A simple but noteworthy attack is making the rounds on popular chat service WhatsApp. It’s incredibly easy for someone to pull off—all they need is access to a single account that has you listed as a contact. And if you’re susceptible to a bit of social networking, said attacker can take over your WhatsApp account…
source https://lifehacker.com/use-2fa-to-stop-this-new-whatsapp-account-attack-1845765591