Threat Hunting Services UK | Beyond Dashboard Clean
Threat hunting is the proactive, hypothesis-driven search for cyber threats that have evaded automated detection, using human expert analysis of endpoint telemetry, network logs, and cloud audit data to find Advanced Persistent Threats, insider threats, and stealth malware. Unlike SOC monitoring (which responds to alerts), threat hunting actively seeks threats that have never triggered an alert. Precursor Security delivers MITRE ATT&CK-based threat hunting engagements from £4,500, and continuous managed threat hunting from £5,000 per month.
Your EDR shows no alerts. Your SIEM dashboard is green. That is not the same as clean. 82% of malicious detections in 2025 were completely malware-free: attackers using legitimate tools, living-off-the-land techniques, and stolen credentials designed to stay below alert thresholds. Our CREST-accredited threat hunters find what automated tools are built to miss.
What if your EDR dashboard is lying?
An attacker used PowerShell and built-in Windows admin tools to move laterally through your environment over the last six weeks.
This is why we Threat Hunt.
Our hunters don't wait for alerts. We work backwards through your endpoint telemetry, looking for execution patterns that fit attacker methodology, not malware signatures.
--framework MITRE_ATT&CK
--technique T1059.001
--process "powershell.exe"
An attacker accessed a UK financial services firm using valid employee credentials obtained weeks earlier. They authenticated normally, accessed internal file shares, and began staging client data underT1078, Valid Accounts.
The EDR logged every action as legitimate. No alert was generated. Our hunters identified the compromise by correlating authentication timing, access sequencing, and data movement patterns across 47 days of endpoint telemetry.
Threat Hunting Methodology: Hypothesis-Driven
Automated tools detect known-bad. Threat hunters detect unknown-bad: the attacker who has specifically chosen techniques that stay below alert thresholds.
Hypothesis-Driven Hunting
Developing threat hypotheses based on MITRE ATT&CK techniques, threat intelligence, and your industry risk profile. Our hunters proactively search for indicators of techniques like credential dumping (T1003), lateral movement (T1021), and data staging. Knowing the technique catalogue is different from knowing which hypotheses to prioritise for your specific environment.
Advanced Persistent Threat (APT) Detection
Hunting for signs of APT activity that evades automated detection: living-off-the-land techniques, fileless malware, stealth persistence mechanisms, and long-term reconnaissance. Advanced attackers use PowerShell (T1059), built-in Windows admin tools, and LOLBin techniques specifically designed to stay below alert thresholds. No signatures. Only human pattern recognition finds them.
Insider Threat Detection
Identifying malicious insider activity through anomalous data access patterns, unusual file transfers, after-hours access to sensitive systems, and evidence of intellectual property theft or sabotage.
Log Analysis and Correlation
Deep analysis of SIEM logs, endpoint telemetry, network flows, and cloud audit logs. We correlate events across multiple sources to identify attack chains that automated rules miss, including boot/logon autostart execution (T1547) and valid accounts abuse (T1078).
Threat Intelligence Integration
Applying latest threat intelligence (IOCs, TTPs, threat actor profiles) to hunt for specific adversary behaviours in your environment. We pivot from known indicators to discover unknown compromises. Our MITRE ATT&CK threat hunting framework starts with your industry's threat actor profile, not a generic ATT&CK coverage checklist.
MITRE ATT&CK Threat Hunting Framework
Our hunt hypotheses map to specific ATT&CK techniques prevalent in UK threat intelligence for your sector, not a generic coverage checklist.
OS Credential Dumping
LSASS memory extraction, credential theft from authentication stores. One of the most common post-compromise techniques in UK financial services breaches.
Remote Services
Abuse of RDP, SMB, WMI, and SSH for lateral movement. Often disguised as legitimate administrator activity with no alert generated.
Command and Scripting Interpreter
LOLBin attacks via PowerShell, WMI, and built-in Windows admin tools. No signatures to detect. Only human pattern recognition finds them.
Boot or Logon Autostart Execution
Registry run keys, startup folders, and scheduled tasks used to maintain persistence across reboots. Often dormant for weeks before activation.
Valid Accounts
Attackers operating under legitimate user credentials. Your dashboard shows authorised access. No anomaly score. Only behavioural hunting finds it.
Tactic Coverage
From Hypothesis to Threat Eradication
The four phases of a threat hunting engagement.
Scoping and Hypothesis Development
Understanding your threat landscape and developing hunt hypotheses based on MITRE ATT&CK techniques relevant to your industry. We identify the most likely attack vectors and adversary behaviours targeting organisations like yours, mapped to the specific threat actor profiles active in your sector.
Data Collection and Preparation
Ingesting data from endpoints (EDR logs), SIEM, network sensors, cloud platforms (AWS CloudTrail, Azure Activity Logs), and identity providers. We prepare datasets for hunting using big data analytics platforms.
Hunt Execution
Executing hunt queries across endpoints, networks, and cloud environments. Our hunters manually investigate suspicious patterns, anomalies, and evidence of attacker techniques that automated tools flag as benign or ignore entirely.
Findings and Remediation
Documenting discovered threats with detailed attack timelines, indicators of compromise (IOCs), and remediation recommendations. We work with your incident response team to eradicate threats and prevent recurrence.
Validate Detections with Red Team Operations
Hunt findings show where your detection coverage fails. Red Team operations confirm whether those gaps can be exploited by a determined adversary, and whether your detection rules would catch them if they were.
Managed Threat Hunting
A one-off engagement is a point-in-time photograph. The attacker moves in the Tuesday after the hunt closes. Managed threat hunting closes the gap, running alongside our 24/7 Security Operations Centre for continuous, full-estate coverage.
Managed threat hunting is available as part of our MDR service.
Explore MDRBetween monthly hunts. Ransomware pre-positioning takes 3-6 weeks. The maths is not in your favour.
Managed hunting includes weekly indicator-of-compromise sweeps, monthly hypothesis-driven hunt cycles, and on-demand response to new threat intelligence.
Hunt findings feed directly into updated SIEM detection rules and EDR policies. Your detection stack improves with every cycle.
Adjacent decisions UK buyers weigh alongside threat hunting.
Managed Detection & Response (MDR)
Continuous threat hunting as part of 24/7 managed detection and response. The operational home for hypothesis-driven hunt cycles.
Explore MDRMDR vs SOC vs SIEM vs EDR vs XDR
Understand where threat hunting sits within the broader managed security landscape and which combination your organisation needs.
See the comparisonCyber Incident Response UK
When a threat hunt surfaces an active compromise, incident response takes over. See how containment, forensics, and recovery work.
Explore IR servicesFull Services Catalogue
Comprehensive penetration testing services tailored to your environment.
Internal Testing
Post-perimeter assessments targeting Active Directory, lateral movement, privilege escalation, and segmentation validation from inside your network.
Ready to Find Out What Is Already Inside?
Book a scoping call with our threat hunting team. We will assess your data sources, recommend the right engagement type, and deliver a fixed-price quote. No obligation.
Threat Hunting: Common Questions
Pricing, methodology, managed vs engagement-based hunting, and what to expect from a hunt.
Threat hunting services typically cost between £4,500 and £15,000 depending on environment size, data sources, and hunt duration. A standard quarterly threat hunt for a mid-sized organisation (200-500 endpoints) averages £6,500 for a 5-day engagement covering endpoint telemetry, SIEM logs, and cloud audit data. Comprehensive hunts for large enterprises (1,000+ endpoints) with complex infrastructure typically cost £10,000-£15,000 per engagement. Organisations with ongoing threat hunting needs often opt for continuous managed threat hunting, delivered as a monthly service from £5,000 per month. We provide fixed-price quotes after scoping your environment and data sources.
Threat hunting is the proactive search for cyber threats hiding in your environment that have evaded automated detection tools. Unlike reactive security monitoring (waiting for alerts), threat hunting uses human expertise to hypothesise where attackers might be hiding and actively search for evidence of compromise using MITRE ATT&CK techniques, threat intelligence, and deep log analysis. The critical distinction: SOC monitoring responds to alerts; threat hunting actively seeks threats that have never triggered an alert.
Threat hunting is proactive: it searches for threats before they are known to exist. Incident response is reactive: it contains and investigates a breach after it has been detected. Threat hunting often prevents incident response. Finding a dormant compromise before it activates avoids the breach entirely. However, if a threat hunt discovers an active compromise, it transitions directly into incident response. The two disciplines are sequential, not competing. Organisations that hunt proactively spend significantly less on incident response because they catch threats earlier, before data is exfiltrated or ransomware is detonated.
Managed threat hunting is threat hunting delivered as a continuous, outsourced service rather than a periodic engagement. Instead of a one-off hunt every month (leaving a 30-day window of undetected exposure), managed threat hunting provides ongoing coverage: weekly IOC sweeps, monthly hypothesis-driven hunt cycles, and on-demand hunting triggered by new threat intelligence. Hunt findings feed directly into updated SIEM detection rules and EDR policies, improving your detection stack continuously. Precursor Security delivers continuous managed threat hunting from £5,000 per month. Standalone engagement-based hunting starts from £4,500 per engagement.
EDR and SIEM tools are signature-based and rule-driven: they only detect threats they are configured to find. Advanced attackers deliberately evade automated detection using living-off-the-land techniques (leveraging legitimate Windows admin tools), fileless malware, and slow, stealthy reconnaissance. The average dwell time before detection is 21 days. These are threats living in your environment completely undetected by automated tools. A peer organisation in your sector may show green on every dashboard while an attacker stages data for exfiltration. Threat hunting uses human intuition and hypothesis-driven analysis to find the threats that never triggered a single alert.
While we cannot guarantee findings (if your environment is genuinely clean, that is the best outcome), threat hunting typically uncovers issues in 70-80% of engagements. Common findings include: insider threat indicators (unusual data access or exfiltration patterns), dormant malware or persistence mechanisms from previous compromises, misconfigurations creating security gaps, and evidence of reconnaissance or lateral movement that did not cross alert thresholds. Even when no active threats are found, hunting validates your detection coverage and identifies blind spots in your monitoring stack.
Threat hunting is entirely passive and non-disruptive. Hunters analyse existing log data, endpoint telemetry, and network metadata without scanning, probing, or touching production systems. There is zero risk of service disruption or system impact. If we discover an active threat and recommend containment actions (such as isolating a compromised endpoint), we coordinate any response activities with your team to minimise business impact.
SOC monitoring is reactive: analysts respond to alerts generated by automated tools (SIEM, EDR). Threat hunting is proactive: hunters develop hypotheses about potential threats and actively search for evidence, uncovering attacks that never triggered alerts. SOC monitoring detects known threats; threat hunting discovers unknown threats. For cyber insurance purposes, insurers increasingly specify proactive threat hunting as a separate requirement from SOC monitoring or alert-based managed detection. If your MDR or MSSP provider describes their service as proactive monitoring, ask specifically whether they run hypothesis-driven hunt cycles against your environment and can document the hypotheses and data sources used. If they cannot, you are receiving monitoring, not hunting.
Threat hunting excels at finding: Advanced Persistent Threats (APTs) using stealth techniques, insider threats (malicious employees exfiltrating data), living-off-the-land attacks using legitimate admin tools (PowerShell, WMI, PsExec), fileless malware residing only in memory, credential abuse and lateral movement, and long-term compromises that have evaded detection for weeks or months.
Hunters analyse: EDR endpoint telemetry (process execution, network connections, file modifications) via endpoint detection and response platforms, SIEM logs aggregating security events, network traffic metadata (NetFlow, Zeek), cloud audit logs (AWS CloudTrail, Azure Activity Logs, GCP Cloud Audit), authentication logs (Azure AD, Active Directory), and threat intelligence feeds. The richness of your telemetry directly impacts hunting effectiveness.
We recommend continuous managed threat hunting for high-risk organisations (critical infrastructure, financial services, government, healthcare). For most organisations, quarterly threat hunting engagements provide good baseline coverage. Ad-hoc hunts should be triggered by: new threat intelligence indicating your industry is targeted, suspected but unconfirmed breaches, or before and after major security incidents to validate remediation completeness.
Effective threat hunting requires: EDR platform with robust telemetry (SentinelOne, CrowdStrike, Microsoft Defender), SIEM for log aggregation (Splunk, Elastic, Microsoft Sentinel), and preferably big data analytics tools for custom queries. We can work with your existing stack or recommend tooling if you lack comprehensive logging. Minimal requirement: EDR on endpoints and basic log collection from critical systems.
If we discover an active threat, we immediately transition to incident response: containing the threat (isolating compromised systems, blocking malicious IPs, revoking compromised credentials), eradicating the attacker (removing malware, closing backdoors, patching exploited vulnerabilities), and providing forensic analysis to understand the full scope of the breach including data accessed and persistence mechanisms. Incident response is included in hunt engagements at no additional cost.