Free Cisco 300-215 Exam Dumps September 2026

The string in the exhibit is a classic example of Base64 encoding. Base64 is used to encode binary data into ASCII characters, making it suitable for transmitting data over media that are designed to deal with textual data. It typically ends with one or two equal signs = (padding), which this string does. This format is commonly seen in obfuscated payloads or malware communications in the wild.

If IPS and SIEM logs do not give enough insight into a file's behavior, the next logical step is to review the Antivirus solution logs. 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.

To prevent macro-based attacks, the Cisco CyberOps study guide emphasizes the importance of limiting execution of unauthorized or unsigned macros. 'Requiring that all macros be digitally signed and limiting execution only to those that meet the required trust level is a key mitigation strategy against malicious macros.' Additionally, enabling features like Controlled Folder Access helps in protecting sensitive directories from unauthorized changes by untrusted applications, including those launched via malicious macros .

These two measures---enforcing signed macro policies and leveraging controlled folder access---directly help in mitigating the risk posed by embedded malicious macros in documents.

YARA rules are pattern-matching rules used to identify malware based on specific strings, conditions, and binary patterns. They are most effective in memory or file scans where analysts search for known indicators or unique signatures via string matching.

Correct answer: C. string matching.

Once an incident has occurred, the appropriate course of action is to engage the organization's Incident Response (IR) plan. This is a structured approach to contain, analyze, and eradicate threats before they spread across the network.

The Cisco CyberOps Associate study guide emphasizes:

''Incident response and handling are essential within an organization... The main objective of implementing an incident handling process is to reduce the impact of a cyber-attack, ensure the damages caused are assessed, and implement recovery procedures''.

In particular, the containment phase of IR is focused on isolating the threat and preventing lateral movement or further compromise.

Options such as 'root cause' or 'attack surface' are relevant at later stages of analysis and mitigation, not immediate containment. Therefore, the correct answer is C.

The root cause analysis in incident response focuses on identifying the initial trigger or root cause of the incident to understand how it started and how to prevent recurrence. In this scenario, the phishing email sent to the victim (A) is the initial trigger that led to the employee's action of clicking the malvertising link, resulting in the malware download.

The other options represent later stages in the incident response cycle, such as detection (SIEM alert, cybersecurity team's alert) or supporting evidence (email header information), but they do not address the root cause, which is the phishing email itself.

This aligns with the CyberOps Technologies (CBRFIR) 300-215 study guide, which states that identifying the initial vector of compromise is critical to the root cause analysis phase of incident response (Chapter: Incident Response Techniques, page 410-412).

The STIX data structure shows a pattern field with this entry: file:hashes.'SHA-256' = '3299f07bc0711b3587fe8a1c6bf3ee6cbcc14cb775f64b28a61d72ebcb8968d3' This value is a SHA-256 file hash, a well-known indicator of compromise (IoC) for identifying malicious files.

Therefore, the correct answer is: A . SHA256 file hash.