metric/system/process/helpers_windows.go

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// the Apache License, Version 2.0 (the "License"); you may
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//
//     http://www.apache.org/licenses/LICENSE-2.0
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// specific language governing permissions and limitations
// under the License.

//go:build windows

package process

import (
	"errors"
	"syscall"

	"golang.org/x/sys/windows"
	"golang.org/x/sys/windows/registry"

	"github.com/elastic/elastic-agent-libs/logp"
)

func isNonFatal(err error) bool {
	if err == nil {
		return true
	}
	return errors.Is(err, windows.ERROR_ACCESS_DENIED) ||
		errors.Is(err, syscall.EPERM) ||
		errors.Is(err, syscall.EINVAL) ||
		errors.Is(err, windows.ERROR_INVALID_PARAMETER) || errors.Is(err, NonFatalErr{})
}

func processesToIgnore() map[uint64]struct{} {
	m := make(map[uint64]struct{})
	// processesToIgnore checks if we should ignore the pid, to avoid elevated permissions

	// LSASS.exe is a process which has no useful cmdline arguments, we should ignore acessing such process to avoid triggering Windows ASR rules
	// we can query pid for LASASS.exe from registry
	key, err := registry.OpenKey(registry.LOCAL_MACHINE, "SYSTEM\\CurrentControlSet\\Control\\Lsa", registry.READ)
	if err != nil {
		logp.L().Warnw("Failed to open registry path SYSTEM\\CurrentControlSet\\Control\\Lsa", "error", err)
		return m
	}
	defer key.Close()
	lsassPid, _, err := key.GetIntegerValue("LsaPid")
	if err != nil {
		logp.L().Warnw("Failed to read pid for lsass.exe", "error", err)
		return m
	}
	m[lsassPid] = struct{}{}
	return m
}