Petya / NotPetya Poses Risk to Even Patched Systems. Ransomware is potentially more devastating than WannaCry, as it does not require vulnerable, unpatched systems to spread on the local network. Because the ransomware uses existing SMB credentials to connect to the systems, even patched Windows machines are subject to infection. The malware quickly spread across Europe, affecting varied industries such as banks, government, retail, and power, among others. LogRhythm Labs has created AI Engine Rules for the latest LogRhyth Version, 7.2.5., as well as 6.3 and older.”]
Source: https://logrhythm.com/blog/detecting-petya-notpetya-ransomware/