Act
active
Active AitM Phishing Campaign Hijacks M365 Accounts Targeting Finance
- Engineer — Plan: Active campaign bypasses MFA via session-token theft on M365 — no KEV or PoC signals, but the exposure is real. Prioritize enforcing phishing-resistant MFA (FIDO2/passkeys) for finance and payroll accounts in Entra ID conditional access policies this quarter.
- SOC/IR — Act: Widespread active campaign with clear TTPs: AitM proxy intercept, residential proxy blend-in, and finance-account targeting. Hunt M365 sign-in logs for logins from residential proxy ASNs, and sweep finance/payroll mailboxes for new unauthorized forwarding rules or OAuth app grants added since the campaign was reported.
- Leader — Plan: An active, widespread BEC-style campaign harvesting payroll and finance email warrants directing the security team to assess phishing-resistant MFA coverage for high-risk financial roles and briefing finance leadership on social-engineering risk this quarter.
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