British ministers previously said that Russia was behind the "malicious" attack.
Kremlin spokesman Dmitry Peskov has said Russia has nothing to do with cyber attacks on Ukraine with the use of the NotPetya ransomware.
Read alsoBBC: UK blames Russia for 'malicious' NotPetya cyber attack
As UNIAN reported earlier, British ministers said the Russian military was directly behind a "malicious" cyber attack on Ukraine last summer, which later spread across Europe.