CREST Updated CPTIA Exam Questions and Answers by jaden

Avoiding VPN (Virtual Private Network) and other secure network channels is not a countermeasure to eradicate inappropriate usage incidents. On the contrary, using VPNs and secure network channels is a best practice for enhancing security, as these technologies help protectdata in transit, ensuring that it is encrypted and less susceptible to interception or eavesdropping. Countermeasures for inappropriate usage typically involve enhancing security and monitoring, not reducing the security of communications.

The regular expression/exec(\s|\+)+(s|x)p\w+/ixis designed to match patterns that resemble SQL injection attempts, specifically targeting MS SQL Server. This expression looks for the use of theexeccommand followed by one or more spaces or plus signs, and then patterns that start withsporxp, which are prefixes commonly used in SQL Server stored procedures and extended stored procedures. These are often targeted in SQL injection attacks to execute malicious SQL statements. The regular expression provided is a tool used by incident responders like Tibson to identify and analyze potential SQL injection attempts by looking for suspicious patterns in SQL queries.

Internal intelligence feeds are derived from data and information collected within an organization's own networks and systems. Jian's activities, such as real-time assessment of system activities and acquiring feeds from honeynets, P2P monitoring, infrastructure, and application logs, fall under the collection of internal intelligence feeds. These feeds are crucial for identifying potential threats and vulnerabilities within the organization and form a fundamental part of a comprehensive threat intelligence program. They contrast with external intelligence feeds, which are sourced from outside the organization and include information on broader cyber threats, trends, and TTPs of threat actors.References:

"Building an Intelligence-Led Security Program" by Allan Liska

"Threat Intelligence: Collecting, Analysing, Evaluating" by M-K. Lee, L. Healey, and P. A. Porras

The port scanning technique that involves resetting the TCP connection between the client and server abruptly before the completion of the three-way handshake, thereby leaving the connection half-open, is known as a Stealth scan (also referred to as a SYN scan). This technique allows the scanner to inquire about the status of a port without establishing a full TCP connection, making the scan less detectible to intrusion detection systems and less likely to be logged by the target. It's a method used to discreetly discover open ports on a target machine without establishing a full connection that would be visible in logs.References:CREST materials often cover different types of network scanning techniques, including Stealth scans, explaining their methodologies, purposes, and how they can be detected or mitigated.