During an incident response, a security analyst needs to ensure that a copy of a potentially compromised server's hard drive is acquired for analysis. Which of the following is the BEST method to ensure that the evidence is admissible in court?
Implementing remote mirroring to another server and capturing the replication data
Taking photographs of the server and its connections for documentation
Copying files from the server to an external hard drive directly
Creating a bit-for-bit image of the original drive using a write blocker
Creating a bit-for-bit image of the original drive using a write blocker is the best practice to ensure data integrity and non-repudiation, as the write blocker prevents any write operations to the original evidence which could lead to claims of evidence tampering. Simply copying files may not capture hidden or system files and could alter metadata. Remote mirroring could introduce changes to the data during transmission and is not forensically sound for evidence acquisition. Photographs do not capture the data in a manner suitable for analysis or court admissibility.
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What is a bit-for-bit image and why is it important in incident response?
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What is a write blocker, and how does it help in maintaining evidence integrity?
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What are the risks of simply copying files from a compromised server?