Contact us: info@tenendo.com
The Hidden Blind Spots in Your Security Stack
Even mature organisations with expensive security tools face critical detection gaps that adversaries exploit daily.
Generic Detection Rules
Vendor-provided rulesets only detect basic Active Directory attacks. They miss environment-specific threats, sophisticated lateral movement, and modern C2 frameworks.
Default EDR Configurations
Out-of-box EDR settings provide baseline protection but fail against advanced techniques like process injection, LSASS dumping, or cloud-native attacks.
Alert Overload Without Context
Your SIEM generates thousands of alerts, but SOC analysts struggle to correlate events, prioritise threats, or distinguish real attacks from noise.
No Tailored Detection Logic
Critical business assets, privileged accounts, and high-value services lack specific detection coverage. Adversaries exploit this gap first.
Untested Incident Response
Your IR playbooks look great on paper, but have never been validated against real attack scenarios in your actual environment.
Unknown Dwell Time Risk
How long would an attacker remain undetected in your network? Without testing, you’re operating on assumptions, not evidence.
Our Threat-Informed SOC Effectiveness Testing
We don’t just scan your environment—we simulate real adversaries to reveal detection gaps, then collaborate with your team to build effective, custom detection capabilities.
Realistic Threat Simulation
We execute multi-stage attack killchains using MITRE ATT&CK techniques that mirror real threat actors:
- Initial access via credential abuse and phishing techniques
- Lateral movement using WMI, PowerShell remoting, and SMB exploitation
- Privilege escalation targeting service accounts and local administrator rights
- Persistence mechanisms (scheduled tasks, WMI event subscriptions, registry modifications)
- Data exfiltration over DNS, HTTPS, and cloud storage
- Modern C2 frameworks (Cobalt Strike, Sliver, custom tools)
Comprehensive Detection Gap Analysis
We monitor how your SOC, SIEM, and EDR respond to each attack phase:
- Identify which techniques trigger alerts vs. go completely undetected
- Analyse alert quality, context, and correlation capabilities
- Map detection coverage against your threat model and critical assets
- Document EDR configuration weaknesses and telemetry gaps
- Assess SOC workflow efficiency and alert triage effectiveness
Purple Team Collaboration & Custom Rule Development
We work directly with your security team to close the gaps:
- Develop environment-specific detection rules for your tech stack
- Create custom logic for privileged account monitoring and lateral movement
- Fine-tune EDR configurations and logging settings
- Optimise SIEM correlation rules and alert thresholds
- Provide detection engineering best practices and knowledge transfer
- Collaborate with EDR vendors when needed for product improvements
Validation & Continuous Improvement
We re-test to confirm detection improvements are working:
- Execute validation attacks to verify that new detection rules trigger correctly
- Ensure alerts provide sufficient context for analyst response
- Validate SIEM integration and workflow efficiency
- Document detection maturity improvements and remaining gaps
- Provide a 30-day follow-up consultation for ongoing optimisation
Threat Hunting Detection Rules
Catalogue
The rules are organised according to the MITRE ATT&CK framework and cover detection capabilities for Windows, Linux, macOS, cloud environments, and container platforms.
Proven Results Across Every Engagement
We’ve never completed an assessment without finding critical detection gaps. Here’s what organisations typically discover:
100%
Of assessments uncover detection blind spots in “mature” environments
95%+
Attack scenarios go undetected with default EDR configurations
2%
Average detection rule trigger rate during Purple Team exercises
47
Undetected persistence mechanisms per assessment
“We thought our EDR and SIEM were protecting us. Tenendo’s testing revealed that 95% of their simulated attacks went completely undetected. They didn’t just find the problems—they helped us build custom detection rules that actually work.”
Scenario: A European financial institution with mature SOC operations, leading EDR solution, and SIEM platform wanted to validate its detection capabilities before DORA compliance deadlines.
23 Initial Access Attempts
21 Undetected
34 Lateral Movement Events
33 Undetected
47 Persistence Mechanisms
All Undetected
156 Custom Detection Rules
Developed & Deployed
Outcome: After Purple Team collaboration and custom rule development, detection coverage improved from 5% to 87% across tested killchains. The EDR vendor incorporated Tenendo’s recommendations into their product roadmap, benefiting their entire customer base.
Comprehensive Deliverables & Support
You receive actionable intelligence, not just another report to file away.
Executive Summary
Business-focused overview of detection gaps, risk exposure, and improvement roadmap for C-level stakeholders and board presentations.
Technical Assessment Report
Detailed analysis of every attack technique tested, EDR/SIEM response, detection gaps, and specific configuration recommendations.
Custom Detection Rules Catalogue
Environment-specific detection logic, SIEM queries, EDR configurations, and correlation rules ready for immediate deployment. MITRE ATT&CK mapped.
Purple Team Exercise Documentation
Complete walkthrough of attack scenarios, defensive responses, collaboration outcomes, and knowledge transfer sessions with your SOC team.
Prioritised Remediation Roadmap
Risk-ranked action plan with quick wins, medium-term improvements, and long-term strategic enhancements to your detection posture.
30-Day Follow-Up Consultation
Included support for rule tuning, false positive reduction, and validation testing after implementation. Remote or on-site options available.
Stop Guessing. Start Validating.
Book a 30-minute consultation to discuss your SOC effectiveness testing needs. No sales pitch—just an honest assessment of whether this service is right for you.