Mfa-Bypass on CuraSec

Mirage2FA PhaaS Bypasses M365 MFA, 4,500 US/EU Firms Targeted

Wed, 26 Aug 2026 11:42:13 +0000

Engineer — Plan: AiTM phishing that defeats standard MFA is a config problem, not a patch problem — audit your Entra ID Conditional Access policies and prioritize migrating M365 users to phishing-resistant MFA (FIDO2/passkeys) this quarter, as TOTP and SMS are insufficient against this class of attack.
SOC/IR — Act: This campaign is active and broadly targeting US enterprises via M365; hunt for AiTM indicators in Entra ID sign-in logs now — flag token issuance from unexpected IPs, session establishment followed by unusual API activity, and impossible-travel events from the same session cookie.
Leader — Act: With 4,500 organizations targeted and ~48% of targeted addresses potentially compromised, confirm with your team this week that phishing-resistant MFA is enforced for M365 and assess whether your domain appeared in ANY.RUN’s targeting data; this is board-question territory given the scale.

Tue, 11 Aug 2026 11:54:43 +0000

Engineer — Plan: If you’re deploying or have deployed cloud-synced passkeys, evaluate migrating to hardware-bound (device-local) passkeys where possible; the research shows synced passkey material can be exfiltrated by malware and Windows-issued signed auth tokens can be replayed — audit your passkey configuration to prefer non-synced, phishing-resistant authenticators.
SOC/IR — Learn: These attacks require malware already present on the endpoint, making detection of credential-theft behaviors (auth token exfiltration, suspicious cloud-sync API calls) the relevant angle — no published IOCs or ATT&CK mappings yet, but worth revisiting passkey-related telemetry if new technique details emerge.
Leader — Learn: Passkey rollouts sold internally as phishing-proof may need a qualification: device-bound variants maintain that property but cloud-synced ones carry residual risk if endpoints are compromised — useful context for board decks or vendor questionnaire responses that reference passkey adoption.

Wed, 05 Aug 2026 13:01:27 +0000

Engineer — Plan: Device code flow abuse bypasses MFA by design; audit your identity provider (Entra ID, Okta) and restrict or disable the OAuth Device Authorization Grant for users/apps that don’t require it — block or conditional-policy-gate this flow this quarter.
SOC/IR — Plan: No IOCs provided, but Greatness PhaaS commoditizing device code phishing signals growing campaign volume; build detections in Entra/Okta logs for unexpected device code authorization requests, particularly outside normal device-enrollment windows.
Leader — Learn: MFA bypass techniques are now packaged in commercial crimeware toolkits, eroding the assurance value of standard MFA — useful context for risk register updates and for evaluating phishing-resistant auth (FIDO2/passkeys) as a strategic control.

Wed, 22 Jul 2026 12:46:13 +0000

Engineer — Learn: Kratos used adversary-in-the-middle techniques to steal M365 session tokens and bypass MFA — a reminder that TOTP/push-based MFA is insufficient against phishing; engineers should evaluate phishing-resistant MFA (FIDO2/passkeys) for privileged M365 accounts.
SOC/IR — Learn: No IOCs or detection specifics are provided, so no immediate hunt is actionable; the takedown does validate that AiTM session-token theft against M365 was widespread, which reinforces monitoring for anomalous token reuse and impossible-travel sign-ins if not already covered.
Leader — Learn: The scale of Kratos confirms that MFA bypass via phishing is not theoretical — useful evidence when making the case for phishing-resistant MFA investment or reviewing identity risk with the board; no immediate action required given the infrastructure has been seized.