Cyber criminals intensified attacks on WhatsApp in 2025, with a 25% increase in reports of account cloning in Brazil, according to Federal Police records. Users receive verification codes without prompting, allowing attackers to access conversations and contacts on other devices. This practice occurs mainly through social engineering, where scammers call posing as technical support to obtain sensitive data.
The application, used by more than 150 million Brazilians daily, records average losses of R$2,500 per victim, often via fraudulent Pix transfers. Authorities recommend immediate verification of active sessions to mitigate risks. Recent cases highlight the need for quick action to regain account control.
- Receive SMS with a six-digit code without registering.
- Notice messages marked as read without you opening them.
- Notice frequent disconnections from the app for no apparent reason.
- Check profile changes, such as photo or name, without your intervention.
These signs arise when hackers exploit vulnerabilities, such as stealing QR codes or spyware installed via malicious links.
Early signs of invasion
Messages sent without authorization represent an immediate warning of cloning on WhatsApp. Users report that criminals use the account to ask contacts for money, exploiting established trust. This tactic growsu 30% in 2025, according to cybersecurity reports.
Unknown devices appear in the application’s list of active sessions. Going to “Settings” and “Connected Devices” reveals connections at unusual locations or times, indicating unauthorized remote access.
Techniques used by hackers
Scammers employ phishing to steal verification codes in 2025. Fake messages from banks or WhatsApp itself request the six-digit number, sent via SMS during registration attempts. This method accounts for 45% of recorded invasions.
Spyware is installed through ZIP files disguised as official documents. When opening these attachments, the malware captures screens and keystrokes, allowing full control of the device. WhatsApp updates in 2025 added automatic detection of these programs.
Social engineering involves calls from fake operator representatives. Attackers convince victims to confirm data, facilitating the transfer of chips, known as SIM swap. Operators reported 300,000 such attempts by September.
Fraudulent QR codes appear on fake app update sites. Scanning these codes links the account to a hacker-controlled device, no password required. This practice has increased with the remote use of WhatsApp Web.
Basic protective measures
Turn on two-step verification on WhatsApp to add a layer of security. The feature requires a six-digit PIN on new registrations, reducingo risks in 95% of cases. Configure in “Account” in the application options and associate a recovery email.
Monitor active sessions weekly to disconnect suspicious access. In 2025, the app sends biometric alerts for confirmations, requiring fingerprint or facial recognition on compatible devices. This check prevents persistent intrusions.
Update the application and operating system regularly to fix vulnerabilities. Recent versions include advanced backup encryption and real-time login notifications. Avoid downloads outside official stores, such as Google Play or App Store, to prevent malware.
Immediate actions if suspected
Disconnect all active sessions if you notice signs of cloning. Go to “Connected devices” and select “Sign out of all computers” to force reauthentication on the primary phone. This measure blocks remote access in minutes.
Reinstall WhatsApp to clean possible accumulated spyware. Make an encrypted backup beforehand, protected by a 64-digit password, introduced in 2025 updates. Change passwords for linked services, such as iCloud or Google Drive, to avoid inappropriate restores.
Contact the operator to temporarily block the chip if SIM swap is suspected. File a police report with the Civil Police, providing details of the invasion. Warn contacts via other channels about fraudulent messages sent in your name.
Scan your device with reliable antivirus to detect hidden malware. Updated tools identify 80% ofcommon threats in 2025. Monitor data and battery consumption, which increase with active spyware.
Advanced app features
“Advanced Protection Mode”, launched in 2025, requires email confirmation for critical account changes. This function blocks conversation exports and reinforces privacy in groups. Enable in settings for greater control.
End-to-end encryption protects voice and video calls from interception. In 2025, WhatsApp expanded this to backups, requiring custom keys. Users configure the feature to prevent accidental exposure.
Notifications of login attempts appear in real time, alerting you about access to new locations. Integrate biometrics to unlock the app, reducing the risk of misuse on shared devices. These tools cut invasions by 15% in the year.
Daily Habits for Safety
Avoid public Wi-Fi networks when using WhatsApp to prevent data interception. Opt for secure mobile connections in places like airports or cafes. A reliable VPN encrypts your traffic, adding extra protection in 2025.
Do not share verification codes with anyone, even in supposed support calls. Personalized scams imitate official communications to deceive users. Report suspicious accounts directly in the app for quick blocking.
Review permissions of applications installed on your cell phone periodically. Remove unnecessary access to SMS or notifications, common in trojans in disguise. This practice prevents malware from reading confirmation messages.
Keep unique passwords for each digital service, avoiding reuse with WhatsApp. Password management tools make this routine easier, strengthening your defense against mass leaks.
