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Exam PT0-003 Topic 3 Question 150 Discussion
Actual exam question for CompTIA's PT0-003 exam
Question #: 150
Topic #: 3
Question #: 150
Topic #: 3
Which of the following is the most critical first step when dealing with an infected system to prevent re-infection after a breach?
Suggested Answer: A Vote an answer
Comprehensive and Detailed Explanation:
A reverse shell that is left on a target to maintain access is a form of persistence/backdoor. The action described - removing the reverse shell at the end of the engagement - is specifically the removal of a persistence mechanism. Post-engagement cleanup requires removal of any artifacts that provide continued access (web shells, scheduled tasks, reverse shells, cron jobs, created accounts, etc.) so the environment is returned to its pre-test state and to prevent later compromise.
Why not the others:
* B (Uninstalling tools): Removing tools is also a cleanup activity, but the question explicitly references removing the reverse shell (persistence).
* C (Preserving artifacts): Preserving artifacts is the opposite (saving logs/evidence) for incident response
- not removing access.
* D (Reverting configuration changes): Important, but the best single match for removing a reverse shell is "removing persistence mechanisms." PT0-003 mapping: Domain 5 - post-engagement cleanup and returning environment to baseline.
A reverse shell that is left on a target to maintain access is a form of persistence/backdoor. The action described - removing the reverse shell at the end of the engagement - is specifically the removal of a persistence mechanism. Post-engagement cleanup requires removal of any artifacts that provide continued access (web shells, scheduled tasks, reverse shells, cron jobs, created accounts, etc.) so the environment is returned to its pre-test state and to prevent later compromise.
Why not the others:
* B (Uninstalling tools): Removing tools is also a cleanup activity, but the question explicitly references removing the reverse shell (persistence).
* C (Preserving artifacts): Preserving artifacts is the opposite (saving logs/evidence) for incident response
- not removing access.
* D (Reverting configuration changes): Important, but the best single match for removing a reverse shell is "removing persistence mechanisms." PT0-003 mapping: Domain 5 - post-engagement cleanup and returning environment to baseline.
by Marshall at May 06, 2026, 01:26 AM
Here are all the actual test exam dumps for IT exams. Most people prepare for the actual exams with our test dumps to pass their exams. So it's critical to choose and actual test pdf to succeed.
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