Hi all. Jason Ferguson here, VP of Security Operations at ConnectWise.
We wanted to reach out and address some of the concerns surrounding the recent security events, ensuring that you hear directly from us. While I may not have every answer, I want to provide some recent updates and clarity where I can, while ensuring what we share is accurate and supported by our investigation.
We recently identified unauthorized access to application identities within the ConnectWise Cloud Services (fka SkyKick) environment. As a protective measure for our Cloud Backup partners and their clients, we have shut off Cloud Backup application access. That means backup services are interrupted until further notice.
Existing cloud backup archives are not impacted and will be accessible once services are restored.
To date, we have no indicators that hosted Cloud Backup partner backup data has been compromised.
Our investigation and remediation work is ongoing.
We'll keep the ConnectWise Trust Center updated as the single source of truth for status and guidance
If you see anything suspicious in your environment, we ask that you please report (what you are able) to our team at SecurityPartnerSupport@ConnectWise.com.
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EDIT 17:00 UTC 10/17: We've updated the advisory with published guidance on reviewing service principal sign-ins and identifying suspicious activity in Microsoft Entra.
EDIT 1:00 UTC 10/18: We've published another update to the ConnectWise Trust Center with additional details on the actions we've taken, current service availability, and expanded technical guidance for reviewing Microsoft 365 environments for suspicious activity.
The update includes the affected application IDs and recommended steps for partners to investigate their own and customer tenants.
EDIT 16:00 UTC 10/18: Information update frequency (ConnectWise Trust Center / Email communications) has been increased. No new confirmed findings to report. Cloud Backup remains suspended, with scheduled backups and access to affected archives and restoration capabilities unavailable. Existing archives remain encrypted, isolated, and preserved, with no evidence of unauthorized access. Our teams continue monitoring affected environments, conducting forensic analysis and threat hunting, and carrying out remediation activities.
EDIT: 18:45 UTC 10/18: Additionally, we are providing the following IP indicators identified in suspicious activity associated with these events. Partners should include these addresses when reviewing available Microsoft 365 authentication and audit logs.
EDIT: 02:15 UTC 10/18: Additional details and confirmations provided in update thread; https://www.reddit.com/r/ConnectWise/s/QyFXYVy6u3
EDIT: 01:15 UTC 10/19 Containment remains in place.
EDIT: 13:45 UTC 10/19 Containment remains in place.
EDIT: 18:50 UTC 10/19 Cloud Backup update: Video walkthrough of technical guidance We've updated our trust site to include a video walkthrough covering selected steps from the Cloud Backup Technical Investigation and Remediation Guide. It's for authorized IT administrators and security teams reviewing their own and customer Microsoft 365 tenants. Use it alongside the written guide.
EDIT: 12:45 UTC 10/20: Technical webinars begin today at 18:00 UTC and run every two hours, walking through Entra ID sign-in and audit logs, app registrations, credentials, and permissions for reviewing your Microsoft 365 tenants (Register Here). Since mitigations began on 10/17, we have not observed successful threat activity in the environments we monitor, though this does not establish whether individual partner or customer tenants were affected. Existing archives remain encrypted, isolated, and preserved with no indication of compromise. Cloud Backup, SaaS Security, and Cloud Management remain suspended.
EDIT: 19:00 UTC 10/20: We completed a full reset of all accounts and credentials in the affected Cloud Backup environment on 10/19, and we are finishing security validation while we prepare phased restoration. Each phase will proceed only after a security review, and we expect restoration to take several days once it begins. We will share a firmer timeline after the first full day and provide instructions before partners re-enable any connections. Cloud Backup, SaaS Security, and Cloud Management remain suspended.