mirror of
https://github.com/stablyai/orca.git
synced 2026-09-30 00:03:15 +00:00
Orca Worker
620c531971
MDE incident D scored Orca for suspicious memory activity: the vendored `@vscode/windows-process-tree` recovered every process's command line by opening it with `PROCESS_QUERY_INFORMATION | PROCESS_VM_READ` and chaining three `ReadProcessMemory` calls through the PEB and `RTL_USER_PROCESS_PARAMETERS`. On a 750ms/2s cadence over the whole table that is the credential-dumping primitive, whatever the intent. Windows 8.1 added `NtQueryInformationProcess`'s `ProcessCommandLineInformation` class (60), which returns the same string as a kernel-built `UNICODE_STRING` under `PROCESS_QUERY_LIMITED_INFORMATION` alone. Electron's floor is Windows 10, so every supported OS has it. The PEB reader stays behind a process-wide latch that only `STATUS_INVALID_INFO_CLASS`/`NOT_SUPPORTED`/`NOT_IMPLEMENTED` can set; a pid that merely denied a handle does not re-arm it, because `PROCESS_QUERY_INFORMATION` implicitly grants the limited right and so cannot be obtained where the weaker open already failed. The same hunk drops `PROCESS_VM_READ` from `GetProcessMemoryUsage` and `GetCpuUsage`, which acquired it and never read an address space. Measured on Windows 11 (514 processes), counted in-process by swapping the addon's import table entries for counting stubs, per CommandLine scan: `ReadProcessMemory` 1128 -> 0, desired access 0x0410 -> 0x1000, p50 12.7ms -> 9.3ms. Command lines were byte-identical on every process both readers recovered (376/376, 379/379 across runs), including a 24,068-character argv with quotes, non-ASCII and trailing whitespace, and a WOW64 target. Three processes that refused the old rights granted the new one; none went the other way.