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MalwareMay 12, 2026

‼️ Nightmare-Eclipse has just released two new GitHub repositories... Same user behind RedSun, Un...

Threat actor releases two new exploitation tools: YellowKey (BitLocker bypass) and GreenPlasma (Windows privilege

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Summary

A threat actor known as Nightmare-Eclipse, linked to previous malware campaigns RedSun, UnDefend, and BlueHammer, has released two new GitHub repositories containing exploitation tools. YellowKey targets BitLocker encryption bypass, while GreenPlasma exploits a Windows CTFMON vulnerability to achieve arbitrary privilege escalation. The public release of these tools increases their availability to other attackers and poses immediate risk to Windows systems.

Indicators of Compromise

  • malware — YellowKey
  • malware — GreenPlasma
  • malware — RedSun
  • malware — UnDefend
  • malware — BlueHammer

Entities

Nightmare-Eclipse (threat_actor)RedSun (campaign)UnDefend (campaign)BlueHammer (campaign)BitLocker (technology)Windows CTFMON (product)