The answer is to isolate the endpoint from the network while keeping it powered on. This first action from the EDR console for suspected compromise is critical because it immediately cuts off the attacker’s command-and-control channel and prevents data exfiltration, all while preserving volatile evidence like running processes and memory contents for forensic analysis. On the Security+ SY0-701 exam, this scenario tests your understanding of the containment phase in incident response—specifically that network isolation via EDR takes priority over killing processes or deleting files, which could destroy evidence. A common trap is choosing to “shut down” the endpoint, but that wipes memory; instead, remember the mnemonic “ICE” for Isolate, Contain, Examine.
SY0-701 Security Operations Practice Question
This SY0-701 practice question tests your understanding of security operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: endpoint isolation prevents lateral movement and further data exfiltration.. 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.
EDR flags encoded PowerShell launched by a spreadsheet application, followed by an attempt to access LSASS and outbound HTTPS traffic to a rare domain. What should the analyst do first from the EDR console?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Isolate the endpoint from the network while keeping it powered on
Option B is correct because isolating the endpoint from the network while keeping it powered on preserves volatile evidence (e.g., running processes, memory contents) and prevents the attacker from exfiltrating data or establishing further C2 communication. The EDR console allows immediate network isolation without losing the ability to perform live forensics or memory analysis. This aligns with the incident response priority of containment before eradication or recovery.
Key principle: Endpoint isolation prevents lateral movement and further data exfiltration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Reboot the endpoint to terminate the suspicious processes
Why it's wrong here
Rebooting can destroy volatile evidence and may allow the attacker to regain persistence later.
✓
Isolate the endpoint from the network while keeping it powered on
Why this is correct
Isolation stops further communication and lateral movement while preserving evidence on a live system.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Endpoint isolation prevents lateral movement and further data exfiltration.
✗
Uninstall the spreadsheet application immediately
Why it's wrong here
Removing the application does not contain the active threat and may hinder later investigation.
✗
Block the rare domain and close the alert
Why it's wrong here
Blocking one destination is not sufficient when the host is already showing active compromise indicators.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse immediate containment (isolation) with eradication (reboot or uninstall), failing to recognize that preserving volatile evidence is critical for understanding the attack vector and scope before taking destructive actions.
Trap categories for this question
Command / output trap
Blocking one destination is not sufficient when the host is already showing active compromise indicators.
Detailed technical explanation
How to think about this question
LSASS (Local Security Authority Subsystem Service) is a privileged process that stores authentication credentials in memory; tools like Mimikatz use API calls (e.g., OpenProcess, MiniDumpWriteDump) to extract hashes. Outbound HTTPS to a rare domain suggests C2 beaconing, often using encrypted channels to evade detection. Network isolation at the EDR level typically applies a host-based firewall rule or disconnects the virtual NIC, blocking all traffic except to the EDR management plane, preserving the endpoint for memory acquisition via tools like WinPmem or Magnet RAM Capture.
KKey Concepts to Remember
Endpoint isolation prevents lateral movement and further data exfiltration.
Keeping the endpoint powered on preserves volatile memory for forensics.
Isolation severs C2 communication without destroying evidence.
It's a critical first step in the containment phase of incident response.
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
Endpoint isolation prevents lateral movement and further data exfiltration.
Real-world example
How this comes up in practice
A SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SY0-701 question in full detail.
Review endpoint isolation prevents lateral movement and further data exfiltration., then practise related SY0-701 questions on the same topic to reinforce the concept.
Security Operations — This question tests Security Operations — Endpoint isolation prevents lateral movement and further data exfiltration..
What is the correct answer to this question?
The correct answer is: Isolate the endpoint from the network while keeping it powered on — Option B is correct because isolating the endpoint from the network while keeping it powered on preserves volatile evidence (e.g., running processes, memory contents) and prevents the attacker from exfiltrating data or establishing further C2 communication. The EDR console allows immediate network isolation without losing the ability to perform live forensics or memory analysis. This aligns with the incident response priority of containment before eradication or recovery.
What should I do if I get this SY0-701 question wrong?
Review endpoint isolation prevents lateral movement and further data exfiltration., then practise related SY0-701 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Endpoint isolation prevents lateral movement and further data exfiltration.
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