Function TestComplexSequence

pkg/rules/sequence_test.go:589–681

(t *testing.T)

}

func TestComplexSequence(t *testing.T) {
	log.SetLevel(log.DebugLevel)

	c := &config.FilterConfig{Name: "Phishing dropper outbound communication"}
	f := filter.New(`
	sequence
  maxspan 1h
  	|evt.name = 'CreateProcess' and ps.name in ('firefox.exe', 'chrome.exe', 'edge.exe')| by ps.pid
		|evt.name = 'CreateFile' and file.operation = 'CREATE' and file.extension = '.exe'| by ps.pid
  	|evt.name in ('Send', 'Connect')| by ps.pid
	`, &config.Config{EventSource: config.EventSourceConfig{EnableFileIOEvents: true}, Filters: &config.Filters{}})
	require.NoError(t, f.Compile())

	ss := newSequenceState(f, c, new(ps.SnapshotterMock))

	e1 := &event.Event{
		Seq:       1,
		Type:      event.CreateProcess,
		Timestamp: time.Now(),
		Category:  event.Process,
		Name:      "CreateProcess",
		Tid:       2484,
		PID:       2243,
		PS: &pstypes.PS{
			Name: "firefox.exe",
			Exe:  "C:\\Program Files\\Firefox\\firefox.exe",
		},
		Params: event.Params{
			params.ProcessID:   {Name: params.ProcessID, Type: params.PID, Value: uint32(2243)},
			params.ProcessName: {Name: params.ProcessName, Type: params.UnicodeString, Value: "firefox.exe"},
		},
		Metadata: map[event.MetadataKey]any{"foo": "bar", "fooz": "barzz"},
	}
	require.False(t, ss.runSequence(e1))

	e2 := &event.Event{
		Seq:       2,
		Type:      event.CreateFile,
		Timestamp: time.Now().Add(time.Millisecond * 250),
		Name:      "CreateFile",
		Tid:       2484,
		PID:       2243,
		Category:  event.File,
		PS: &pstypes.PS{
			Name:    "firefox.exe",
			Exe:     "C:\\Program Files\\Mozilla Firefox\\firefox.exe",
			Cmdline: "C:\\Program Files\\Mozilla Firefox\\firefox.exe\" -contentproc --channel=\"10464.7.539748228\\1366525930\" -childID 6 -isF",
		},
		Params: event.Params{
			params.FilePath:      {Name: params.FilePath, Type: params.UnicodeString, Value: "C:\\Temp\\dropper.exe"},
			params.FileOperation: {Name: params.FileOperation, Type: params.Enum, Value: uint32(2), Enum: fs.FileCreateDispositions},
		},
		Metadata: map[event.MetadataKey]any{"foo": "bar", "fooz": "barzz"},
	}
	require.False(t, ss.runSequence(e2))

	assert.Len(t, ss.partials[0], 1)
	assert.Len(t, ss.partials[1], 1)