300-215 Question 40
Select 3During a forensic investigation of a suspected malware-infected system, you identify an unknown binary file. Using a hex editor such as HxD, which of the following actions can you perform to aid in identifying whether the file is malicious or tampered with?
- A
Analyze the file headers to determine the file type.
- B
Modify the file’s hex values to bypass malware detection tools.
- C
Inspect embedded strings to find potential indicators of compromise (IoCs).
- D
Compare the file’s hash values with known malware databases.
- E
Use the hex editor to execute the binary for further behavioral analysis.
Show answer and explanation
Correct answers: A, C, D
Explanation
Hex editors such as HxD are powerful tools in digital forensics and incident response (DFIR) investigations. They allow investigators to examine raw binary data, analyze file headers to determine the file type, and inspect embedded strings to identify potential IoCs. Additionally, comparing hash values of the file against known malware databases can help determine its legitimacy. However, modifying file data for malicious purposes or attempting to execute files using a hex editor are not valid or ethical forensic practices.
- A. Correct.
Analyzing the file headers is a key step in identifying the file type, as many file types have unique magic numbers or headers that can be recognized in a hex editor.
- B. Incorrect.
Modifying the file’s hex values to bypass detection tools is unethical and not a valid forensic practice. It is not a recommended action during an investigation.
- C. Correct.
Inspecting embedded strings using a hex editor can reveal valuable information such as URLs, IP addresses, or commands that could indicate malicious behavior.
- D. Correct.
Comparing the file’s hash values with known malware databases is a valid technique to determine if the file matches known malicious signatures and is an essential part of the investigation process.
- E. Incorrect.
Executing the binary using a hex editor is not possible. Hex editors are designed for viewing and editing data, not running executables.