About Petya RansomwareThe initial ransomware payload has been modified and now contains these new traits:
- Petya spreads through malicious Office attachments and email. This gets through the front door and onto any target system that can be exploited via social engineering.
- Once the malware is installed, it looks for other systems to exploit using EternalBlue. This is the same vulnerability as WannaCry to exploit any system via lateral movement.
- Petya also contains malware to scrape memory and the file system for passwords and execute psexec against remote targets to propagate the infection. This will compromise hosts even if they are patched for EthernalBlue and leverage administrator credentials it discovers during its interrogation of the system.
- Encryption is at a low level using the Master File Tree tables for NTFS and overwrites the Master Boot Record (MBR) with a ransomware warning. This is why a reboot must be done instantly or the MBR can be compromised.
- Remove administrator rights from end users
- Implement application control for only trusted applications
- Perform vulnerability assessment and install security patches promptly
- Train team members on how to identify phishing emails
- Disable application (specifically MS Office) macros
Morey J. Haber, Chief Technology Officer and Chief Information Security Officer at BeyondTrust
Morey J. Haber is Chief Technology Officer and Chief Information Security Officer at BeyondTrust. He has more than 25 years of IT industry experience and has authored four Apress books: Privileged Attack Vectors (2 Editions), Asset Attack Vectors, and Identity Attack Vectors. In 2018, Bomgar acquired BeyondTrust and retained the BeyondTrust name. He originally joined BeyondTrust in 2012 as a part of the eEye Digital Security acquisition. Morey currently oversees BeyondTrust strategy for privileged access management and remote access solutions. In 2004, he joined eEye as Director of Security Engineering and was responsible for strategic business discussions and vulnerability management architectures in Fortune 500 clients. Prior to eEye, he was Development Manager for Computer Associates, Inc. (CA), responsible for new product beta cycles and named customer accounts. He began his career as Reliability and Maintainability Engineer for a government contractor building flight and training simulators. He earned a Bachelor of Science degree in Electrical Engineering from the State University of New York at Stony Brook.