REvil is ransomware that locks you out but first exfiltrates your data. Then the attackers have 2 points of leverage, lock out which you may be able to circumve

REvil is ransomware that locks you out but first exfiltrates your data. Then the attackers have 2 points of leverage, lock out which you may be able to circumvent with a safe backup process but that won't protect you from the release of your data. This gives the attacker 2 nites at the cherry when trying to convince you to pay.