31 Aug Antivirus vs MDR: Who Is Watching When Something Gets Through?
Antivirus is still an important part of business security. It checks files and activity for signs of malicious software and can block many common threats before they cause damage.
The problem is not that antivirus has stopped working. The problem is that modern cyber attacks do not always look like a traditional computer virus.
A criminal might sign in using a genuine employee password, create a hidden email rule, download a large number of files or move between cloud accounts. None of those actions necessarily involves installing an obviously malicious file.
That creates a gap between having security software and knowing what is actually happening across the business.
What happens after an alert is generated?
Many businesses already have systems capable of producing security alerts.
The more important question is: who sees them?
An alert might arrive overnight, at the weekend or while the person responsible for IT is on holiday. It may also be one of hundreds of routine notifications, making it difficult to identify the one that requires immediate attention.
Larger organisations employ security teams to monitor this activity around the clock. Most SMEs cannot justify recruiting their own team of specialist analysts.
Managed Detection and Response, usually shortened to MDR, provides access to that capability as a managed service.
What is Managed Detection and Response?
MDR combines security technology with people who monitor, investigate and respond to suspicious activity.
Instead of simply generating an alert, an MDR service can:
- Monitor systems and accounts 24 hours a day
- Identify unusual or potentially malicious behaviour
- Investigate whether an alert represents a genuine threat
- Respond to contain an incident
- Provide clear reporting and recommendations
- Monitor for compromised business credentials
The important word is “response”.
An alert tells you that something may have happened. A response service investigates it and takes the appropriate action.
What can MDR spot that antivirus might miss?
Imagine an employee receives a convincing Microsoft 365 email and enters their details into a false sign-in page.
There may be no virus to detect. The attacker simply uses the stolen username and password to access the genuine account.
Once inside, they might:
- Read previous email conversations
- Create forwarding rules to hide replies
- Impersonate the employee
- Send altered payment details to a customer
- Download documents from OneDrive or SharePoint
- Attempt to access other systems
Each action may appear legitimate when viewed on its own. Together, they form a pattern that needs investigating.
MDR brings information from different parts of the IT environment together so analysts can see the wider picture.
Why are more SMEs considering MDR?
Small and medium-sized businesses increasingly rely on the same cloud services and online systems as much larger organisations.
They hold employee information, customer records, commercial documents and payment details. They also depend on Microsoft 365, remote access and cloud applications to keep working.
What they rarely have is someone watching those systems throughout the night.
MDR makes specialist security monitoring available without the cost of establishing an internal Security Operations Centre or recruiting an in-house team.
For an SME, that can mean:
- Faster investigation of suspicious activity
- Protection outside normal office hours
- Less pressure on internal employees
- Better visibility across cloud services and devices
- Clearer information following an incident
- Earlier action before a threat causes wider disruption
It provides enterprise-level monitoring in a form that is manageable for a smaller business.
Does MDR replace antivirus and backups?
No. Each service has a different job.
Antivirus helps prevent and block malicious software. Multifactor authentication helps protect user accounts. DNS filtering can prevent access to known dangerous websites. Backups help recover information after deletion, corruption or an attack.
MDR adds continuous monitoring, investigation and response.
Good security comes from these protections working together rather than relying on one product to solve every problem.
Which businesses should consider MDR?
MDR is particularly relevant if your business:
- Relies heavily on Microsoft 365 or cloud applications
- Holds sensitive customer, employee or financial information
- Has employees working remotely
- Operates outside standard office hours
- Does not have a dedicated cyber security team
- Needs clearer security reporting
- Would struggle to operate if systems were unavailable
It can also provide reassurance for businesses whose customers increasingly ask questions about cyber security, business continuity and data protection.
How WTS Systems delivers MDR
WTS Systems provides Managed Detection and Response through Adlumin.
The service combines technology with experienced analysts who monitor activity, investigate potential threats and respond when action is needed. It provides visibility across business accounts, cloud services, networks and devices without giving the customer another complicated dashboard to watch.
You continue running the business. The security team keeps watch in the background.
If you are unsure who currently sees your security alerts or what would happen if suspicious activity appeared at 2am, that is a good place to start.
Speak to WTS Systems and we will explain the options in plain English.