First Step in Incident Response After Confirming Anomaly
A security analyst in the SOC observes a sudden spike in failed authentication attempts from a single external IP address targeting multiple user accounts over the last 30 minutes. After confirming the logs are accurate, which of the following actions should the analyst take FIRST according to standard incident response procedures?
Quick Answer
The answer is to escalate the incident to the incident response team. This is the correct first step after confirming an anomaly because standard incident response frameworks like NIST SP 800-61 mandate that detection and validation by a SOC analyst must be followed by formal escalation to ensure a coordinated, documented, and legally defensible response. Acting unilaterally—such as blocking the IP or disabling accounts—risks destroying forensic evidence or disrupting legitimate services without proper authorization. On the Security+ SY0-701 exam, this question tests your understanding of the incident response process phases: preparation, detection & analysis, containment, eradication, and recovery. A common trap is choosing an immediate containment action like blocking the IP, but the exam emphasizes that escalation precedes containment. Remember the memory tip: “Detect, Validate, Escalate—don’t isolate.”
⚠ Common exam trap
Test-takers frequently confuse 'immediate containment' with 'first action,' forgetting that escalation and validation must precede any technical countermeasure to ensure proper evidence preservation and coordinated response.
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
✓
Escalate the incident to the incident response team.
According to standard incident response procedures (NIST SP 800-61), the first step after confirming an anomaly is to escalate the incident to the incident response team. This ensures that a coordinated, documented, and legally defensible response is initiated, rather than taking unilateral action that could destroy evidence or disrupt legitimate services. The SOC analyst's role is to detect and validate, not to independently execute containment measures without authorization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Block the IP address at the firewall immediately.
Why it's wrong here
Blocking the IP address may be premature without first escalating the incident and obtaining authorization. It could also be an attacker using a VPN or a spoofed address, and the IP might be shared by legitimate users.
When this WOULD be correct
A question where the scenario explicitly states that the IP is confirmed malicious (e.g., from a known threat feed) and the organization's policy allows automated blocking for such indicators, with the analyst instructed to take immediate containment action.
- ✗
Disable all user accounts that were targeted.
Why it's wrong here
Disabling accounts without investigation could lock out legitimate users and might not be the most effective response. The incident response team needs to assess the situation before taking such disruptive action.
When this WOULD be correct
If the question stated that the failed authentication attempts were successful for several accounts, indicating a confirmed account compromise, then disabling those accounts immediately would be the correct first step to prevent further unauthorized access.
- ✓
Escalate the incident to the incident response team.
Why this is correct
Escalation is the first step after detection. The incident response team will follow the organization's plan to analyze, contain, eradicate, and recover from the incident. This ensures a coordinated and controlled response.
- ✗
Capture a memory dump of all affected servers.
Why it's wrong here
Capturing memory dumps is a forensic step that should occur later in the incident response process, typically after containment and with proper authorization, to preserve evidence without interfering with ongoing operations.
When this WOULD be correct
This would be correct if the question described a suspected malware infection or unauthorized access on a critical server, where preserving volatile evidence is crucial before any system changes or shutdowns.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The SY0-701 exam frequently reuses these exact scenarios with slightly different constraints.
✓Escalate the incident to the incident response team.Correct answer▾
Why this is correct
Escalation is the first step after detection. The incident response team will follow the organization's plan to analyze, contain, eradicate, and recover from the incident. This ensures a coordinated and controlled response.
✗Block the IP address at the firewall immediately.Wrong answer — click to see why▾
Why this is wrong here
Blocking the IP immediately bypasses proper incident response procedures, which require initial analysis and escalation to ensure the action is justified and does not disrupt legitimate traffic or alert an attacker prematurely.
★ When this WOULD be the correct answer
A question where the scenario explicitly states that the IP is confirmed malicious (e.g., from a known threat feed) and the organization's policy allows automated blocking for such indicators, with the analyst instructed to take immediate containment action.
Why candidates choose this
Candidates may think blocking the IP is a quick, effective containment step, but they overlook the need for proper escalation and analysis to avoid false positives and follow established protocols.
✗Disable all user accounts that were targeted.Wrong answer — click to see why▾
Why this is wrong here
Disabling all targeted user accounts is premature and overly disruptive; the analyst must first confirm the incident and escalate to the incident response team to coordinate a proper response, as per standard procedures.
★ When this WOULD be the correct answer
If the question stated that the failed authentication attempts were successful for several accounts, indicating a confirmed account compromise, then disabling those accounts immediately would be the correct first step to prevent further unauthorized access.
Why candidates choose this
Candidates may think that disabling accounts is a quick way to stop the attack, but they overlook the need for proper incident handling and the potential business impact of disabling accounts without verification.
✗Capture a memory dump of all affected servers.Wrong answer — click to see why▾
Why this is wrong here
Capturing a memory dump is a forensic step typically performed after containment and escalation, not as a first response to an ongoing brute-force attack. The immediate priority is to stop the attack and involve the incident response team.
★ When this WOULD be the correct answer
This would be correct if the question described a suspected malware infection or unauthorized access on a critical server, where preserving volatile evidence is crucial before any system changes or shutdowns.
Why candidates choose this
Candidates may think forensic evidence collection is always the first step, confusing incident response order or overemphasizing evidence preservation over immediate containment.
Analysis generated from the official SY0-701blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Incident Response Process
Key term
Authorization
Authorization determines what an authenticated user is allowed to do within a system, such as accessing files, running programs, or changing settings.
Key term
Security
Security in IT is the practice of protecting systems, networks, and data from unauthorized access, damage, or theft.
About these practice questions
One of 1,013 original SY0-701 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on SY0-701
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A security analyst notices repeated failed login attempts to a critical database server from a single external IP address over the past hour. The analyst reviews the authentication logs and sees that the account name used in each attempt is 'admin'. Which of the following security controls should the analyst recommend to mitigate this type of attack with minimal impact on legitimate users?
medium- A.Configure an account lockout policy to lock the 'admin' account after three failed attempts.
- ✓ B.Implement a temporary block rule on the perimeter firewall for the source IP address.
- C.Disable the 'admin' account until the source IP can be investigated.
- D.Require multi-factor authentication on the 'admin' account for all remote logins.
Why B: Implementing a temporary block rule on the perimeter firewall for the source IP address directly stops the attack at the network boundary, preventing further authentication attempts without affecting legitimate users who are not using that IP. This approach is a form of dynamic IP blocking, which is a common mitigation for brute-force attacks targeting a single account from a specific external source.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SY0-701 practice question is part of Courseiva's free CompTIA 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 SY0-701 exam.