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Active incident? Call our 24/7 line now (average pick-up time: under 60 seconds)
24/7 CREST-Accredited DFIR

Cyber Incident Response

Cyber incident response is the structured process an organisation follows to identify, contain, investigate, and recover from a cybersecurity breach. Precursor Security provides 24/7 CREST-accredited incident response for retainer clients, covering ransomware, data exfiltration, business email compromise, and APT containment, including ICO breach notification support. IR retainers start from £8,500/year, and emergency ad-hoc response is available without signing a long-term contract.

Our analysts are on the line right now. If your organisation is under attack, call our 24/7 incident line. Within minutes, a senior DFIR analyst begins remote triage. We have closed hundreds of incidents across ransomware, APT, and BEC. CREST-accredited. UK-based. No minimum spend to mobilise. Reports support cyber insurance applications and renewals.

CREST Accredited
CrowdStrike Partner
UK Based
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3,000+ Assessments DeliveredTriple-CREST Accredited24/7 UK SOC in NewcastleReports Accepted by Insurers & RegulatorsEst. 2018
Incident Response

Every Hour Without Containment
Costs You £50,000.

Ad-hoc incident response means cold-starting a relationship during the worst day of your career. Retainer clients get analysts who already know their Active Directory, their backup posture, and their regulatory obligations.

The fastest recorded eCrime breakout time in 2025 was 27 seconds (CrowdStrike 2026 Global Threat Report). When the call comes at 3am, the analyst who picks up already knows your environment.

Get a Retainer Quote
Ad-Hoc Incident Response
2-4 hours before response begins (legal, scoping, payment)
No guaranteed SLAs: competing with other incidents
Responders start from zero knowledge of your environment
£2,500/day (20-30% premium over retainer rates)
No pre-established insurance or legal relationships
Precursor IR Retainer
Immediate mobilisation (we already know your environment)
Pre-scoped: AD, cloud, backup posture, regulatory obligations
Preferential rates (£1,800/day, 20-30% saving)
Cyber insurance integration and tabletop exercise included
What Happens When You Call

The First 60 Minutes

No hold music. No ticket queues. Here is exactly what happens after you call our 24/7 incident line.

0:00

You call our 24/7 incident line

0:05

Senior analyst on the phone, triage begins

0:30

Containment actions begin

1:00

Initial breach assessment checkpoint. CEO briefing notes ready.

24/7
Remote triage available
From your first call
Named
Incident commander on call
Retained clients
72 hours
GDPR breach notification
We handle ICO reporting
Engagement Pipeline

Incident Response Process

From initial emergency call to full recovery. Our structured process ensures rapid containment, thorough investigation, and complete eradication.

Step 01

Emergency Contact and Triage

Call our 24/7 incident line or contact us via the portal. Within minutes, a senior analyst begins triage, assessing the scope, severity, and immediate containment priorities.

Step 02

Containment and Forensic Scoping

We deploy remote containment tooling, isolate affected systems, and begin forensic evidence collection. We scope the full investigation based on the threat landscape and affected assets.

Step 03

Investigation and Root Cause

Full forensic analysis across endpoints, identity, network, and cloud. We reconstruct the attack chain, identify the initial access vector, and determine the extent of data compromise.

Step 04

Eradication and Recovery

Threat actors are removed, persistence mechanisms eradicated, and systems rebuilt to a secure baseline. We provide a full post-incident report with remediation recommendations and lessons learned.

Cyber Security Incident Response Services

Incident Response Capabilities

A breach in progress is not a project. It is a crisis. Our analysts have responded to hundreds of incidents across financial services, healthcare, legal, and government. Every finding is documented and translated into language your board can act on.

Swift IT Recovery and Data Restoration

Rapid recovery of enterprise IT systems and restoration of business-critical data. We minimise downtime and get your organisation operational as quickly as possible.

Advanced Persistent Threat Containment

Containment of APTs in complex IT environments. Our analysts isolate threat actors, eradicate persistence mechanisms, and secure your environment against re-entry.

UK Regulatory and GDPR Advice

Expert guidance on ICO notification requirements, GDPR obligations, and regulatory reporting timelines. We help you meet legal obligations while managing reputational risk.

Digital Forensics UK CREST Team

Court-admissible forensic analysis across endpoints, servers, and cloud environments. We reconstruct the full attack timeline to establish root cause and data exposure scope.

Incident Communications and Press Releases

Support with internal and external communications, stakeholder briefings, and press releases. We help you control the narrative during the most critical hours.

Threat Actor Negotiation and Sanction Checks

When required, we conduct threat actor negotiation with full OFAC and UK sanction screening.

Methodology

How Precursor Incident
Response Works

Precursor cyber incident response combines rapid containment, forensic investigation, and expert remediation, powered by analysts who have responded to hundreds of major cyber incidents across every sector.

Containment

Rapid Triage and Containment

Within hours of engagement, our analysts assess the scope of compromise, isolate affected systems, and deploy containment measures to halt lateral movement and data exfiltration. Speed is everything during a live breach.

Forensics

Digital Forensics and Evidence Preservation

We conduct forensic imaging and analysis across endpoints, servers, and cloud environments. Evidence is preserved supporting regulatory investigations, insurance claims, and potential legal proceedings.

Root Cause

Root Cause Analysis

Our team reconstructs the full attack timeline: initial access vector, privilege escalation, lateral movement, and data exposure. Every finding is documented so you understand exactly what happened and can prevent recurrence.

Remediation

Remediation and Hardening

We eradicate persistence mechanisms, rebuild compromised systems, and implement immediate hardening measures. Credential resets, patching, network segmentation, and logging uplift are standard.

Closed Loop

Offensive Intelligence Feedback Loop

Findings from every incident feed directly into our CREST-accredited penetration testing and MDR detection rules. Organisations using Precursor for both offensive and defensive security receive a continuously strengthening posture.

Incident Response Retainer

IR Retainer from £8,500/year

The retainer is how your responders know your environment before the breach. At inception, we scope your critical systems, capture your identity architecture, and document your backup posture. When the call comes at 3am, the analyst who picks up already knows your AD structure, your cloud footprint, and your regulatory obligations.

What the Retainer Includes

Pre-agreed access to CREST-accredited incident responders who already know your environment.

24/7 Availability

Available via telephone, portal, and email around the clock. Named incident commander for retained clients.

Pre-Scoped Response

We scope your organisation at inception. When the call comes, we already know your AD structure, cloud footprint, and regulatory obligations.

Cyber Insurance Integration

Our retainer integrates with your policy to protect indemnity and lower premiums.

Incident Response Planning

Consultancy credits to create or improve your IR plan, validated with a tabletop exercise.

20-30% Discounted Ad-Hoc Rates

Retainer clients receive preferential pricing, making the retainer self-funding after a single engagement.

From £8,500/year for organisations up to 500 seats.View retainer tiers
IR Services

Incident Response Services

Specialist incident response capabilities available as standalone engagements or as part of your retainer. Not sure whether MDR, a SOC, or a SIEM is the right fit before you ever need incident response? See our MDR vs SOC vs SIEM comparison guide.

Closed-Loop Security

Post-Incident
Vulnerability Assessment.

After containing an incident, our offensive team assesses the vulnerabilities that enabled the breach. We then test your hardened environment to confirm the gaps are definitively closed. Findings feed back into MDR detection rules for continuous monitoring.

Confirm the gaps are closed
Full Catalogue

Explore Our Full Service Catalogue

Incident response is one component of a comprehensive security programme. Explore our full range of offensive and defensive security services.

Related security terms

Plain-English definitions of the concepts behind this service, from our security glossary.

24/7 Emergency Response

Active incident? Call us now.

If your organisation is under attack, call our 24/7 incident line. A senior DFIR analyst will be on the phone within minutes. For retainer enquiries, book a scoping call.

CREST Accredited
From £8,500/year

Incident Response: Common Questions

Pricing, retainers, response times, and how our DFIR process works.