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Ransomware attacks on Windows Server environments encrypt critical Active Directory files, causing dysfunction without stopping services. This research highlights the impact of malware on domain services, enhancing cyber situational awareness for organizations.

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Area of Science:

  • Cybersecurity
  • Malware Analysis
  • Network Security

Background:

  • Ransomware is a growing cyber threat, highly profitable and targeting organizations for ransom payments.
  • Organizations are prime targets due to the high cost of downtime and likelihood of paying ransoms.
  • Limited research exists on ransomware's specific impact on Windows Server environments, especially Active Directory.

Purpose of the Study:

  • To investigate the effects of ransomware on Windows Server domain services.
  • To enhance cyber situational awareness for organizations using these environments.
  • To analyze how crypto-ransomware variants interact with critical server processes.

Main Methods:

  • Dynamic analysis of three distinct ransomware variants (WannaCry, TeslaCrypt, Jigsaw).
  • Testing ransomware against multiple Windows Server domain services.
  • Observing the impact on service processes and associated files.

Main Results:

  • None of the tested ransomware variants terminated Windows Server domain service processes.
  • All tested ransomware variants left the domain services technically untouched.
  • Ransomware encryption of service-related files rendered the operational services dysfunctional.

Conclusions:

  • Ransomware poses a significant threat to Windows Server environments by disrupting critical domain services through file encryption.
  • Organizations must be aware that even if services appear operational, their functionality can be compromised.
  • Further research is needed to develop effective countermeasures against ransomware targeting Active Directory and similar services.