Quick Answer
The answer is clearing the Security event log, as this action is the most effective for covering tracks on a Windows system because it removes all logged security events, including logon attempts, privilege use, and audit failures that would directly reveal an attacker’s activities. The Security log, maintained by the Windows Event Log service and governed by Local Security Policy, is the primary repository for audit records; deleting it eliminates forensic evidence of unauthorized access or changes. On the Certified Ethical Hacker CEH exam, this question tests your understanding of post-exploitation evasion techniques, often appearing in the covering tracks phase, with a common trap being to confuse clearing the Application or System logs—which contain less security-relevant data—with the Security log. A useful memory tip is to remember that the Security log is the “smoking gun” for intrusions, so attackers always target it first.
This CEH practice question tests your understanding of enumeration and system hacking. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An attacker has gained access to a system and wants to erase evidence of their activities. Which of the following actions is MOST effective for covering tracks on a Windows system?
Disabling the Windows Firewall
Why wrong: Does not erase logs.
Installing a rootkit
Why wrong: Rootkit hides presence but does not erase existing logs.
Clearing the Security event log
Event logs contain evidence of logins and activities.
Changing the administrator password
Why wrong: Does not cover tracks.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Clearing the Security event log
Clearing the Security event log (C) is the most effective action for covering tracks on a Windows system because it removes all logged security events, such as logon attempts, privilege use, and audit failures, which are the primary records that would reveal an attacker's activities. The Security log is maintained by the Windows Event Log service and is the default location for audit records under the Local Security Policy; deleting it eliminates forensic evidence of unauthorized access or changes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Disabling the Windows Firewall
Why it's wrong here
Does not erase logs.
Installing a rootkit
Why it's wrong here
Rootkit hides presence but does not erase existing logs.
Clearing the Security event log
Why this is correct
Event logs contain evidence of logins and activities.
Related concept
Read the scenario before looking for a memorised answer.
Changing the administrator password
Why it's wrong here
Does not cover tracks.
Common exam traps
EC-Council often tests the distinction between covering tracks (erasing evidence) and maintaining access or evading detection; the trap here is that candidates confuse installing a rootkit (which hides ongoing activity) with clearing logs (which removes past evidence), leading them to choose B instead of C.
Detailed technical explanation
The Windows Event Log service stores logs in .evtx files under %SystemRoot%\System32\winevt\Logs, with the Security log specifically at Security.evtx. Clearing this log via the Event Viewer or the wevtutil cli command (e.g., wevtutil cl Security) removes all entries, but it also generates a new Event ID 1102 (The audit log was cleared), which itself becomes a forensic artifact. In real-world scenarios, sophisticated attackers may selectively delete individual event records using tools like Invoke-Phantom or by directly manipulating the .evtx file with a hex editor to avoid triggering the 1102 event.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Enumeration and System Hacking — This question tests Enumeration and System Hacking — Read the scenario before looking for a memorised answer..
The correct answer is: Clearing the Security event log — Clearing the Security event log (C) is the most effective action for covering tracks on a Windows system because it removes all logged security events, such as logon attempts, privilege use, and audit failures, which are the primary records that would reveal an attacker's activities. The Security log is maintained by the Windows Event Log service and is the default location for audit records under the Local Security Policy; deleting it eliminates forensic evidence of unauthorized access or changes.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CEH practice question is part of Courseiva's free EC-Council 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 CEH exam.
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