Cisco 300-215 CBRFIR Exam Questions Instant Access

Question 1

A cybersecurity analyst is examining a complex dataset of threat intelligence information from various sources. Among the data, they notice multiple instances of domain name resolution requests to suspicious domains known for hosting C2 servers. Simultaneously, the intrusion detection system logs indicate a series of network anomalies, including unusual port scans and attempts to exploit known vulnerabilities. The internal logs also reveal a sudden increase in outbound network traffic from a specific internal host to an external IP address located in a high-risk region. Which action should be prioritized by the organization?

AThreat intelligence information should be marked as false positive because unnecessary alerts impact security key performance indicators.

BFocus should be applied toward attempts of known vulnerability exploitation because the attacker might land and expand quickly.

COrganization should focus on C2 communication attempts and the sudden increase in outbound network traffic via a specific host.

DData on ports being scanned should be collected and SSL decryption on Firewall enabled to capture the potentially malicious traffic.

Answer : C

According to the CyberOps Technologies (CBRFIR) 300-215 study guide curriculum, command-and-control (C2) communication is a strong indicator that a system has already been compromised and is actively under the control of an attacker. Sudden outbound traffic to high-risk regions and resolution of known malicious domains are high-confidence signs of an active threat. Therefore, prioritizing detection and disruption of this outbound traffic is critical to prevent further damage or data exfiltration.

While monitoring vulnerability exploitation (B) and gathering port scan data (D) are also valuable, they are more preventive or forensic in nature. The most immediate threat---and therefore the top priority---is stopping active C2 communications.

Question 2

Which issue is associated with gathering evidence from virtualized environments provided by major cloud vendors?

Aincreased data transparency provided by cloud vendors

Bdifficulty ensuring the integrity of data due to multitenancy

Creduced complexity in isolating and securing evidence

Dsimplified chain of custody due to virtualization

Answer : B

Question 3

Which technique exemplifies an antiforensic technique?

Asteganalysis

Bdata replication

Cstepheorology

Dsteganography

Answer : D

Question 4

A cybersecurity analyst must identify an unknown service causing high CPU on a Windows server. What tool should be used?

AVolatility to analyze memory dumps for forensic investigation

BProcess Explorer from the Sysinternals Suite to monitor and examine active processes

CTCPdump to capture and analyze network packets

DSIFT (SANS Investigative Forensic Toolkit) for comprehensive digital forensics

Answer : B

Process Explorer is an advanced Windows-based utility that shows real-time data about running processes, CPU usage, services, DLLs, and handles. It is specifically designed for this kind of investigation and is part of the Sysinternals Suite.

Question 5

Refer to the exhibit.

Which encoding method is used to obfuscate the script?

AASCII85 encoding

BBase64 encoding

Cmetamorphic encoding

Dhex encoding

Answer : D

Question 6

An ''unknown error code'' is appearing on an ESXi host during authentication. An engineer checks the authentication logs but is unable to identify the issue. Analysis of the vCenter agent logs shows no connectivity errors. What is the next log file the engineer should check to continue troubleshooting this error?

A/var/log/syslog.log

B/var/log/vmksummary.log

C/var/log/shell.log

D/var/log/general/log

Answer : B

In VMware ESXi systems, the vmksummary.log file is responsible for capturing general system events, including uptime, reboot statistics, and key service-related issues. It serves as a valuable source for troubleshooting persistent or unexplained system behaviors.

The Cisco CyberOps study guide references log file paths used in system diagnostics and incident response, and for authentication-related issues on ESXi where standard logs don't yield insights, vmksummary.log is the recommended next source for identifying systemic service faults or anomalies.

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Question 7

An investigator notices that GRE packets are going undetected over the public network. What is occurring?

Aencryption

Btunneling

Cdecryption

Dsteganography

Answer : B

Generic Routing Encapsulation (GRE) is a tunneling protocol used to encapsulate a wide variety of network layer protocols inside point-to-point connections. If packets encapsulated with GRE are bypassing monitoring tools, it's likely due to tunneling---where payloads are hidden within another protocol. Tunneling can obscure malicious content or lateral movement in a network and is a common method used in data exfiltration.

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Cisco Conducting Forensic Analysis and Incident Response Using Cisco CyberOps Technologies 300-215 CBRFIR Exam Questions