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WerFaultSecure Loading DbgCore or DbgHelp - EDR-Freeze (8a2f4b1c-3d5e-4f7a-9b2c-1e4f6d8a9c2b)

Detects WerFaultSecure.exe loading dbgcore.dll or dbghelp.dll which contains the MiniDumpWriteDump function. The MiniDumpWriteDump function creates a minidump of a process by suspending all threads in the target process to ensure a consistent memory snapshot. The EDR-Freeze technique abuses WerFaultSecure.exe running as a Protected Process Light (PPL) with WinTCB protection level to suspend EDR/AV processes. By leveraging MiniDumpWriteDump's thread suspension behavior, edr-freeze allows malicious activity to execute undetected during the suspension period.

Cluster A Galaxy A Cluster B Galaxy B Level
WerFaultSecure Loading DbgCore or DbgHelp - EDR-Freeze (8a2f4b1c-3d5e-4f7a-9b2c-1e4f6d8a9c2b) Sigma-Rules Disable or Modify Tools - T1562.001 (ac08589e-ee59-4935-8667-d845e38fe579) Attack Pattern 1
Impair Defenses - T1562 (3d333250-30e4-4a82-9edc-756c68afc529) Attack Pattern Disable or Modify Tools - T1562.001 (ac08589e-ee59-4935-8667-d845e38fe579) Attack Pattern 2