Crypto wallets
Brazilian financial apps are specifically targeted, making local users especially vulnerable.
The malware also uses a unique command-and-control method to avoid detection. Instead of relying on a fixed server, it logs into a preconfigured Gmail account to receive updated instructions. Hackers simply send new emails to modify the malware’s behavior or direct it to a new server. If that Gmail access fails, the malware switches to a backup C2 server coded into the program.
This strategy makes shutdowns extremely difficult.
How Users Can Protect Themselves
Security experts urge Brazilian WhatsApp users — and crypto holders everywhere — to stay alert. A few simple habits can reduce the risk:
✔️ Be skeptical of any unexpected link
Even if it comes from a friend. Hackers often rely on trusted contacts to spread malware.
✔️ Verify suspicious messages through another app
A quick check on Telegram, Instagram, or SMS can prevent disaster.
✔️ Keep apps and devices updated
Old versions of WhatsApp or Android are easier targets.
✔️ Use antivirus or mobile security tools
They can flag trojans and block harmful downloads.
✔️ If hacked, act immediately
Freeze access to your:
Bank accounts
Crypto wallets
Exchanges
Tracking stolen funds early gives exchanges and authorities a better chance to intercept the transfers and freeze hacker-controlled wallets.