A hack of legal services provider Stretto Inc. that resulted in the theft of Celsius Network LLC’s customer information was more extensive than previously known, affecting at least four companies in total, Foresight News reported. A Stretto lawyer said at a hearing in New York that the attack affected 104,000 Celsius creditors, whose names and other contact information were compromised, as well as three other companies for which Stretto provided bankruptcy-related administrative services. Stretto learned on April 17 that it had been targeted by a phishing attack.