Quick Answer
The answer is token impersonation, as SeTcbPrivilege—also known as “Act as part of the operating system”—grants a process the ability to impersonate any user without authentication, including the SYSTEM account. When an attacker already holds LOCAL SYSTEM privileges and sees this token enabled via `whoami /priv`, they can leverage Windows API functions like `CreateProcessAsUser` or `DuplicateTokenEx` to spawn processes under arbitrary identities, effectively bypassing access controls and escalating laterally or to higher integrity levels. On the CEH exam, this scenario tests your understanding of Windows privilege escalation vectors, often appearing in questions about post-exploitation or token manipulation attacks; a common trap is confusing SeTcbPrivilege with SeDebugPrivilege, but remember that SeTcb is specifically about acting as the OS itself, not just debugging processes. A useful memory tip: “Tcb = Trusted Computing Base, meaning you are the base—you can become anyone.”
This CEH practice question tests your understanding of enumeration and system hacking. 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.
A security analyst notices that an attacker has gained SYSTEM privileges on a Windows server after compromising a service running as LOCAL SYSTEM. The attacker then uses `whoami /priv` and finds the SeTcbPrivilege (Act as part of the operating system) is enabled. Which privilege escalation technique might the attacker use next?
Sticky keys exploit
Why wrong: Sticky keys exploit is for backdoor via sethc.exe, not privilege escalation.
Token impersonation
SeTcbPrivilege enables token impersonation attacks.
DLL injection
Why wrong: DLL injection is not directly related to this privilege.
Pass-the-hash
Why wrong: Pass-the-hash uses NTLM hashes, not this privilege.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Token impersonation
SeTcbPrivilege allows impersonating any user, including SYSTEM. It can be used to execute processes under arbitrary identities, enabling further privilege escalation.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Sticky keys exploit
Why it's wrong here
Sticky keys exploit is for backdoor via sethc.exe, not privilege escalation.
Token impersonation
Why this is correct
SeTcbPrivilege enables token impersonation attacks.
Related concept
Authentication checks who the user is.
DLL injection
Why it's wrong here
DLL injection is not directly related to this privilege.
Pass-the-hash
Why it's wrong here
Pass-the-hash uses NTLM hashes, not this privilege.
Common exam traps
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CEH questions on access control and AAA configuration.
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FAQ
Enumeration and System Hacking — This question tests Enumeration and System Hacking — Authentication checks who the user is..
The correct answer is: Token impersonation — SeTcbPrivilege allows impersonating any user, including SYSTEM. It can be used to execute processes under arbitrary identities, enabling further privilege escalation.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CEH questions on access control and AAA configuration.
Authentication checks who the user is.
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Last reviewed: Jun 21, 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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