Why does ransomware exfiltrate data?

Attackers steal data before encrypting it to gain additional leverage. Even if a victim can restore from backups and avoid paying for decryption, the threat to publish or sell the stolen data — double extortion — pressures them to pay anyway. Some groups add a third layer, such as threatening customers or launching denial-of-service attacks.

Exfiltration usually happens during dwell time, before encryption. Elastio’s persistence detection surfaces the staging and exfiltration indicators that precede the encryption payload, helping identify attacker presence earlier.