SIGNALInfrastructure Software·May 25, 2026, 12:45 PMSignal75Short term

FBI warns of Kali365 phishing service targeting Microsoft 365 accounts

Source: BleepingComputer

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FBI warns of Kali365 phishing service targeting Microsoft 365 accounts

The FBI is warning about the Kali365 phishing-as-a-service platform (PhaaS) that is used to hijack Microsoft 365 accounts by abusing OAuth device code authentication to steal session tokens and bypass multi-factor authentication (MFA). [...]

Why this matters
Why now

The proliferation of sophisticated phishing-as-a-service platforms coincides with widespread adoption of cloud services like Microsoft 365, making such attacks more lucrative and scalable.

Why it’s important

This development highlights the evolving tactics of cybercriminals to bypass standard security measures like MFA, necessitating more robust and adaptive defense strategies for enterprises.

What changes

The effectiveness of traditional MFA is diminishing against advanced phishing tactics, pushing organizations to explore alternative authentication methods and continuous security monitoring.

Winners
  • · Cybersecurity solutions providers
  • · Security awareness training platforms
Losers
  • · Organizations relying solely on traditional MFA
  • · Microsoft 365 users without advanced security layers
Second-order effects
Direct

Increased credential compromise leading to data breaches and insider threats.

Second

Accelerated adoption of FIDO2/passkeys and advanced anomaly detection systems.

Third

Potential for new regulatory scrutiny on cloud service providers to offer more resilient native security features.

Editorial confidence: 90 / 100 · Structural impact: 60 / 100
Original report

This signal links to a primary source. Continuum Brief monitors and indexes it as part of the live intelligence stream — we do not republish source content.

Read at BleepingComputer
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