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Storm-0940 uses AI tool ARTEX in ConnectWise supply chain attack on M365

2026-10-22 15:52 UTC · Microsoft Security Blog · read the source ↗ #supply-chain#nation-state#m365
  • Engineer — Act: ConnectWise supply chain compromise explicitly triggers Act; audit your M365 tenant for unauthorized OAuth app registrations and anomalous credential grants, and verify ConnectWise installation integrity against known-good baselines.
  • SOC/IR — Act: Active nation-state campaign with ATT&CK-mappable TTPs (supply chain compromise, application credential abuse); hunt for anomalous OAuth app registrations and unexpected delegated permission grants in M365 unified audit logs going back at least 90 days, and pull the full Microsoft post for Sentinel/Defender detection queries.
  • Leader — Act: Nation-state supply chain compromise via a widely-used MSP tool affecting M365 tenants qualifies as a systemic event; verify whether ConnectWise is in your environment directly or via a managed service provider, request a formal exposure attestation from ConnectWise, and brief leadership given the nation-state attribution before they see it in the news.
This entry was curated and judged by AI (Claude) with automated enrichment (CISA KEV / EPSS / public PoC). Verify against the original source before acting. Found a bad verdict? Report it — confirmed errors go to the corrections log.