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| Section | Objectives |
|---|---|
| Network Forensics and Traffic Analysis | - Identifying malicious traffic patterns - Packet capture and analysis - Network flow analysis using Cisco tools |
| Security Monitoring and Cisco Technologies | - Log correlation and SIEM concepts - Cisco Secure Endpoint (AMP) usage - Cisco Secure Network Analytics (Stealthwatch) |
| Endpoint and Malware Analysis | - Endpoint telemetry analysis - Use of Cisco endpoint security technologies - Malware behavior identification |
| Incident Response Process | - Preparation and readiness for security incidents - Incident identification and triage - Containment, eradication, and recovery procedures |
| Digital Forensics Fundamentals | - Forensic data acquisition techniques - Disk and memory forensics concepts - Evidence handling and chain of custody |
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NEW QUESTION # 24
An organization publishes a Microsoft Exchange Outlook Web App (OWA) server to provide access to enterprise email and deploys a web application firewall in front of it. Microsoft announces a newly discovered zero-day vulnerability that is being actively exploited. The vulnerability is triggered by a specially crafted request to an uncommonly used URL, and a patch is still being developed. Which action immediately protects the organization?
Answer: B
Explanation:
Because no patch is yet available and exploitation depends on requests to a specific, rarely used URL, the immediate compensating control is a WAF rule that blocks that path before the request reaches OWA. This preserves general email access while removing the known trigger from the exposed attack surface. Option A is the permanent remediation but cannot provide immediate protection while the vendor is still developing the update. An IDS signature that detects successful exploitation is reactive and may only alert after compromise; prevention is preferable when the malicious request pattern is known. Disabling OWA ports through a stateful firewall would protect the server but unnecessarily eliminate the entire service. Cisco describes a WAF as an inline control that inspects HTTP and HTTPS requests and blocks malicious requests before they reach the application. This also maps to CBRFIR objective 3.6 on responding to zero-day exploitation. Cisco WAF overview
NEW QUESTION # 25
A security team detected an above-average amount of inbound tcp/135 connection attempts from unidentified senders. The security team is responding based on their incident response playbook. Which two elements are part of the eradication phase for this incident? (Choose two.)
Answer: A,E
Explanation:
The eradication phase in incident response involves eliminating the root cause of the incident and strengthening defenses to prevent reoccurrence. In this case:
Intrusion Prevention System (D): Adding new rules to the IPS to detect and block malicious activity on TCP
/135 is a direct eradication step to remove the threat's entry point and prevent future attacks.
Centralized User Management (C): Hardening user accounts, removing unnecessary permissions, and applying tighter authentication/authorization measures helps eliminate the possibility that threat actors could exploit weak or mismanaged accounts to continue accessing the system.
Although anti-malware software (A) and enterprise block listing (E) are valuable, the most direct eradication steps here specifically involve managing network access (via IPS) and strengthening user controls (via centralized user management), especially when TCP/135 (MSRPC endpoint mapper) can be used to enumerate services and potentially access vulnerable endpoints remotely.
This aligns with best practices outlined in incident response frameworks (such as the NIST SP 800-61 and referenced resources), which emphasize closing the exploited entry points (in this case, TCP/135) and removing any lingering access points through user management and network control enhancements.
Reference:
CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter: Understanding the Incident Response Process, Eradication Phase, page 105-106.
External Reference: "The Core Phases of Incident Response - Remediation," Cipher blog [1].
External Reference: "Service Overview and Network Port Requirements," Microsoft documentation [2].
NEW QUESTION # 26
An engineer is investigating a ticket from the accounting department in which a user discovered an unexpected application on their workstation. Several alerts are seen from the intrusion detection system of unknown outgoing internet traffic from this workstation. The engineer also notices a degraded processing capability, which complicates the analysis process. Which two actions should the engineer take? (Choose two.)
Answer: A,D
Explanation:
When suspicious activity is detected on a workstation, immediate steps need to be taken to preserve evidence and prevent further compromise:
* Disconnecting the system from the network (C)is crucial to stop potential exfiltration of data or ongoing communications with a command-and-control server. This isolation prevents further spread or damage while preserving the state of the compromised system for further investigation.
* Taking an image of the workstation (E)is part of the forensics acquisition process. It involves creating a bit-by-bit copy of the system's disk, which preserves all evidence in its current state. This allows for thorough forensic analysis without affecting the original evidence.
These steps align with the best practices outlined in the incident response and forensics processes (as described in theCyberOps Technologies (CBRFIR) 300-215 study guide). Specifically, in theIdentification and Containmentphases of the incident response cycle, it's emphasized that isolating the system and preserving evidence through imaging are critical to ensuring both containment of the threat and successful forensic investigation.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter: Understanding the Security Incident Response Process, Identification and Containment Phases, page 102-104.
NEW QUESTION # 27
A scanner detected a malware-infected file on an endpoint that is attempting to beacon to an external site. An analyst has reviewed the IPS and SIEM logs but is unable to identify the file's behavior. Which logs should be reviewed next to evaluate this file further?
Answer: B
Explanation:
If IPS and SIEM logs do not give enough insight into a file's behavior, the next logical step is to review the Antivirus solutionlogs. These logs often provide detailed behavior analytics such as:
* File actions and access patterns
* Registry modifications
* File execution history
The Cisco CyberOps guide emphasizes AV logs as critical forensic artifacts for understanding endpoint-based infections, especially when beaconing or suspicious activity is suspected.
NEW QUESTION # 28 
Answer: A
Explanation:
This Python script uses a combination of libraries (urllib, zlib, base64, and ssl) to:
* Disable SSL certificate verification (ssl.CERT_NONE and check_hostname=False).
* Construct a custom HTTPS opener with the specified SSL context.
* Add a forged User-Agent header to mimic Internet Explorer 11.
* Connect to the URL https://23.1.4.14:8443.
* Download and execute base64-encoded and zlib-compressed content from that URL using:
exec(zlib.decompress(base64.b64decode(...).read()))
This shows a classic example of:
* Downloading payloads from a remote server (23.1.4.14:8443).
* Avoiding detection by disabling SSL verification.
* Executing the payload dynamically with exec() after decoding and decompressing.
The main goal is clearly to initiate a connection to a remote command-and-control (C2) server on port 8443 and download/execute additional code.
Hence, the correct answer is: A. Initiate a connection to 23.1.4.14 over port 8443.
NEW QUESTION # 29
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