312-38 Exam Dumps | You are using Wireshark to monitor your network traffic and you see a lot of packages with FIN, PUSH

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EC-COUNCIL.312-38.v2024-10-21.q146
Question 54

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Question 54/146

You are using Wireshark to monitor your network traffic and you see a lot of packages with FIN, PUSH and URG flags activated; what can you infer about this behavior?

A. The Layer 3 Controls are activated in the Switches

B. The Spanning Tree Protocol is activated in the Switches

C. One NIC is broadcasting erroneous traffic

D. An attacker is running a XMAS scan against the network

Correct Answer: D

The presence of packets with FIN, PUSH, and URG flags activated in network traffic, as observed through Wireshark, is indicative of a XMAS scan. This type of scan is used by attackers to identify open ports and services available on a networked computer. The peculiar combination of these TCP flags is not used in normal, everyday communications and is easily picked up by intrusion detection systems as anomalous. The XMAS scan derives its name from the fact that the packet lights up like a Christmas tree with several flags set, which is an unusual and conspicuous event in network traffic.
References: The characteristics of a XMAS scan and the use of these specific TCP flags are documented in network security literature and align with the Certified Network Defender (CND) course materials, which cover network scanning techniques and their identification123.

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