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MSSP Incident Response Checklist for Synthetic Voice and Video Scams

By Freedom251 Team · · 10 min read

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A convincing executive voice note, live video call, or cloned employee voice must be handled as a potential social-engineering and account-compromise incident—not as a media-authentication puzzle. Stop the requested payment, credential change, or data disclosure; verify the person through a previously trusted channel; preserve the original evidence; contain financial and identity exposure; then investigate and report. A detector score, caller ID, familiar face, watermark, or realistic conversation is never sufficient on its own.

What an MSSP should do first

When synthetic voice or video is used to request money, credentials, access, payroll changes, sensitive files, or an urgent exception, the managed security service provider (MSSP) should open an incident immediately. Assign an incident lead, pause the requested action, and record who received the message, when it arrived, which channel carried it, and exactly what the sender wanted.

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The FBI has warned that attackers use highly convincing voice, video, and email messages to enable fraud against individuals and businesses. Synthetic content itself is not automatically illegal, but the FBI Internet Crime Complaint Center (IC3) documents its use in fraud and extortion, including cloned relatives, account holders, executives, law-enforcement figures, and other authority figures. Treat the media as one element of a broader attack path. The real questions are whether an identity was impersonated, whether someone acted on the request, and whether credentials, sessions, funds, or data were exposed.

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Why this is an incident-response problem

Authenticity cannot be decided from appearance alone

AI-generated material can look and sound natural, and genuine recordings can contain compression, pauses, poor lighting, or transmission glitches. The FBI lists possible clues such as visual warping, distorted decibels, unnatural pauses, choppy sentences, unusual inflections, abnormal phrasing, incongruent background noise, unnatural movement, and poor lighting or audio quality. Those clues are useful for triage, not proof. The absence of artifacts does not authenticate a message.

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The requested action determines the risk

A fake celebrity video posted publicly may require a communications and abuse response. A cloned chief financial officer asking for a wire transfer, or a fake help-desk call requesting an MFA reset, can create immediate financial and identity compromise. Severity should therefore reflect both the action requested and the potential blast radius:

Scenario Suggested severity Immediate priority
Wire, crypto, payroll, beneficiary, or other money movement Critical Stop or recall the transaction and contact the bank or payment provider
Password, MFA code, token, privileged access, or mailbox change High Prevent disclosure, suspend affected access, and revoke sessions or tokens
Executive, public-figure, law-enforcement, or customer-service impersonation High; critical if it drives a transaction Verify through an independent channel and check for related contacts
Customer-facing fake media, harassment, or misinformation Moderate to high, with a parallel communications track Preserve the source, protect victims, and coordinate platform and legal action
Suspicious media with no requested action Monitor or moderate Capture context and assess whether it is part of a wider campaign

Prepare before a deepfake incident

Set approval and verification rules

Write a rule that no single voice call, video meeting, email, or chat can authorize a high-impact action. Require dual approval and out-of-band confirmation for wire and crypto transfers, payroll changes, new beneficiaries, password resets, MFA changes, and temporary privileged access. The second approver must use a separate, pre-established channel; forwarding the suspicious message to another person for a quick “does this look right?” is not independent verification.

Pre-register contact methods for executives, payment approvers, banks, vendors, outside counsel, insurers, law enforcement, platforms, and crisis-communications leads. Store a known telephone number in the corporate directory, not in an email signature that an attacker could alter. Define a fresh-meeting procedure, such as starting a video call from a trusted calendar entry rather than joining a link supplied in an unexpected message.

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Make MFA non-negotiable

Enforce phishing-resistant or strong multifactor authentication where practical, and document that no responder, executive, or help-desk agent may disable MFA because a caller or video participant asks. The FBI specifically advises never providing an MFA code to an unsolicited contact. Build an escalation path for legitimate recovery so employees are not tempted to bypass controls under pressure.

Design evidence handling

Your playbook should specify how to capture the original file or recording, message export, full headers, URLs, phone numbers, platform and account identifiers, timestamps with time zone, transaction records, authentication logs, and analyst notes. Calculate a hash where the tooling supports it, restrict access to the evidence store, and record every transfer or analysis step. Preserve the original before blocking, deleting, reporting, or taking down content. Keep a working copy for analysis and retain the untouched source for investigators.

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Exercise realistic scenarios

Run tabletop and technical exercises involving a cloned executive voice, a fake live executive video, an urgent vendor-payment request, and a help-desk call seeking an MFA reset. Measure time to detect, time to verify, time to contain, evidence completeness, and funds at risk. Include executives, finance, identity administrators, legal, privacy, communications, and the MSSP so the procedure works across organizational boundaries.

Triage a reported voice or video scam

  1. Freeze the action. Tell the recipient not to transfer money, open links, download files, reveal a password or code, change an account, or continue the conversation while verification is pending.
  2. Record the report. Capture the reporter, discovery time, delivery channel, sender details, requested action, people who saw it, and anything already done.
  3. Preserve source and context. Export the message or conversation, save the original audio or video, capture headers and URLs, and note the surrounding thread. Do not rely on a screen recording when the platform can provide an original export.
  4. Document observable indicators. Note pauses, lag, lip-sync mismatch, lighting or shadow errors, unusual phrasing, distorted features, background-noise changes, new telephone numbers, spoofed addresses, unfamiliar domains, and pressure to act quickly.
  5. Assign severity. Escalate immediately when the request involves money, privileged access, credentials, MFA, payroll, customers, or a public-facing identity.

These observations are clues only. The FBI cautions that AI-generated content can be difficult to identify, so a clean-looking clip must still be treated as untrusted until the person is independently confirmed.

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Verify identity through a channel the attacker did not provide

Verification is the control most likely to stop a realistic deepfake. Use a telephone number already stored in the corporate directory, a known vendor record, a fresh meeting created from a trusted calendar, or a pre-agreed secret phrase. Never use the number, link, QR code, address, or meeting invitation supplied by the suspicious message as the sole verification path.

  1. Tell the requester that the action is paused pending verification; do not disclose which fraud indicators you noticed.
  2. Contact the purported person through the pre-registered method. If the person is unavailable, contact their delegate or a second authorized approver rather than accepting a substitute channel.
  3. Ask the independent contact to confirm the exact action, amount, destination account, timing, and any unusual exception. A vague “yes, that sounds like me” is insufficient.
  4. Require a second authorized person to approve sensitive actions on a separate channel, with both approvals logged.
  5. If the independent check fails or cannot be completed, reject the request and escalate as an incident.

A secret family phrase can help with personal emergency calls, while business teams should use documented call-back procedures and dual control. Familiar caller ID, a recognizable face, a convincing accent, or a detector result can support suspicion but cannot replace this process.

Contain financial, identity, and session exposure

When money may have moved

Ask the bank, payment provider, card issuer, or cryptocurrency exchange to place a hold or recall immediately. Provide transaction identifiers, beneficiary details, timestamps, and the suspected impersonation channel. Contacting the institution quickly matters even when the transfer appears complete. Preserve the original instructions and any approval records for the fraud team and law enforcement.

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When credentials or MFA may be exposed

Suspend or step-up authenticate the affected account through a trusted administrative path. Revoke active sessions, refresh tokens, API keys, and temporary grants; reset credentials; review mailbox forwarding and delegated access; and check for new MFA devices or recovery methods. If a SIM swap or phone-number takeover is possible, involve the carrier through a verified account contact and use alternate recovery methods.

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When malware or data theft is possible

Isolate a device only after collecting volatile evidence if your response procedures require it, then inspect endpoint, browser, cloud, identity-provider, and network logs. Block malicious domains, URLs, sender accounts, telephone numbers, and file hashes after evidence capture. Do not delete the source account or conversation before recording its identifiers and obtaining any platform data that may be lost.

Check the likely target set

Search for the same campaign against executives, payment approvers, family contacts, vendors, customers, shared mailboxes, and recently changed beneficiaries. Synthetic-media fraud often combines several channels, so a blocked number may be followed by email, messaging, or a new video account.

Investigate and scope the incident

Build a single timeline

Place first contact, replies, calls, approvals, authentication events, transfers, account changes, discovery, containment, and reporting on one timeline with time zone and source for each entry. This helps distinguish a standalone social-engineering attempt from an intrusion that began earlier.

Correlate the right logs

Correlate identity-provider, email, telephony, messaging, endpoint, cloud, payment, and collaboration logs. Look for impossible travel, new devices, token use after a password reset, mailbox rules, unusual forwarding, SIM changes, unfamiliar OAuth grants, and access from infrastructure tied to the sender. Determine whether the synthetic media was the entire attack or merely the final step after credential theft, mailbox compromise, malware, session theft, or data exfiltration.

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Map identities and infrastructure

List every recipient, repost, related domain, wallet address, beneficiary account, sender account, telephone number, and impersonated identity. Preserve exports, hashes, analyst decisions, and chain-of-custody records with access controls. Keep a distinction between facts observed in logs and hypotheses about who generated the media.

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Communicate and report

Use the severity matrix to notify the client incident lead, legal counsel, privacy officer, fraud team, communications owner, executive sponsor, and insurer. Legal and privacy teams should decide whether contractual notices, regulator notifications, employee notices, or customer communications are required in the relevant jurisdictions. Record the decision, rationale, deadline, and owner even when the conclusion is that no notification is required.

Report suspected criminal activity to the FBI Internet Crime Complaint Center (IC3) or a local FBI field office. Use CISA reporting channels when the incident affects critical infrastructure or when its guidance and coordination are appropriate. Include original files, headers, identifiers, timeline, transaction information, and a concise explanation of the requested action. Coordinate with banks, payment providers, platforms, hosting companies, and affected partners.

Tell employees and customers only what they need to act: stop, use the known contact method, never send money or codes, and report the message. Keep public statements factual, avoid repeating the fake clip or linking to it, and retain a copy for investigators before requesting removal.

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Recover and strengthen controls

  1. Restore accounts and payment processes only after independent identity verification and review of authentication and transaction logs.
  2. Reconcile transfers, monitor for follow-on fraud, and notify affected parties under applicable obligations.
  3. Measure time to detect, verify, contain, and recover; record funds at risk, evidence gaps, and every control failure.
  4. Update contact registries, dual-approval rules, MFA enforcement, executive-media exposure, detections, training, and escalation paths.
  5. Retest the same social-engineering path and confirm that staff can stop it without relying on one detector or watermark.

NIST Special Publication 800-61 Revision 3, published in 2025, is the current incident-response publication aligned with the Cybersecurity Framework 2.0 and supersedes Revision 2. Its purpose is to reduce the number and impact of incidents and improve response and recovery efficiency. Use it as the organizing framework for preparation, detection, response, and recovery rather than creating a deepfake-only process.

What detectors, watermarks, and provenance can—and cannot—do

The FTC describes three intervention points for voice-cloning harms: upstream prevention and authentication, real-time detection and monitoring, and post-use evaluation. An MSSP should evaluate each separately. A detector may flag a suspicious file, but it may not stop a payment, identify the real account owner, or reveal whether credentials were stolen. Watermarks can be altered or removed, and false positives can harm legitimate speakers. NIST’s synthetic-content transparency work supports provenance and authenticity controls as part of a broader technical approach, not as a single verdict engine.

Control or response path Independence of verification Speed False-positive risk Can it stop payment or takeover alone? Evidence value
Known-number call-back or trusted directory contact High when the contact registry is protected Minutes Low, if the human contact is correct Yes, when enforced before action Creates an approval record and confirmed identity
Dual approval on separate channels High Minutes to hours Low to moderate Yes, if no bypass exists Strong transaction and authorization trail
Automated deepfake detector None by itself Seconds to minutes Can be significant; performance varies by media and conditions No Useful triage signal; retain input and result
Watermark or provenance signal Variable; depends on issuer and integrity Seconds Unknown when metadata is missing or altered No Helpful context, not proof
Post-use forensic analysis Does not prevent the action Hours to days Depends on evidence quality and method No, but may support recovery and prosecution Potentially strong when originals and logs are preserved

The practical decision is simple: use detection to prioritize attention, but use independent human verification and dual control to authorize money, credentials, access, and sensitive data.

Common failure modes

“The caller ID matches, so it is safe.”

Caller ID, display names, email addresses, and profile photos can be spoofed or copied. Call the stored number or initiate a new meeting yourself.

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“The video is live, so it cannot be fake.”

Real-time synthetic video and audio can appear in chats with alleged executives or officials. Apply the same pause-and-verify rule to live calls as to recordings.

“The detector found no manipulation.”

No detector can establish identity or intent in every format. Treat a clean result as one input and continue with out-of-band verification.

“We should delete it immediately.”

Deletion can destroy metadata, account identifiers, and context needed for a bank, platform, insurer, or investigator. Preserve first, then block or remove when safe and lawful.

“The employee only revealed an MFA code.”

An MFA code can enable account takeover even when no password was disclosed. Revoke sessions, reset credentials, inspect recovery settings, and search for follow-on access.

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Bottom line for an MSSP

Make synthetic voice and video a trigger for the full incident-response process. Pause the requested action, verify independently, preserve originals and context, contain funds and identities, scope related contacts and systems, report through the FBI IC3 and appropriate CISA routes, and improve dual-control, MFA, logging, training, and tested playbooks. The strongest defense is a trusted process that remains safe when the media looks completely real.

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