Question

What is the potential weakness of the decryption code in a polymorphic program?

a.

It could theoretically be used as the signature

b.

It is encrypted using a random key

c.

It is not required to run the program

d.

It is dynamic

Posted under Reverse Engineering

Answer: (a).It could theoretically be used as the signature Explanation:Even if the program code is encrypted using a random key to prevent signature-based identification, the decryption code that is required to run the program could be used as a signature for the antivirus program to identify the program as malware. This weakness can be exploited by malware developers who may use different encryption keys for each instance of the malware, but use the same decryption code, allowing antivirus programs to identify the malware based on the decryption code.

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