Start with the relationships that carry authority: who can approve transfers, direct employees, access travel plans or introduce new advisers. Those access points are often managed separately, even when they ultimately affect the same principal.
A cyber review remains important, but it is not sufficient. The wider picture includes financial controls, travel, household arrangements, personal devices and the external firms trusted with sensitive information.
Why do family offices attract attackers?
A single family office may provide access to investment portfolios, transactions, advisers, family relationships and connected businesses. Some of that information is held in office systems; some sits with individuals who do not consider themselves part of the security function.
Ownership disclosures, philanthropy, public appointments, art holdings and commercial announcements can make a family easier to map. Attackers may combine those records with information from staff profiles, travel and social media to identify a plausible approach.
The concern is not that every public disclosure creates a direct threat. It is that information which appears harmless individually can acquire significance when assembled into one profile.
Where does the exposure actually sit?
Payments and instructions. A family office regularly engages lawyers, accountants, banks and investment counterparties. Criminals exploit familiar relationships and transaction timing to request fraudulent transfers or changes to account details.
Trusted third parties. An adviser with legitimate access may become a route into sensitive communications if their own systems or accounts are compromised.
Principals and relatives. Personal devices, public appearances and social media may reveal more than corporate security teams see. Staff and family members may handle information about residences, travel and holdings without a shared protocol.
The FBI's guidance on business email compromise describes how apparently legitimate requests can be manufactured using spoofed domains, stolen email threads or compromised accounts. This is especially relevant where transactions depend on trust and a small number of familiar people.
Why can individual security controls fail?
A successful penetration test is evidence about the systems tested, not proof that a family office cannot be deceived through a vendor or a personal account. A background check offers information at a point in time; it does not eliminate future insider risk. A secure residence does not prevent public information from revealing periods of absence.
The more important question is whether someone can explain how those exposures interact. If responsibility is distributed across a technology vendor, property manager, chief financial officer and executive assistant, gaps can persist between otherwise competent providers.
What should a family office review first?
Begin with the family's particular threat profile: sectors, jurisdictions, visibility, counterparties and the assets that would make it attractive to a hostile actor.
Map who can see and approve sensitive payments, where travel and household information is held, which external parties have access and how suspicious instructions are verified. Then rank improvements by actual risk reduction and practicality.
This follows the broader principle of tailored, prioritized risk management in the NIST Cybersecurity Framework. Not every family needs the same tools or the same spending. Each needs a defensible view of its own exposure.
Our Family Offices & Principals and Risk & Security pages explain where intelligence led assessment can assist.