Brokerages can reduce AI-enabled fraud risk by strengthening account access, authenticating email, independently verifying sensitive requests, layering identity checks, and rehearsing response and recovery. Generative AI can make familiar attacks more convincing and easier to tailor; it does not replace the underlying paths attackers use to steal credentials, impersonate people, take over accounts, or redirect money. No single detector, security key, or training program covers all of those paths.
This is U.S.-focused operational guidance for brokerage owners and leaders in operations, compliance, and information security. FINRA’s January 2025 Annual Regulatory Oversight Report describes AI-enabled schemes involving synthetic identities, account takeover, tailored business email compromise (BEC), ransomware, impersonating websites, investment-club scams, and market manipulation. FinCEN’s November 13, 2024 alert on deepfake-related fraud says financial institutions reported suspected deepfake media, particularly fraudulent identity documents used to evade verification and authentication. Those reports describe risks and observed activity; they do not establish a brokerage-specific fraud rate or prove that a particular detection product works.
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1. Strengthen sign-in for accounts that can expose customers or move money
Require multifactor authentication (MFA) for business email, file storage, remote access, administrator accounts, and staff accounts that handle sensitive information. Prioritize phishing-resistant MFA where systems support it. CISA’s business MFA guidance identifies physical security keys as its strongest listed option for small businesses and notes: “Strong passwords help, but they are no longer enough to keep accounts and systems safe when used alone.” That is guidance, not a guarantee against every account attack.
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Plan enrollment and recovery before rollout
- Check that the identity provider, applications, browsers, computers, and mobile devices in use support the chosen authentication method.
- Document who enrolls users, how a lost or damaged key is reported, who can authorize account recovery, and how backup keys are stored separately from the primary key.
- Treat SMS codes as a weaker fallback, not an equivalent replacement for phishing-resistant authentication. Restrict fallback access and review how it is used.
Owner: The identity or IT lead should own compatibility, configuration, and recovery procedures; application owners should confirm coverage for their systems. Test: Verify enrollment and sign-in for representative roles, including remote staff and administrators, and walk through a lost-key recovery without bypassing the approval process.
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2. Authenticate firm email and watch for compromised mailboxes
Configure SPF, DKIM, and DMARC for domains used to send firm email, align legitimate third-party senders, review authentication reports, and move DMARC policy toward reject as configuration permits. These mechanisms help receiving systems identify mail that fails domain authentication; they do not stop an attacker from sending a message from a genuinely compromised mailbox. CISA’s joint phishing guidance explains the role of these controls, and the FBI’s cyber-resilience guidance recommends stronger email authentication and malicious-content protections.
Cover both spoofing and legitimate-account abuse
- Inventory firm sending domains and approved vendors that send on the firm’s behalf; test configuration changes before tightening enforcement so legitimate messages are not inadvertently rejected.
- Monitor reports and investigate unexpected senders, authentication failures, unusual forwarding rules, suspicious sign-ins, and unexpected mailbox access.
- Give staff a way to report lookalike domains and suspicious messages, including messages that appear to come from a colleague or known business contact.
Owner: The email or security administrator should own domain authentication and mailbox monitoring, with business owners validating third-party senders. Test: Review authentication reports and run a controlled check that legitimate mail passes and unauthorized sending is handled according to the firm’s current policy.
3. Verify payment and sensitive-change requests through a known channel
For wire instructions, destination-account changes, sensitive account changes, and recovery-credential changes, require staff to contact the requester through a previously confirmed channel. For a wire request that arrives by email, call a number already on file—not a number or link in the message. The FTC’s small-business cybersecurity guidance gives phone confirmation of emailed wire requests as an example; the FBI likewise advises independent verification, particularly when a contact is new or a request involves money, sensitive information, links, or authentication codes.
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Make the verification rule specific
- Define which requests require a callback and which trusted contact record staff must use.
- Use dual approval for high-risk transfers, with approvers checking the request independently rather than relying on one person’s confirmation.
- Set a separate verification procedure for changes to customer contact details, transfer destinations, or account-recovery credentials; changing a contact record must not silently change the channel used to verify the same request.
- Train staff to pause when a request uses urgency, secrecy, or an unfamiliar channel to bypass normal steps.
Owner: Operations and compliance should define approval thresholds and required verification; payment staff should follow and document the procedure. Test: Use a tabletop scenario to confirm that staff can find the trusted number, reach an independent approver, and stop a request that cannot be verified.
4. Train the roles that can approve, restore, or change access
Teach staff how impersonation attempts may arrive by email, text, phone, or video, and practice the firm’s response rather than relying only on general awareness material. A familiar voice or convincing video is not independent proof of identity. The FBI’s impersonation alert warns that AI-generated voice messages and other communications can be difficult to identify as fake and recommends verification through a previously confirmed channel.
Target training to actual permissions
- Include employees with payment authority, client-service staff, helpdesk personnel, and account-opening and account-recovery teams.
- Practice requests to reset credentials, disclose authentication codes, open links or attachments, change payment details, or keep an unusual request secret.
- Make the reporting route easy to find and explain what information to preserve, such as the message or call details, without forwarding suspicious links or files broadly.
- Use exercises to check whether employees follow escalation and verification procedures, then address gaps in those procedures as well as individual mistakes.
FINRA recommends that firms consider communicating with employees and customers about heightened generative-AI risks and mitigation steps. The FTC and CISA also recommend employee training and exercises. See the FINRA report, FTC guidance, and CISA phishing guidance.
Owner: Compliance or security should coordinate role-based content with the managers responsible for affected workflows. Test: Rehearse a realistic impersonation scenario and record whether staff report it and use the required independent verification path.
5. Layer identity checks during onboarding and account recovery
FINRA and FinCEN describe synthetic identities, manipulated identity documents, and deepfakes used against account verification. Use a risk-based review that considers identity evidence alongside account signals and transaction behavior, with a human escalation route when evidence conflicts. Do not treat a selfie, a single automated liveness result, or a visual inspection as conclusive proof. FINRA’s 2025 report and FinCEN’s November 2024 alert describe the threat; they do not compare identity vendors or establish the effectiveness of particular technologies.
Make exceptions reviewable
- Define what happens when submitted documents, identity information, device or account signals, and subsequent activity do not fit together.
- Route unresolved conflicts to trained staff with authority to pause onboarding or recovery until required checks are complete.
- Keep an auditable record of the evidence reviewed, decisions made, and escalation outcome under the firm’s applicable procedures.
Owner: The teams responsible for account opening and recovery should own their procedures, with compliance and security reviewing escalation criteria. Test: Walk through a case with conflicting identity evidence and confirm staff know when to pause and whom to contact.
6. Reduce what an intruder can reach after an account is compromised
Preventive controls can fail. Least privilege, limited standing administrator access, permission reviews, secure remote access, timely patching, and controls that quarantine suspicious attachments and links can reduce the impact of a compromised account. The FBI’s cyber-resilience guidance emphasizes limiting administrator privileges, controlling exposure, and protecting email.
Focus reviews on access that could change outcomes
- Identify who can administer systems, access sensitive client information, approve transfers, or change authentication and recovery settings.
- Remove unnecessary privileges, review access when roles change, and require stronger controls for administrative and remote access.
- Ensure suspicious links and attachments can be reported and contained, and that security staff can investigate unexpected account or permission changes.
Owner: IT and security should manage technical access controls; department managers should confirm that staff permissions match their current responsibilities. Test: Review a sample of privileged and sensitive accounts against job duties and exercise the process for containing a suspected compromised account.
7. Assign response, recovery, and customer communication before an incident
Write down who can freeze a transfer or account, preserve evidence, notify compliance and security leads, contact affected customers through trusted channels, and report suspected fraud. Maintain recovery plans and test them; a written plan that staff cannot use under pressure is not an operational safeguard.
Give each action an owner and escalation route
- Specify who has authority to stop a pending transfer or restrict an account, including how that authority is reached outside normal business hours if applicable.
- Identify who preserves relevant messages, account records, and system evidence and who coordinates the investigation.
- Prepare a trusted method for contacting affected customers and a process for alerting employees if the firm is being impersonated.
- Define when suspected fraud is escalated to compliance and which reporting obligations apply to the firm; do not assume one incident workflow determines every legal requirement.
- Exercise recovery and customer-notification steps so responsible staff can find current contacts, make decisions, and document actions.
The FTC advises businesses to alert staff and notify customers if the business is being impersonated; FINRA urges firms to consider communicating risks and mitigations to employees and customers. See FTC cybersecurity guidance and the FINRA report.
How to choose a security key without treating it as a complete solution
A physical FIDO security key can be one component of phishing-resistant MFA, but suitability depends on the brokerage’s identity provider, endpoints, and recovery arrangements. Compare options against the authentication standards the firm’s systems support, device and connector or NFC requirements, secure enrollment, durability, and availability of separately stored backup keys. Confirm how lost-key recovery works before deployment. CISA names physical security keys as an option in its MFA guidance; that is not a universal product endorsement, nor does possession of a key replace email controls, payment verification, access management, or incident response.
Set a U.S. compliance review alongside the security work
This guidance is not a legal determination of any firm’s specific obligations. Brokerage firms should have qualified compliance and security personnel confirm current FINRA, SEC, FinCEN, state, and contractual requirements that apply to their business, workflows, and customers. The cited reports support a qualitative threat picture; they do not provide a brokerage-specific prevalence, loss, or control-effectiveness statistic.
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