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Rackspace has accomplished its forensic investigation into the Dec. 2 ransomware assault that took down its Hosted Exchange Email service and introduced that it’s going to discontinue that providing and transition it to cloud-based Microsoft 365.
The firm stated it has no plans to rebuild the hosted Exchange server setting, which has been down because the assault, and that it already had been on monitor emigrate to 365 earlier than the ransomware incident.
Rackspace had determined to not apply Microsoft’s ProxyNotShell patch to its Exchange Servers amid considerations over stories that the software program replace prompted “authentication errors” that the corporate feared may take down its servers. Instead, it caught with Microsoft’s really useful mitigations for the vulnerabilities to thwart a ProxyNotShell assault.
That technique fell aside, because the Play ransomware group was capable of bypass Microsoft’s mitigations with a brand new exploit abusing the CVE-2022-41080 vulnerability that breached Rackspace’s Hosted Exchange methods. “Microsoft disclosed CVE-2022-41080 as a privilege escalation vulnerability and didn’t embody notes for being a part of a Remote Code Execution chain that was exploitable,” Rackspace famous in a submit in the present day.
Play Stole Data from 27 Rackspace Customers
According to the managed cloud internet hosting companies firm, the attackers grabbed the Personal Storage Tables (PSTs) of 27 of its round 30,000 Hosted Exchange clients, however there is no such thing as a proof the Play hackers ever seen or distributed the pilfered data. “Customers who weren’t contacted immediately by the Rackspace crew could be assured that their PST knowledge was not accessed by the menace actor,” the corporate stated.
“As a reminder, no different Rackspace merchandise, platforms, options, or companies had been affected or skilled downtime attributable to this incident,” Rackspace asserted.
Meanwhile, the e-mail knowledge restoration efforts stay underway for its Hosted Exchange clients. “As of in the present day, greater than half of impacted clients have some or all of their knowledge out there to them for obtain. However, lower than 5% of these clients have really downloaded the mailboxes now we have made out there. This signifies to us that lots of our clients have knowledge backed up domestically, archived, or in any other case don’t want the historic knowledge,” Rackspace stated. The firm additionally will provide an on-demand choice for purchasers who wish to obtain their knowledge.
Rackspace stated it is contacting clients for which it has recovered greater than half of their mailboxes; their recovered knowledge is accessible through its buyer portal. “To test in case your historic electronic mail knowledge is accessible, please comply with Step 2 on our Data Recovery Resources web page (https://www.rackspace.com/hosted-exchange-incident-data-recovery-resources) and see in case your mailbox is able to obtain,” the corporate stated in its submit, which offers extra sources as properly.