A cyberattack at a law firm doesn’t just mean a few computers stop working.
Client files may become unavailable. Email can go down. Court documents can’t be reached. Trust funds may be at risk. Confidential client information may be exposed.
And sometimes the firm simply can’t work.
LAWPRO shared the real story of an Ontario law firm that suffered a cyberattack after attackers gained access to its network. The firm eventually disconnected its systems from the internet, reformatted computers, rebuilt its server and restored data from backup. Operations were badly affected for about two weeks, and the firm reported that it took roughly four weeks to become fully functional again.
That is the part of cybersecurity that gets missed.
Cybersecurity for law firms isn’t just about stopping hackers. It is also about making sure the firm can keep practising law when something goes wrong.
So what should an Ontario law firm actually have in place?
First, What Does “LAWPRO Compliant” Actually Mean?
There really isn’t a formal cybersecurity certification called LAWPRO compliance.
LAWPRO publishes cybersecurity, fraud prevention and risk-management guidance for Ontario lawyers. The Law Society of Ontario also addresses technology, confidentiality and security through its Rules of Professional Conduct and technology resources.
The Law Society states that lawyers should understand the benefits and risks associated with technology relevant to their practice, including the duty to protect confidential information.
So a better question is:
Does your law firm have reasonable cybersecurity controls in place that reflect LAWPRO guidance, Law Society obligations and accepted Canadian cybersecurity practices?
That can actually be measured.
Here is what we would expect to see.
1. Multi-Factor Authentication on Every Important Account
This is probably the easiest place to start.
LAWPRO specifically recommends two-factor authentication and says passwords alone no longer provide enough protection. LAWPRO suggests assessing the firm’s accounts and software and enabling 2FA wherever it is available.
For a typical Vaughan law firm, that means MFA should protect Microsoft 365 or Google Workspace, practice management software such as Clio or LEAP, online banking, remote access, VPN connections, administrator accounts, accounting systems and other applications containing sensitive client information.
But not all MFA is equal.
For higher-risk accounts, authenticator apps, security keys and newer phishing-resistant authentication methods are preferable to simple SMS text messages. The Canadian Centre for Cyber Security recommends stronger authentication methods and says SMS should generally be limited to lower-risk situations.
If someone at the firm can still access email using only a username and password, that should be fixed.
2. Proper Password Management
A lawyer should not have to remember 25 passwords.
And nobody should be keeping them in an Excel spreadsheet called passwords.xlsx.
Each person should have unique passwords for business systems, with a managed password manager available to securely store them.
The Canadian Centre for Cyber Security recommends clear password policies, avoiding password reuse and addressing the use of password managers as part of normal security practices.
Shared accounts should also be reduced wherever possible.
If three people are signing into the same account with the same password, you lose accountability. When something happens, it becomes much harder to determine who accessed what.
3. Managed Security on Every Computer and Server
Traditional antivirus is no longer enough by itself.
Every computer and server handling law firm information should have modern endpoint security that can detect suspicious behaviour, malware and ransomware.
More importantly, somebody has to be watching it.
LAWPRO’s published case study of the Ontario law firm breach specifically identified continuous monitoring of endpoints, servers, cloud services and network components as one of the security improvements implemented following the attack.
For a 10-person firm or a 50-person firm, this doesn’t mean hiring an internal security team.
It normally means using managed endpoint security or MDR — Managed Detection and Response — where trained security analysts can investigate suspicious activity instead of simply waiting for someone in the office to notice something is wrong.
4. Security Updates and Patch Management
Attackers often don’t need some brilliant new hacking technique.
Sometimes they just find old software.
Computers, servers, firewalls, VPNs, browsers and applications should be patched regularly. Devices that are no longer supported by the manufacturer should have a replacement plan.
LAWPRO’s law firm breach case specifically called out keeping web servers, firewalls and VPN applications current with security patches. The Canadian Centre for Cyber Security also includes automated patching or formal vulnerability and patch management as a baseline security control.
For a law firm, this process should be managed centrally.
It shouldn’t depend on each lawyer remembering to click “Install Update.”
5. Real Backups — Including Restore Testing
Most firms will tell us they have backups.
The better question is:
When was the last time somebody actually restored something from them?
A backup is only useful if the data can be recovered.
The Canadian Centre for Cyber Security recommends backing up essential business information, keeping backups securely stored and encrypted, maintaining off-site or offline copies where appropriate, and regularly verifying that backup and restore systems actually work.
LAWPRO’s Ontario breach example showed why this matters. The affected firm had overnight off-site backups and was able to restore file data to the day before its systems were shut down.
For a modern law firm, backups should cover more than the server.
Microsoft 365 data should also be reviewed. That includes Exchange email, OneDrive, SharePoint and Teams where those systems contain firm or client information.
A good backup plan answers two questions clearly:
How much data could we lose?
And:
How long would it take us to get the firm operating again?
Those are business questions, not IT questions.
6. Email Security and Phishing Protection
Email is still one of the easiest ways into a law firm.
A fake Microsoft login. A document supposedly sent by opposing counsel. A message that appears to come from a managing partner. A request to change banking information.
One click can be enough.
Law firms should have email filtering capable of detecting malicious attachments, suspicious links, impersonation attempts and common phishing techniques.
But technology can’t catch everything.
Staff also need to know what a suspicious message looks like and, more importantly, what to do when they receive one.
LAWPRO’s breach case recommends employee security awareness, while the Canadian Centre for Cyber Security treats cybersecurity awareness training as a baseline control for organizations.
Security training should not be one 45-minute video everybody watches once a year.
Short, regular training and phishing simulations work much better in day-to-day practice.
7. Special Controls Around Trust Accounts and Wire Transfers
This one deserves special attention.
LAWPRO reported in 2026 that a growing number of insured firms were experiencing unauthorized transfers from trust and general accounts. In one case described by LAWPRO, $1.6 million was removed through eight unauthorized transactions over three days.
Even MFA isn’t a reason to become relaxed about financial controls. LAWPRO reported that some recent frauds appeared to bypass normal bank MFA and transaction verification processes.
Firms handling trust money should have a written verification process for wire transfers and changes to payment instructions.
LAWPRO also provides a Wiring Funds Checklist and recommends using it for transactions involving wires from trust accounts.
One simple rule can prevent a very expensive mistake:
Never rely only on an email telling you that banking information has changed.
Verify it using a known, trusted method.
8. Limit Administrator Access
Everyone should not be an administrator.
Lawyers need access to their files. Accounting needs access to financial systems. IT administrators need elevated privileges.
Those are different things.
Administrative accounts should be limited, separated from normal daily-use accounts where practical, protected by MFA and monitored for unusual activity.
After the breach described by LAWPRO, the affected firm reset administrator passwords, reviewed privileged accounts, removed unnecessary accounts and implemented monitoring for suspicious administrator access.
This is basic least-privilege security.
People get access to what they need.
Not everything.
9. Encrypt Firm Data and Mobile Devices
Lawyers work everywhere now.
At home. At court. At a client’s office. On laptops. On phones.
That changes the security problem.
Firm laptops should use full-disk encryption. Mobile devices accessing firm information should have proper screen locks, encryption and remote-management capabilities where appropriate.
The Canadian Centre for Cyber Security recommends protecting sensitive information on mobile devices in an encrypted state and separating business information from personal information where possible.
A laptop forgotten in the back seat of a car shouldn’t automatically become a client confidentiality incident.
10. Continuous Security Monitoring
There is a big difference between having security software and knowing when something bad is happening.
Security systems generate alerts.
Somebody has to review them.
That may include suspicious Microsoft 365 logins, repeated failed authentication attempts, malware detections, unusual administrator activity, impossible travel alerts, ransomware behaviour or communication with known malicious systems.
Continuous monitoring was another control specifically identified following the Ontario firm breach published by LAWPRO.
For most small and mid-sized firms, 24/7 monitoring is more practical through a managed cybersecurity provider than through internal staff.
11. A Written Cybersecurity Incident Response Plan
Suppose ransomware hits the firm tonight.
Who gets called first?
Who shuts systems down?
Who contacts the firm’s IT provider?
Who contacts the cyber insurer?
Who speaks with LAWPRO?
Who determines whether clients must be notified?
Where are those phone numbers stored if Microsoft 365 and the firm’s servers aren’t available?
That should already be written down.
LAWPRO identified development of an incident response plan as one of the improvements following the breach it documented. The Canadian Centre for Cyber Security also recommends a written incident response plan identifying responsibilities, external contacts and recovery procedures.
Keep a copy somewhere that doesn’t depend on the systems you might lose during an attack.
12. Proof That the Controls Are Actually Working
This is the part we think law firms should demand from their IT provider.
Don’t settle for:
“Everything looks good.”
Ask for evidence.
A law firm’s security review should be able to show the status of MFA, endpoint protection, patching, backups, backup restore testing, phishing training, privileged accounts, firewall security, Microsoft 365 security and any unresolved vulnerabilities.
That changes cybersecurity from something the firm assumes is being done into something management can actually review.
For partners, managing lawyers and office administrators, that’s a much better position to be in.
What Should a Reasonably Protected Vaughan Law Firm Look Like?
A well-managed firm should have layers.
MFA protects identities.
Endpoint security protects computers.
Email security reduces phishing.
Patching closes known holes.
Backups provide a way back after ransomware.
Encryption protects lost devices.
Security awareness helps employees recognize attacks.
Monitoring helps catch suspicious activity early.
An incident response plan tells everyone what to do when those other controls fail.
No single product makes a law firm secure.
The layers working together do.
Cybersecurity Is Becoming Part of Running a Law Firm
The Law Society’s duty of technological competence and confidentiality obligations make cybersecurity more than an IT department issue. LAWPRO’s own cybersecurity material shows the financial, operational and professional risks firms face when their systems are compromised.
And the threats aren’t theoretical.
LAWPRO continues to publish warnings about compromised accounts, wire fraud and attacks against Ontario firms. In June 2026 it warned lawyers about unauthorized trust-account transfers, and in August 2026 it was still publishing new cybersecurity alerts.
For law firms across Toronto, Vaughan and the GTA, the question shouldn’t be whether your IT company installed antivirus.
The better question is:
If someone attacked the firm tonight, could we detect it, stop it, recover from it and prove that reasonable safeguards were already in place?
If the answer isn’t clear, there is work to do.
How Atomic Guardian Helps Vaughan Law Firms
Atomic Guardian provides managed IT services and cybersecurity for law firms in Toronto, Vaughan and across the GTA.
Our approach is built around the same practical areas discussed above: identity security, managed endpoint protection, email security, backups, restore testing, employee security training, network protection, continuous monitoring and documented cybersecurity controls.
We also believe law firms should receive evidence that these protections are working, not simply be told that they are.
If you’re not sure how your current environment compares with LAWPRO recommendations and accepted Canadian cybersecurity practices, a cybersecurity review can identify the gaps and give the firm’s partners a clear picture of what is already protected, what isn’t, and what should be addressed next.
Because when a cyberattack happens, that isn’t the time to discover what your IT provider forgot to set up.
Related industry guidance
Put this guidance into practice
Connect these recommendations to a complete technology and risk-management program. Explore Atomic Guardian’s managed cybersecurity for Vaughan law firms, including Microsoft 365, legal applications, cybersecurity, vendor coordination, backups, and strategic planning.
Atomic Guardian’s cybersecurity services can help law firms turn these priorities into an accountable operating plan.