What SY0-701 Questions and Answers feature?

Data exfiltration is a technique that attackers use to steal sensitive data from a target system or network by transmitting it through DNS queries and responses. This method is often used in advanced persistent threat (APT) attacks, in which attackers seek to persistently evade detection in the target environment. A large amount of unusual DNS queries to systems on the internet over short periods of time during non-business hours is a strong indicator of data exfiltration. A worm, a logic bomb, and ransomware would not use DNS queries to communicate with their command and control servers or perform their malicious actions. References: CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, page 487; Introduction to DNS Data Exfiltration; Identifying a DNS Exfiltration Attack That Wasn’t Real — This Time

Comprehensive and Detailed In-Depth Explanation:

Operations security (OPSEC) focuses on identifying and protecting sensitive information to prevent unauthorized disclosure. In this scenario, the HR employee failed to safeguard confidential company information, leading to its exposure on social media.

Training in OPSEC would reinforce the need to maintain security best practices, such as locking screens when away from a device and ensuring that sensitive data is not exposed in unsecured locations.

Hybrid work environmentpolicies relate to managing remote and in-office work but do not specifically cover security risks like unauthorized data exposure.

Data loss prevention (DLP)deals with technology-based solutions to prevent unauthorized data transfers but does not address physical security practices.

Social engineeringrefers to deceptive tactics used by attackers to manipulate individuals, which is not applicable to this situation.

The HR employee should reviewoperations securitypolicies to prevent similar incidents in the future.

FIM stands for File Integrity Monitoring, which is a method to secure data by detecting any changes or modifications to files, directories, or registry keys. FIM can help a security administrator track any unauthorized or malicious changes to the data, as well as verify the integrity and compliance of the data. FIM can also alert the administrator of any potential breaches or incidents involving the data.

Some of the benefits of FIM are:

It can prevent data tampering and corruption by verifying the checksums or hashes of the files.

It can identify the source and time of the changes by logging the user and system actions.

It can enforce security policies and standards by comparing the current state of the data with the baseline or expected state.

It can support forensic analysis and incident response by providing evidence and audit trails of the changes.