The Centers for Medicare and Medicaid (CMS) has posted a observation on its site about a data breach at 1 of its contractors, Maximus Federal Services, Inc.�Maximus was one of hundreds of victims of a 0day attempt on MOVEit file transfer software by the clunk ransomware gang. Maximus detected unusual action on may 30 and reported the incident to CMS on June 2. CMS estimates that approximately 645,000 Medicare numbers had their information caught up in the attack. The types of personal and protected health information that may hold been acquired by the threat actors included: make Social Security number or Individual Taxpayer Identification number date of nativity mailing call phone Number, fax Number, and email speech Medicare Beneficiary Identifier (MBI) or Health indemnity take number (HICN) Drivers permission number and state identification number Medical History/Notes (including medical record/account numbers, conditions, diagnoses, dates of service, images, treatments, etc.) Healthcare Provider and Prescription information health indemnity Claims and Policy/Subscriber Information Health Benefits & enrollment Information Those whose Medicare number was involved will be issued new Medicare numbers by CMS. Maximus is also offer 2 years of credit protection monitoring and other services to those who were affected. CMS’s notice states: At this time, CMS is not aware of any reports of identicalness fraud or improper utilisation of information of people with Medicare as a direct result of this incident. However, you may want to read the following actions: contact the Experian dedicated and confidential toll-free response line at (833) 919-4749 if you have any questions. This response line is staffed with professionals familiar with this incident and the credit monitoring products available. The reaction line is available monday through Friday from 8 am 10 pm Central, or Saturday and Sunday from 10 am 7 pm Central (excluding major U.S. holidays). If you believe that your Medicare number may have been impacted, you can get more information and ask if your number can be changed by calling 1-800-MEDICARE (1-800- 633-4227). As reported on this site earlier today, Maximus estimates that 8-11 million people have been affected by the assault on them. Maximus had been listed on Clop’s site but without any data. Sometime between yesterday and earlier this morning, the itemization was removed. Thanks to Brett Callow for alerting us to this notice.