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Joseph Doherty 4dfc0cee65 [R3 + R4 + R8] settle protocol-level risks per Ghidra evidence

Ghidra headless decompile of `Lmx.dll`'s `aaDCT` symbol + the
`LmxProxy.dll` Fire_* event handlers (logs at
`analysis/ghidra/exports/Lmx.dll.aadct-decompile.md` and
`analysis/ghidra/exports/LmxProxy.dll.completion-status-decompile.md`)
settles **R3** and **R4** as "no static byte→status lookup table
exists":

- `Lmx.aaDCT` at `0x10178fc0` is a `SysAllocString(L"Lmx.aaDCT")` into
  a global BSTR — a logging category name, not a table.
- `MXSTATUS_PROXY` is a 4-field struct (success/category/detectedBy/
  detail), used as the marshalled COM event payload — not a static
  array of pre-mapped statuses.
- `Fire_OnDataChange` / `Fire_OnWriteComplete` / `Fire_OperationComplete` /
  `Fire_OnBufferedDataChange` (RVAs 0x15f72, 0x1611f, 0x16271, 0x163c0
  in `LmxProxy.dll`) receive ALREADY-POPULATED `MXSTATUS_PROXY[]`
  arrays — the byte-to-struct synthesis happens upstream in the
  proxy's NMX-callback ingestion code, not via a table lookup. The
  synthesis is per-event computation from operation context (engine
  ids, item handles, retry counters), not a static promotion.

R3/R4 status updated from "indefinitely deferred — no Ghidra table"
to "settled — no table exists; verbatim preservation is the canonical
answer." The .NET reference's `NmxOperationStatusMessage.TryParseInner`
+ the Rust port's `mxaccess-codec/src/operation_status.rs` already
match this canonical behaviour; no code change required.

Reopen R3/R4 only if a context-aware capture surfaces a per-byte
synthesis logic that depends on operation context — at which point
the codec would need access to the originating operation's context,
which is upstream of the bytes themselves.

**R8** marked permanently deferred — implementation already parses
NTLM AV pairs per [MS-NLMP] §2.2.2.1 (including the cross-domain
shapes `MsvAvDnsTreeName` / `MsvAvDnsComputerName` carrying the
trusted-domain DNS suffix), what's missing is the live capture, and
the live capture requires a multi-domain Windows lab not available
on this dev host. Same status pattern as F3 in `design/followups.md`.

Open evidence gaps table updated to reflect:
- Cross-domain NTLM: deferred (R8)
- Ghidra mapping table for completion-only bytes: no table exists
  (R3/R4 settled)
- Activate/Suspend transition (wire): partial (F44 + F46), live re-run
  pending (F50)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-06 06:23:05 -04:00

647 B

Raw Blame History

Lmx.dll selected decompile

FUN_10178fc0 at 10178fc0

Signature: undefined FUN_10178fc0(void)


void FUN_10178fc0(void)

{
  uint uVar1;
  void *local_10;
  undefined1 *puStack_c;
  undefined4 local_8;
  
  puStack_c = &LAB_101663ae;
  local_10 = ExceptionList;
  uVar1 = DAT_101d60b8 ^ (uint)&stack0xfffffffc;
  ExceptionList = &local_10;
  local_8 = 1;
  DAT_101d6160 = SysAllocString(L"Lmx.aaDCT");
  if (DAT_101d6160 == (BSTR)0x0) {
                    /* WARNING: Subroutine does not return */
    FUN_100013e0(0x8007000e,uVar1);
  }
  local_8 = 0xffffffff;
  _atexit(FUN_101793a0);
  ExceptionList = local_10;
  return;
}

647 B Raw Blame History

Lmx.dll selected decompile

FUN_10178fc0 at 10178fc0

647 B

Raw Blame History