windows verified high v1.0.0

KfeCo11X64.sys

Killer exposes COM interfaces that allow non-privileged users 1) to block network for any process 2) to manage any service in the OS. Killer is preinstalled to laptops equipped with Intel Killer NICs (e.g. Dell). Since Intel patched the vulnerability quietly, it's not clear which version is safe. Also, it is unclear which OEMs are affected. Dell is definitely in the list, but it is likely that other vendors with Killer NICs on board, such as Acer and MSI, are affected too. Some users think th...

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sc.exe create KfeCo11X64.sys binPath=C:\windows\temp\KfeCo11X64.sys type=kernel && sc.exe start KfeCo11X64.sys
sc.exe create KfeCo11X64.sys binPath=C:\windows\temp\KfeCo11X64.sys type=kernel && sc.exe start KfeCo11X64.sys

Sandbox: execFile · Timeout: 30s

Capabilities

security.privilegeescalation.kernel-exploit

Detection

TypeRule / Indicator
yara https://github.com/magicsword-io/LOLDrivers/blob/main/detections/yara/9a91d6e83b8fdec536580f6617f10dfc64eedf14ead29a6a644eb154426622ba.yara
sigma https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers.yml
sigma https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers_names.yml
sysmon https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes.xml
sysmon https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes_block.xml
yara https://github.com/magicsword-io/LOLDrivers/blob/main/detections/yara/yara-rules_vuln_drivers_strict_renamed.yar
sigma https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers.yml
sigma https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers_names.yml
sysmon https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes.xml
sysmon https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes_block.xml

Documentation

examples:

  • description: "Load the kernel driver" command: "sc.exe create KfeCo11X64.sys binPath=C:\\windows\\temp\\KfeCo11X64.sys type=kernel && sc.exe start KfeCo11X64.sys"
  • description: "Exploit the driver for privilege escalation" command: "Exploit.exe --driver KfeCo11X64.sys"

KfeCo11X64.sys

Killer exposes COM interfaces that allow non-privileged users 1) to block network for any process 2) to manage any service in the OS. Killer is preinstalled to laptops equipped with Intel Killer NICs (e.g. Dell). Since Intel patched the vulnerability quietly, it's not clear which version is safe. Also, it is unclear which OEMs are affected. Dell is definitely in the list, but it is likely that other vendors with Killer NICs on board, such as Acer and MSI, are affected too. Some users think that Killer suite is required for the NIC to work properly, so they install it even after a fresh Windows install. This version is confirmed vulnerable based on the script usage from zwclose.

Use Case: Elevate privileges

Required Privileges: kernel

MITRE ATT&CK: T1068

References