300-220 Exam Dumps : Conducting Threat Hunting and Defending using Cisco Technologies for Cybersecurity 300-220 CBRTHD

The correct answer issmall, periodic outbound connections to a rare destination. Beaconing is a hallmark of command-and-control (C2) communication, particularly in stealthy malware campaigns.

Attackers design C2 channels to:

Minimize bandwidth usage

Blend into normal traffic

Avoid triggering threshold-based alerts

As a result, beaconing traffic often consists oflow-volume, regular intervalsconnecting to the same external destination. Cisco Secure Network Analytics is purpose-built to detect this type ofbehavioral anomalyusing NetFlow and telemetry analysis.

Option A suggests data exfiltration rather than beaconing. Option B is too broad and unspecific. Option D relates to denial-of-service or scanning activity, not C2.

This hunting technique aligns withMITRE ATT&CK – Command and Controland is explicitly covered in theCBRTHD blueprintunder network-based threat hunting. Detecting beaconing behavior forces attackers to significantly alter their communication strategy, increasing their operational cost.

Therefore,Option Cis the correct and Cisco-aligned answer.

The correct answer isdocumenting findings and updating detection logic. This represents thepost-hunt operationalization phase, which is critical for long-term security improvement.

While options A and C are necessary response actions, they address only thecurrent incident. Threat hunting’s strategic value comes from transforming discoveries intorepeatable detections, playbooks, and controls.

Professional threat hunting programs ensure that:

Successful hunts produce new SIEM rules

Detection gaps are closed

Findings are documented for future analysts

Lessons learned inform security architecture decisions

Option D continues exploration but fails to institutionalize knowledge. Without operationalizing results, organizations repeatedly rediscover the same threats.

This phase directly increases maturity in theThreat Hunting Maturity Model, shifting organizations from hero-driven hunting to scalable, resilient detection. It also moves defendersup the Pyramid of Pain, forcing adversaries to change tactics rather than indicators.

Therefore, optionBis the correct and most strategically important answer.

The correct answers areA. Service and version of the web serverandC. Technology used by the application. The error message shown in the exhibit is a classic example ofverbose error handling, which unintentionally discloses sensitive internal details about the web application stack.

First, the error page explicitly referencesApache Tomcat/6.0.16at the bottom. This directly exposes theweb server/service and its exact version, makingOption Acorrect. From an attacker’s perspective, this is valuable intelligence because it allows them to search forknown vulnerabilities, exploits, or misconfigurationsspecific to that version of Tomcat. Older versions of Tomcat, in particular, have a long history of publicly documented security flaws.

Second, the stack trace references components such as:

org.apache.jasper.compiler.*

.jsp files (e.g., /user/left.jsp)

javax.servlet.http.HttpServlet

These details clearly reveal thetechnology stack used by the application, namelyJava Server Pages (JSP)running onApache Tomcat with Apache Jasper. This confirmsOption Cas correct. Exposing application technology helps attackers tailor attacks such as deserialization exploits, JSP injection attempts, or framework-specific vulnerabilities.

Option B is incorrect because the error message doesnotstate or imply that Apache Jasper is vulnerable to path injection; it merely shows a compilation/runtime error. Option D is incorrect because the error page provides no information about theclient-side browser version—all disclosed details relate to server-side processing.

From a professional security and threat hunting perspective, verbose error messages significantlyincrease attack surface visibility. Best practices dictate that production systems should returngeneric error messagesto users while logging detailed stack traces internally. This scenario reinforces why proper error handling and information disclosure controls are critical defensive measures.

In summary, the penetration test error message exposes:

Theweb server service and version

Theapplication technology stack

Therefore, the correct answers areA and C.