Objective reached: payroll data accessed through a phished contractor account, with no alert raised
What we found
Credentials captured through a phishing pretext let the team sign in to the VPN as a contractor, because the VPN accepted a password alone. From there, a Kerberoasted service account with a weak password gave access to the HR file server. EDR recorded the activity, but no alert rule matched it and the security team was never notified.
Impact
An external attacker can reach payroll data and stay unnoticed.
How to fix it
Require phishing-resistant MFA for VPN access, move service accounts to long random passwords or managed service accounts, and add detections for unusual service ticket requests. Replay the chain in a purple team session to confirm the alerts fire.






