WerFaultSecure Loading DbgCore or DbgHelp - EDR-Freeze

Swachchhanda Shrawan Poudel (Nextron Systems)

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.

2025-11-27 00:00:00

None

8a2f4b1c-3d5e-4f7a-9b2c-1e4f6d8a9c2b

attack.defense-evasion attack.t1562.001

Community Rule

Swachchhanda Shrawan Poudel

Merge PR #5777 from @swachchhanda000 - feat: more edrfreeze rules

2025-12-10