BACKGROUND
WhatsApp users have reportedly been receiving spam messages from a foreign phone number, informing that their WhatsApp number was selected to win a prize. Users who block the sender's number would then have their WhatsApp account suspended for a certain period of time. Once their account is recovered, previous chat conversations might be lost if the user has not backed up their chats.
IMPACT
- The user's WhatsApp account would be suspended for a certain period of time
- Loss of data if there is no backup
- This vulnerability affects previous versions of WhatsApp (For android, version before 2.20.197.15 and for iOS, version before 2.20.81)
RECOMMENDATIONS
- If you receive a suspicious message, ignore and delete it immediately
- Do not download from untrusted sources
- Update your apps and firmware to the latest version
- Scan your phone with the latest antivirus software
- Do not forward any suspicious links to others
- Perform backup regularly