Case Study

Business Email Compromise: Investigation and Containment

Professional ServicesProfessional Services Firm
The problem

Challenge

A business email compromise. Attacker access of unknown scope and duration, and no clear picture of what had been reached.

What I did

Approach

Ran the forensic investigation to establish scope and timeline. Contained the compromise and hardened the identity layer: Microsoft 365 and Entra ID configuration, access controls, and authentication policy.

Outcome

Result

Compromise contained and scope established. Identity infrastructure hardened against the attack path that was used.

Involved
Post-incident remediationIdentity hardening
The service

Work of this kind

This engagement is the sort of thing covered by post-incident remediation, and fractional CISO. The full set is on the case studies index.

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