skip navigation
skip mega-menu

What Happens After a Phishing Attack? A Real Microsoft 365 Incident Walkthrough


In this phishing attack breakdown by CloudGuard's SOC team, Conor and Jon reveal the reality behind an actual breach involving a UK law firm, exposing how hackers use four methods to regain access long after initial compromise. 


  • Discover the critical signs that indicate an attack is already underway, and how attackers remain persistent, slipping past traditional defences.
  • We break down the four key entry points hackers exploited, including mailbox rules, OAuth apps, and offline access, that can give them months of silent control.
  • You'll also learn why a hardened IR plan, layered security controls, and real-time log monitoring are your best defences against becoming the next headline. 


This breakdown is essential for security leaders, MSPs, and SMB owners who want to stop cybercriminals from turning their environment into a long-term playground. 


Follow Conor on LinkedIn

Follow Jon on LinkedIn

Follow CloudGuard on LinkedIn

Subscribe to our newsletter

Sign up here