Petya Ransomware Outbreak

Zscaler ThreatLabZ reports a widespread Petya-like ransomware outbreak delivered via a compromised MeDoc software update that encrypts infected systems' Master Boot Record and demands $300 in Bitcoin; the malware propagates laterally using SMB exploits (EternalBlue/MS17-010) and WMIC, impacting businesses across multiple countries. The report provides technical analysis of two DLL payloads (including a killswitch marker and scheduled reboot for payload activation), IOC hashes, sandbox detection signatures, and recommended mitigations (apply MS17-010/CVE-2017-0199 patches, disable SMBv1/WMIC, block ports 135/139/445).