The answer is restoring from offline backups taken before the attack. This is the best ransomware recovery strategy because offline backups are physically or logically disconnected from the network, so the ransomware cannot encrypt or corrupt them during the attack, ensuring the recovered data is clean and free from encryption. On the Certified Information Systems Auditor CISA exam, this question tests your understanding of business continuity and disaster recovery controls, specifically the principle that any backup connected to the network during an attack is potentially compromised. A common trap is choosing system restore points or online backups, which may also be encrypted or altered by the malware. Remember the memory tip: “Offline is the lifeline” — if it’s not connected, it’s not infected.
CISA Protection of Information Assets Practice Question
This CISA practice question tests your understanding of protection of information assets. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 organization experiences a ransomware attack that encrypts critical files. Which of the following is the BEST recovery strategy to minimize data loss?
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.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restore from offline backups taken before the attack
Restoring from offline backups taken before the attack ensures that the recovered data is clean and free from encryption, as the ransomware cannot modify backups that are not connected to the network. This strategy minimizes data loss by reverting to the most recent known-good state without relying on potentially compromised or incomplete system restore points.
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.
✗
Disconnect the network and rebuild systems from scratch
Why it's wrong here
Rebuilding from scratch is time-consuming and may not recover all data if backups are not used.
✗
Pay the ransom to decrypt files
Why it's wrong here
Paying the ransom does not guarantee decryption and encourages further attacks.
✓
Restore from offline backups taken before the attack
Why this is correct
Offline backups (e.g., tape or immutable cloud) are not accessible to ransomware, enabling clean recovery.
Clue confirmation
The clue words "best", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use system restore points on the same network
Why it's wrong here
System restore points on the same network may have been encrypted or compromised by the ransomware.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose Option D (system restore points) because they seem convenient and built-in, but they fail to realize that ransomware specifically targets and deletes these snapshots, making them unreliable for recovery.
Detailed technical explanation
How to think about this question
Offline backups, such as those stored on disconnected external drives or immutable cloud storage (e.g., AWS S3 Object Lock), prevent ransomware from encrypting or deleting backup files. In a real-world scenario, attackers often target and delete Volume Shadow Copy (VSS) snapshots on Windows systems using commands like 'vssadmin delete shadows /all', making online restore points useless. A robust 3-2-1 backup strategy (three copies, two media types, one offsite) is critical for recovery.
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 practitioner preparing for the CISA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Protection of Information Assets — This question tests Protection of Information Assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Restore from offline backups taken before the attack — Restoring from offline backups taken before the attack ensures that the recovered data is clean and free from encryption, as the ransomware cannot modify backups that are not connected to the network. This strategy minimizes data loss by reverting to the most recent known-good state without relying on potentially compromised or incomplete system restore points.
What should I do if I get this CISA 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", "minimum / minimize". 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.
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