Security controls exist to break that chain.
There is no warning. No obvious signs that today is the day your firm’s client data becomes someone else’s opportunity. Just a normal Tuesday – a busy associate, a familiar name in an inbox, and a single click that sets everything in motion.
This is what that looks like.
8:47 AM – The Email
Sarah, a senior associate, opens her inbox and finds an email from a client she knows well. The subject line references a matter that has been running for three weeks. The sender address looks right. The message is brief: a document needs review, and there is a link to access it.
She is on back-to-back calls before lunch. She clicks the link, enters her credentials into what appears to be the firm's document portal, and moves on. Multi-factor authentication (MFA) was not enforced on the account. Her credentials alone were enough.
The email was not from the client. The sender address had been spoofed, and without impersonation protection or anti-phishing controls in place, nothing flagged it as suspicious. There was no external sender warning to give Sarah pause. The portal was a convincing imitation, and her credentials have now been captured.
Had MFA been active on her account, those credentials alone would not have been enough. Had the firm's payment and matter verification processes required a second confirmation channel for any action involving document access or fund movement, the attack would have stalled.
Had Sarah received regular security awareness training, the combination of urgency, a familiar name, and an unfamiliar link might have triggered a second look.
None of those controls were in place. A single click was all it took.
11:15 AM – The Compromise
Within two hours of Sarah's login, her account is accessed remotely. The attacker is not loud about it. They are looking for patterns: which matters are active, who the partners are communicating with, and what financial instructions have recently been exchanged.
Sarah's account has access to the firm's matter files, client records, and practice management platform. She was granted that access 18 months ago for a secondment that ended. Nobody removed it.
The attacker has time, and the firm has given them the space to use it.
2:30 PM – The Spread
By early afternoon, the attacker has identified a property transaction due for completion the following week. Client funds are involved. A draft wire instruction is sitting in a thread.
A second email is sent from Sarah's compromised account to the client, requesting confirmation of updated banking details. It reads exactly like Sarah writes. It references the correct matter and the correct amount.
The client, receiving what appears to be a routine message from a lawyer they trust, responds. No one has picked up the phone. No one has cross-checked the new banking details against a number on file. The firm has no policy requiring out-of-band verification for changes to payment instructions, and the client has never been told to expect one. An email was enough.
That single gap, the absence of a rule that any change to banking details must be confirmed by a separate phone call to a known number, is where the fraud becomes possible. Every other control in the chain could have held. This one did not.
4:10 PM – The Realization
The client calls the firm directly. Something felt off about the follow-up email. They wanted to confirm before acting.
The call reaches Sarah, who has no knowledge of the message. She escalates immediately. Within minutes, it is clear the account has been accessed and that a fraudulent wire instruction has been sent.
An industry survey found that nearly 40% of legal clients said they would fire or consider firing a law firm that experienced a security breach – and this firm is now inside that number, live and unfolding.
There is no documented incident response plan. There is no clear owner for the situation. The managing partner, IT contractor, and office manager are all making calls in parallel, none of them with a defined role.
6:20 PM – The Questions
By the end of the day, the firm understands what happened in outline. What it does not know is substantially more:
- Which other accounts or matters may have been accessed during the window
- Whether any client data was copied or exfiltrated before the breach was identified
- When the Law Society of Ontario must be notified and by whom
- Whether PIPEDA reporting obligations are triggered, and what the timeframe is
- What the firm is required to tell the affected client, and when
The IT contractor has isolated the compromised account, but without access logs or a forensic trail, the firm has no way of knowing what was accessed or for how long. The client on the property transaction is waiting for an update. The firm does not have one to give.
What This Firm Was Missing
This did not require reckless behaviour. It required a handful of ordinary gaps lining up.
- Email authentication protocols were not configured, making spoofing straightforward
- Access permissions were never reviewed after the secondment ended
- Staff had not received phishing simulation training covering targeted, contextual attacks
- No incident response plan existed to direct the first critical hours
- There was no named security oversight function to catch any of this before it was tested
None of these are exotic. They are basic safeguards for Toronto law firms.
A firm with those controls in place would likely have stopped this at the first step.
DMARC configuration would have made spoofing the firm's own domain significantly harder and is one part of a broader email authentication stack worth having in place.
Regular access reviews would have removed Sarah's broad permissions when her secondment ended. Realistic phishing training would have made the credential prompt suspicious rather than routine.
And if a breach did occur despite those controls, a documented response plan would have meant that roles were clear, notifications were made on time, and the client received an update before the day was out.
The outcome is not inevitable. The controls exist. The question is whether they are in place before the day comes.
Not Sure Where Your Firm Stands?
Not sure how your firm would hold up? Download our Law Firm Cyber Security Checklist and see where your gaps are. [link to checklist]
Prefer to talk it through? Book a strategy call with our team.
FAQs
- What should a Toronto law firm do immediately after a cyber security breach? Isolate the affected accounts, then assess what was compromised. Notification obligations under the Law Society of Ontario and PIPEDA may be triggered, and the applicable timeframes should be assessed quickly with legal and incident response support. A documented incident response plan is what keeps those steps on track when the pressure is on.
- How do phishing attacks target law firms?
The most effective attacks against law firms are researched. Attackers identify active matters, client names, and how your people communicate before making contact – which makes the messages far harder to spot than a generic scam email. Regular phishing simulations that reflect this kind of targeted attempt are one of the most practical controls a firm can have in place. - What cyber security compliance requirements apply to Toronto law firms?
The Law Society of Ontario’s competence and confidentiality obligations extend to how client data is protected, and PIPEDA applies to the handling of personal information. There is no single mandated framework, but a breach will be assessed against whatever controls the firm had in place at the time. - What is an incident response plan, and does my law firm need one?
It defines who does what, in what order, and when notifications go out after a security incident. Without one, the first hour of a breach is spent on coordination rather than containment. Every Toronto law firm handling client data should have one – and it should be tested regularly, not filed away.
Consider Choosing Manawa as Your IT Partner
Manawa can help you navigate this complex landscape. Whether it’s staff augmentation or managed services, Manawa’s experienced team is ready to tailor a solution that fits your business.
|
Check out our managed IT services across the GTA: |
Consider reaching out to Manawa for a free consultation to diagnose your specific needs. Your path to optimized IT starts here.