Section 6A. In any proceeding before a probate court, an attachment may be made by injunction to reach shares of stock or other property which cannot be reached to be attached in a civil action in which money damages are sought, and the property so attached shall thereafter be subject to such order as justice and equity may require; and in relation to such probate proceedings said court shall have all the powers which the supreme judicial and superior courts have in relation to actions to reach and apply.