windows verified high v1.0.0

TPwSav.sys

A driver associated with Toshiba laptops power saving functionality allows arbitary one byte reading and writing mapped physical addresses. Blackpoint Cyber's SOC observed this driver being used as part of a custom EDRSandblast malware to blind EDR prior to Qilin ransomware deployment.

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sc.exe create TPwSav.sys binPath=C:\windows\temp\TPwSav.sys type=kernel && sc.exe start TPwSav.sys
sc.exe create TPwSav.sys binPath=C:\windows\temp\TPwSav.sys type=kernel && sc.exe start TPwSav.sys

Sandbox: execFile · Timeout: 30s

Capabilities

security.privilegeescalation.kernel-exploit

Documentation

examples:

  • description: "Load the kernel driver" command: "sc.exe create TPwSav.sys binPath=C:\\windows\\temp\\TPwSav.sys type=kernel && sc.exe start TPwSav.sys"
  • description: "Exploit the driver for privilege escalation" command: "Exploit.exe --driver TPwSav.sys"

TPwSav.sys

A driver associated with Toshiba laptops power saving functionality allows arbitary one byte reading and writing mapped physical addresses. Blackpoint Cyber's SOC observed this driver being used as part of a custom EDRSandblast malware to blind EDR prior to Qilin ransomware deployment.

Use Case: Elevate privileges, Blind EDR

Required Privileges: kernel

MITRE ATT&CK: T1068

References