CPENT Active Directory Attacks Practice Question
A penetration tester is attempting to perform Kerberoasting using Impacket. Which specific service principal name (SPN) format must be requested against the target domain controller to successfully extract TGS-AEAD tickets that can be cracked offline?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
MSSQLSvc/sqlserver01.corp.local:1433
Kerberoasting targets service principal names mapped to user accounts rather than machine accounts. Impacket's GetUserSPNs.py queries the Global Catalog for user accounts with a non-null servicePrincipalName attribute.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CIFS/dc01.corp.local
Why it's wrong here
CIFS SPNs are typically bound to domain controller machine accounts, not user accounts.
- ✓
MSSQLSvc/sqlserver01.corp.local:1433
Why this is correct
This is a valid SPN associated with a service account, making it susceptible to Kerberoasting if it maps to a standard user object.
- ✗
LDAP/dc01.corp.local
Why it's wrong here
LDAP SPNs are bound to the domain controller machine account and cannot be usefully cracked offline.
- ✗
HOST/dc01.corp.local
Why it's wrong here
HOST SPNs typically map to computer accounts (machine accounts) which use extremely complex, automatically rotated 128-byte passwords that are infeasible to crack.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This CPENT 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 CPENT exam.