300-215 Question 27
Select 3A cybersecurity analyst is tasked with identifying and classifying potential malware samples discovered on a corporate network. They decide to use YARA rules as part of their investigation. Which of the following statements correctly describe the characteristics and usage of YARA rules in this context?
- A
YARA rules use a combination of textual patterns and binary signatures for malware identification and classification.
- B
YARA rules are written using a declarative language and can include conditions such as matching multiple strings or specific file attributes.
- C
YARA rules can only be used to detect known malware but are ineffective against variants or new threats.
- D
YARA rules help document malware behaviors by including metadata fields such as author, description, and references.
- E
YARA rules automatically execute remediation actions once a match is identified.
Show answer and explanation
Correct answers: A, B, D
Explanation
YARA rules are a powerful tool for malware identification, classification, and documentation. They use patterns, signatures, and logical conditions to detect malware, including variants and new threats, when rules are well-written. The inclusion of metadata fields enhances documentation, aiding in incident response and future investigations. However, YARA does not perform remediation on its own and must be used in conjunction with other cybersecurity tools.
- A. Correct.
Correct: YARA rules leverage textual patterns, binary signatures, and logical conditions to identify and classify malware effectively.
- B. Correct.
Correct: The declarative language of YARA allows analysts to define conditions that combine patterns, strings, and file attributes to match malware.
- C. Incorrect.
Incorrect: While YARA is effective for known malware, it can also detect variants or new malware if rules are written to capture broader patterns or characteristics.
- D. Correct.
Correct: Metadata fields in YARA rules allow analysts to document critical details about the rule, such as its author, purpose, and related references.
- E. Incorrect.
Incorrect: YARA rules are used for detection and classification but do not execute remediation actions. They are typically integrated with other tools for response.