UK cyber-security firm Sophos reported detecting a spike in ransomware attacks at the end of last week from a new strain named MegaCortex.
Sophos said the ransomware appears to have been designed to target large enterprise networks as part of carefully planned targeted intrusions –in a tactic that is known as “big-game hunting.”
The modus operandi is not new and has been the preferred method of delivering ransomware for almost half a year.
MegaCortex now joins an ever-growing list of ransomware strains that cyber-criminal groups are using only in targeted attacks, rather than with spam or other mass deployment techniques. The list includes some recognizable names, such as Ryuk, Bitpaymer, Dharma, SamSam, LockerGoga, and Matrix.