You Bought the Tools. Have You Tested Them?
Consider a typical mid-market enterprise security stack in 2026. A next-generation firewall from Palo Alto or Fortinet. EDR from CrowdStrike or SentinelOne. NDR from Darktrace or Vectra. A SIEM running Splunk or Microsoft Sentinel. MFA through Okta or Duo. Email security from Proofpoint or Mimecast. DNS filtering through Cisco Umbrella or Cloudflare Gateway.
That is seven categories of security tools, potentially seven different vendors, seven different management consoles and seven different teams responsible for configuration and monitoring. The annual spend on this stack easily exceeds $200,000 CAD for a mid-sized organization. For larger enterprises, it runs into the millions.
Now answer this question: when was the last time someone tested whether all of these tools work together to stop an actual attack?
Not whether each tool works individually. Whether the stack, as an integrated defense, catches a coordinated attack that moves through multiple phases and touches multiple controls.
For most organizations, the answer is never.
The Integration Gap
Each security tool in your stack was purchased to solve a specific problem. The firewall controls network access. EDR monitors endpoints. NDR watches network traffic patterns. The SIEM correlates logs. MFA verifies identity. Each tool does its job within its domain.
The problem is that real attacks do not respect domain boundaries. A real attack might start with a phishing email that bypasses email security, deliver a fileless payload that evades EDR detection, establish an encrypted command-and-control channel that the NDR cannot inspect, use stolen credentials to bypass MFA through session hijacking, move laterally through the network using legitimate protocols that the firewall allows and exfiltrate data through a cloud service that the SIEM does not monitor.
At each phase, a specific security tool had an opportunity to detect the attack. At each phase, the attack was designed to operate in the gap between what that tool monitors and what it ignores. The attack succeeds not because any single tool failed, but because no tool saw the complete picture.
This is the integration gap. Your tools work individually. They fail collectively.
Why Vendor Testing Does Not Solve This
Each vendor tests their own tool. CrowdStrike validates that Falcon detects the threats it is designed to detect. Palo Alto validates that their firewall enforces the rules it is configured to enforce. Darktrace validates that its behavioral models identify the anomalies they are tuned to identify.
No vendor tests the gaps between their tool and the other tools in your stack. That is not their responsibility. They do not have visibility into your other tools' configurations, capabilities or blind spots. They test their piece of the puzzle. Nobody tests the assembled puzzle.
This creates a dangerous assumption. Each vendor tells you their tool works. You conclude that your security works. But the whole can be weaker than the sum of its parts when the parts do not cover each other's gaps.
What Real Stack Testing Looks Like
When Sherlock Forensics conducts a security stack validation, we run a coordinated attack simulation that exercises every layer of your defense simultaneously. This is what we built ShadowTap to accomplish.
A ShadowTap engagement does not test your firewall in isolation. It does not test your EDR in isolation. It tests what happens when an attacker moves through your environment the way a real attacker would: touching every control, exploiting every gap and documenting exactly which tool saw what.
The methodology follows the real attack kill chain:
Phase 1: Perimeter testing. We probe your external perimeter to identify what the firewall allows, what the WAF catches and what reaches internal systems. This tests your first layer of defense and identifies the entry points available to an attacker.
Phase 2: Initial access simulation. Using the pathways identified in phase 1, we establish a foothold inside the network. This tests whether your email security, endpoint protection and network monitoring detect the initial compromise. We use multiple techniques simultaneously to test which ones your defenses catch and which ones slip through.
Phase 3: Lateral movement. From the initial foothold, we move through the network using the same techniques real attackers use: credential theft, protocol abuse and legitimate tool exploitation. This tests your internal segmentation, your zero trust policies, your NDR's ability to detect internal movement and your SIEM's correlation rules.
Phase 4: Objective achievement. We attempt to reach predetermined objectives: accessing sensitive data, gaining domain admin privileges, establishing persistent access or exfiltrating test data. This tests whether your complete stack, operating together, can prevent an attacker from achieving their goals.
Throughout all four phases, we document every tool interaction. Which tools detected which techniques. Which tools generated alerts that were actionable. Which tools missed techniques they should have caught. Which techniques fell in the gaps between tools where no detection existed.
The Coverage Map
The deliverable from a ShadowTap engagement is a coverage map that shows your security stack's real detection capability across the entire attack kill chain. It identifies:
- Strong coverage. Techniques that were detected and alerted by at least one tool with sufficient detail for the security team to respond
- Weak coverage. Techniques that generated some telemetry but not enough to trigger an actionable alert
- No coverage. Techniques that were not detected by any tool in the stack, representing the gaps where real attacks would succeed undetected
- Integration failures. Instances where one tool detected something but the information did not reach the SOC or the SIEM did not correlate it with other indicators
This map gives your security team a clear picture of where to invest next. Not based on vendor marketing about what their tool can do in theory, but based on empirical evidence of what your tools actually did under controlled attack conditions.
The Question Every CISO Should Ask
You have built a security stack. You pay for it every month. Your vendors tell you it works. Your compliance framework says you have the required controls in place.
But have you tested it? Not each tool individually. The whole thing. Together. Under conditions that resemble a real attack.
If the answer is no, you are operating on assumptions. And assumptions are not a security strategy. They are a liability.
ShadowTap replaces assumptions with evidence. We test without disrupting your operations. We document everything. We deliver proof.