While a school district is performing state testing, a security analyst notices that all internet services are unavailable. The analyst discovers that ARP poisoning is occurring on the network and then terminates access for the host. Which of the following is most likely responsible for this malicious activity?

Rationale

Unskilled attacker is most likely responsible for the ARP poisoning activity.

ARP poisoning is a common technique used by attackers, often executed by individuals with limited skills who leverage readily available tools to exploit network vulnerabilities. Their lack of expertise typically results in straightforward attacks, such as ARP spoofing, which can disrupt network services and indicate malicious intent.

A (Unskilled attacker) CORRECT

An unskilled attacker often employs basic tactics like ARP poisoning, which involves sending falsified ARP messages over a local network. This type of attack does not require advanced knowledge and is frequently executed by individuals seeking to disrupt services or intercept data without sophisticated techniques. The simplicity of ARP poisoning aligns with the behavior of less experienced attackers.

B (Shadow IT) YOUR ANSWER

Shadow IT refers to the use of unauthorized applications or devices within an organization, often without the knowledge of IT departments. While shadow IT can pose significant security risks, it is not directly associated with ARP poisoning, which requires intentional manipulation of network protocols rather than simply using unapproved technology.

C (Credential stuffing) YOUR ANSWER

Credential stuffing is a cyber attack where stolen username and password pairs are used to gain unauthorized access to accounts. This method does not relate to ARP poisoning, as it targets user accounts and online services rather than manipulating network traffic or addressing local network vulnerabilities.

D (DMARC failure) YOUR ANSWER

DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol designed to prevent email spoofing. A DMARC failure pertains to issues in email security and has no direct relevance to ARP poisoning, which impacts local network communications rather than email integrity.

Conclusion

In summary, the ARP poisoning incident is most likely the work of an unskilled attacker, who employs simple yet effective methods to disrupt network services. Other options such as shadow IT, credential stuffing, and DMARC failures do not fit the context of network manipulation involved in ARP attacks, emphasizing the necessity to recognize the specific threats posed by less experienced individuals exploiting basic network vulnerabilities.

Unskilled attacker is most likely responsible for the ARP poisoning activity.

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