312-39 Dumps with Practice Exam Questions Answers

A SOC Analyst would use Netstat Data tomonitor connections to insecure ports. Netstat, which stands for network statistics, is a command-line tool that displays incoming and outgoing network connections (both TCP and UDP), routing tables, and a number of network interface and network protocol statistics. It is available on various operating systems, including Windows, Linux, and Unix, and is used for finding problems in the network and to determine the amount of traffic on the network as a performance measurement.

MagicTree is a data management tool designed for penetration testers, incident handlers, and IT security professionals. It is particularly useful for handling the voluminous data typically generated during a security assessment or incident response process. MagicTree allows users to import and aggregate data from various sources, organize it in a structured manner, and generate comprehensive reports. This tool helps in consolidating and making sense of the data, which is crucial for efficient incident handling and reporting.

Egress filtering is a network security measure that involves scanning the headers of IPpackets as they leave a network. The purpose of this technique is to ensure that unauthorized or malicious traffic does not exit the internal network. This is achieved by implementing rules that define which types of traffic are allowed to leave the network. By filtering outgoing traffic, egress filtering helps prevent data exfiltration and blocks the communication of malware with external command-and-control servers.

Human Intelligence (HUMINT) involves information gathered from people, relationships, and human behavior rather than purely technical artifacts. The scenario describes adversaries using social engineering and pretexting—building trust through conversations and manipulating employees to reveal sensitive information. The analyst is focusing on deception detection and psychological profiling, which are rooted in understanding human intent, influence tactics, and interpersonal manipulation patterns. That aligns with HUMINT, where insights may come from interviews, insider reporting, investigative findings, or controlled engagements that reveal motivations and methods that logs will not show. Threat intelligence feeds and technical threat intelligence primarily provide machine-consumable indicators, malware signatures, infrastructure data, and observed TTPs; they are valuable but not the main lens here because these attackers “rarely leave digital footprints.” OSINT is derived from publicly available sources, which can help identify personas or prior campaigns, but the core described intelligence method is interpreting human behavior and social manipulation. From a SOC standpoint, HUMINT-driven insights inform security awareness training, executive protection protocols, identity verification procedures, and “out-of-band” validation processes that reduce success of pretexting and business email compromise.

Juliea, the SOC analyst, noticed large TXT and NULL payloads in the logs. This is indicative of a DNS exfiltration attempt. DNS exfiltration is a type of cyber attack where an attacker uses the DNS protocol to sneak data out of a network undetected. It typically involves the use of large TXT records, which can be used to carry data out of the network. NULL payloads can be used in this context to pad the DNS queries and make them less suspicious or to bypass security controls that inspect the content of DNSqueries.

The steps involved in DNS exfiltration include:

The attacker compromises a system within the target network.

Malware on the compromised system encodes the data it wants to exfiltrate.

The encoded data is split into chunks that fit into DNS query sizes.

These chunks are sent as data in DNS queries or responses, often using TXT records.

An external attacker-controlled server receives the DNS queries and decodes the data.