Cybercrime, FBI warning on the surge of Ragnar Locker activityThe cybersecurity experts: The ransomware frequently changes obfuscation techniques, uses a custom Windows XP virtual… Cybercrime, FBI warning on the surge of Ragnar Locker activity24 November 2020Francesco BussolettiCyber, Defence and Security The cybersecurity experts: The ransomware frequently changes obfuscation techniques, uses a custom Windows XP virtual machine and chooses which folders it will not encrypt.