The answer is to create a backdoor user account. After exploiting a buffer overflow to gain code execution, the next best step is establishing persistence by adding a local user, typically via commands like `net user` on Windows or `useradd` on Linux. This approach is preferred because the buffer overflow itself is often unstable or may be patched after detection, whereas a hidden user account provides reliable, repeatable access for lateral movement or data exfiltration. On the CompTIA PenTest+ PT0-002 exam, this question tests your understanding of post-exploitation persistence priorities—specifically that maintaining access trumps immediate privilege escalation or data theft. A common trap is choosing to immediately dump credentials or install a reverse shell, but those methods are less stealthy and more likely to be disrupted. Remember the mnemonic “Backdoor Before Breadcrumbs”—always secure persistent access before leaving traces of your activity.
PT0-002 Attacks and Exploits Practice Question
This PT0-002 practice question tests your understanding of attacks and exploits. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a penetration test, a tester exploits a buffer overflow vulnerability in a legacy application. After gaining code execution, what is the next best step to maintain access?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a backdoor user account
After gaining code execution via a buffer overflow, the next best step is to create a backdoor user account to maintain persistent access to the compromised system. This ensures the tester can re-enter the environment without re-exploiting the vulnerability, which may be patched or monitored. Creating a local user account (e.g., via `net user` or `useradd`) is a standard persistence technique in penetration testing, allowing continued access for lateral movement or data exfiltration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create a backdoor user account
Why this is correct
A backdoor account provides reliable access even if the exploit is patched.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Install an antivirus solution
Why it's wrong here
Antivirus may detect the tester's tools and alert the target.
✗
Patch the buffer overflow vulnerability
Why it's wrong here
Patched vulnerability removes the entry point, potentially locking the tester out.
✗
Erase the application logs
Why it's wrong here
Covering tracks is important but persistence takes priority for continued access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between maintaining access (persistence) and covering tracks (log deletion) or remediation (patching), leading candidates to mistakenly choose log erasure or patching as the immediate next step after exploitation.
Detailed technical explanation
How to think about this question
Buffer overflow exploits often rely on overwriting a return address or function pointer to redirect execution to shellcode. Once code execution is achieved, creating a backdoor user account (e.g., adding an entry to `/etc/passwd` on Linux or using `net user /add` on Windows) provides a reliable persistence mechanism that survives reboots and does not depend on the original vulnerable service. In a real-world scenario, the tester might also disable password expiration or add the account to the Administrators or root group to ensure elevated privileges remain available.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PT0-002 question in full detail.
Attacks and Exploits — This question tests Attacks and Exploits — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a backdoor user account — After gaining code execution via a buffer overflow, the next best step is to create a backdoor user account to maintain persistent access to the compromised system. This ensures the tester can re-enter the environment without re-exploiting the vulnerability, which may be patched or monitored. Creating a local user account (e.g., via `net user` or `useradd`) is a standard persistence technique in penetration testing, allowing continued access for lateral movement or data exfiltration.
What should I do if I get this PT0-002 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PT0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PT0-002 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.