You respond to a security incident by acting fast to contain it, investigating what happened, recovering from clean backups, and learning from it to prevent a repeat. Speed and a clear plan matter more than anything, because the first hour often decides how bad it gets. The best response, though, starts long before the incident, with the monitoring, backups and plan already in place.
Every firm should assume an incident could happen and be ready. Here’s the approach.
1. Contain it quickly
The first priority is to stop the spread: isolate affected machines or accounts, reset access and shut the door on the attacker. Fast containment limits the damage and buys time to investigate calmly.
2. Investigate what happened
Understanding how the incident started and what it touched is essential to clean up properly and to meet any reporting duties. Good logging and monitoring make this far quicker and more accurate.
3. Recover from clean backups
Tested, isolated backups let you restore systems and data to a known-good state rather than paying a ransom or rebuilding from scratch. This is why backups you have actually tested are so valuable.
4. Learn and strengthen
After recovery, a calm review of what happened and why turns a bad day into stronger defences. Closing the gap that let it in is what stops the same thing happening twice.
A real example: signals caught and acted on
We supported a technology firm serving financial trading firms where monitoring surfaced the early signs of trouble, such as an at-risk machine and a suspicious mailbox rule, so we could act before any real harm was done. Being ready and watching is what makes a fast, calm response possible.
For most technology and trading firms, this sits within fully managed IT at about £45 to £100 per user per month, billed per user, with the security and resilience these businesses rely on built in.
Why technology and trading firms choose First Stop IT
First Stop IT has supported businesses since 2002, including software and technology companies and firms that serve financial markets. We know the systems these teams depend on: secure VPN and remote access, source control and build pipelines, virtual dev and test environments, Microsoft 365 and Teams, and the security that banks and regulators expect, from multi-factor authentication and endpoint protection to application allowlisting and email security. We work with technology and trading firms in London and across Essex and Hertfordshire. Our credentials include:
- Cyber Essentials Certified
- IASME Cyber Assurance (Gold)
- NCSC Assured Service Provider (Cyber Advisor for Cyber Essentials)
- Microsoft Partner
- Crown Commercial Service Supplier (G-Cloud)
- Quality Principles Certified
We look after more than 2,000 endpoints across 50 companies, we’ve been named a Top 50 UK MSP for three years running, and we support organisations with 10 to 100 employees across Essex, Hertfordshire and London, including Harlow and Bishop’s Stortford.
Book a free IT and cyber security review
Would your firm be ready for an incident? Book a free IT and cyber security review with First Stop IT and we’ll make sure you are.