It has been confirmed WhatsApp had been hacked remotely and surveillance software installed on phones and other devices following a vulnerability of the messaging App.
Confirming the incident was WhatsApp itself who said that the attack targeted a selected number of users but a fix was rolled out on Friday.
The attack is said to have been developed by Israel security firm NSO Group with the Facebook-owned company urging its users to update the latest version.
The messaging company privileges itself for security with the use of an end to end encrypted messaging which means that messages can only be displayed from the sender and receivers devices only.
What the attack did on WhatsApp
The attackers are said to have used the app calling function to call a target device. If the call is not received, the surveillance software deleted the record from the call logs.
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WhatsApp which is owned by Facebook said they were first to discover the hack and notified human rights group, selected security vendors and the US Department of Justice this month.