hardmultiple choiceObjective-mapped

A penetration tester discovers a remote command injection vulnerability in a Java-based web application on a Windows server. The tester wants to execute a PowerShell reverse shell. Which encoding technique is most effective to avoid filter restrictions on special characters?

Question 1hardmultiple choice
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A penetration tester discovers a remote command injection vulnerability in a Java-based web application on a Windows server. The tester wants to execute a PowerShell reverse shell. Which encoding technique is most effective to avoid filter restrictions on special characters?

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Best answer

Base64 encoding

PowerShell supports -EncodedCommand, allowing the entire command to be Base64-encoded, which evades many filter restrictions on special characters.

B

Distractor review

URL encoding

URL encoding only encodes specific characters for HTTP transmission; it does not bypass application-level input filters that scan for command injection patterns.

C

Distractor review

Unicode encoding

Unicode encoding is not typically used to obfuscate PowerShell commands; it may also not be decoded by the shell automatically.

D

Distractor review

Hex encoding

Hex encoding is used for certain contexts like binary data, but PowerShell does not natively execute hex-encoded commands without additional decoding.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Related practice questions

Related PT0-002 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

FAQ

Questions learners often ask

What does this PT0-002 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Base64 encoding — Base64 encoding is commonly used for PowerShell commands because it avoids many character-based filters and can be decoded by PowerShell using the -EncodedCommand parameter. URL encoding may not bypass filters that block certain characters, Unicode encoding is less common in this context, and hex encoding is not natively supported by PowerShell for command execution.

What should I do if I get this PT0-002 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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