fix: filter out software from parallels vm (#16520)

> Related issue: #15855

I followed a similar pattern to `sanitizeSoftware`, a function that
modifies the `Software`. I was originally going to update
`sanitizeSoftware` itself, but decided against it
1. to avoid making lots of changes to the function signature and
internals
2. because the logic this issue requires is pretty different from what
`sanitizeSoftware` is trying to do, so seemed to warrant its own
function.

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

<!-- Note that API documentation changes are now addressed by the
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- [x] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality

---------

Co-authored-by: Roberto Dip <me@roperzh.com>

changes/15855-vm-software

@@ -0,0 +1,2 @@
+- Fixes issue where software from a Parallels VM on a MacOS host would show up in Fleet as if it
+  were the host's software.

server/service/osquery_utils/queries.go

@@ -1267,6 +1267,10 @@ func directIngestSoftware(ctx context.Context, logger log.Logger, host *fleet.Ho
 
 		sanitizeSoftware(host, s, logger)
 
+		if shouldRemoveSoftware(host, s) {
+			continue
+		}
+
 		software = append(software, *s)
 
 		installedPath := strings.TrimSpace(row["installed_path"])
@@ -1394,6 +1398,16 @@ func sanitizeSoftware(h *fleet.Host, s *fleet.Software, logger log.Logger) {
 	}
 }
 
+// shouldRemoveSoftware returns whether or not we should remove the given Software item from this
+// host's software list.
+func shouldRemoveSoftware(h *fleet.Host, s *fleet.Software) bool {
+	// Parallels is a common VM software for MacOS. Parallels makes the VM's applications
+	// visible in the host as MacOS applications, which leads to confusing output (e.g. a MacOS
+	// host reporting that it has Notepad installed when this is just an app from the Windows VM
+	// under Parallels). We want to filter out those "applications" to avoid confusion.
+	return h.Platform == "darwin" && strings.HasPrefix(s.BundleIdentifier, "com.parallels.winapp")
+}
+
 func directIngestUsers(ctx context.Context, logger log.Logger, host *fleet.Host, ds fleet.Datastore, rows []map[string]string) error {
 	var users []fleet.HostUser
 	for _, row := range rows {

server/service/osquery_utils/queries_test.go

@@ -1747,3 +1747,30 @@ func TestDirectIngestWindowsProfiles(t *testing.T) {
 		}
 	}
 }
+
+func TestShouldRemoveSoftware(t *testing.T) {
+	tests := []struct {
+		name string
+		want bool
+		s    *fleet.Software
+		h    *fleet.Host
+	}{
+		{
+			name: "parallels windows software on MacOS host",
+			want: true,
+			h:    &fleet.Host{Platform: "darwin"},
+			s:    &fleet.Software{BundleIdentifier: "com.parallels.winapp.notepad", Name: "Notepad.app"},
+		},
+		{
+			name: "regular macos software",
+			want: false,
+			h:    &fleet.Host{Platform: "darwin"},
+			s:    &fleet.Software{BundleIdentifier: "com.apple.dock", Name: "Dock.app"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			require.Equal(t, tt.want, shouldRemoveSoftware(tt.h, tt.s))
+		})
+	}
+}