1. Download D-noise.
2. On 3ds Max go to menu bar Maxscript select Run Script and select your downloaded file to run.
3. Select all objects you want to add Noise and click "apply Noise".
4. Select the min. and max. values for seed, scale and strength random.
5. With the objects selected click "Noise Sets" to apply random values between the ones you have set. Repeat the button until you achieve the desired look.
6. "Delete Noise" button - just in case you wanna take noise modifier out.
7. Hope it helps you!