Ace Your CS0-003 CompTIA CySA+ Exam

Indicators of compromise (IoCs) are pieces of data or evidence that suggest a system or network has been compromised by an attacker or malware. IoCs can include IP addresses, domain names, URLs, file hashes, registry keys, network traffic patterns, user behaviors, or system anomalies. IoCs can be used to detect, analyze, and respond to security incidents, as well as to share threat intelligence with other organizations or authorities. IoCs can produce the data needed for an executive briefing on possible threats to the organization, as they can provide information on the source, nature, scope, impact, and mitigation of the threats.

The MTTD (Mean Time To Detect) is calculated by averaging the time elapsed in detecting incidents. From the given data: (180+150+170+140)/4 = 160 minutes. This is the correct answer according to the CompTIA CySA+ CS0-003 Certification Study Guide1, Chapter 4, page 161. References: CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 4, page 153; CompTIA CySA+ CS0-003 Certification Study Guide, Chapter 4, page 161.

The correct answer is D. MITRE ATT&CK.

MITRE ATT&CK is a framework that maps the tactics, techniques, and procedures (TTPs) of various threat actors and groups, based on real-world observations and data. MITRE ATT&CK can help a Chief Information Security Officer (CISO) to map all the attack vectors that the company faces each day, as well as to align their security controls around the most relevant and prevalent threats. MITRE ATT&CK can also help the CISO to assess the effectiveness and maturity of their security posture, as well as to identify and prioritize the gaps and improvements .

The other options are not the best recommendations for mapping all the attack vectors that the company faces each day. OSSTMM (Open Source Security Testing Methodology Manual) (A) is a methodology that provides guidelines and best practices for conducting security testing and auditing, but it does not map the TTPs of threat actors or groups. Diamond Model of Intrusion Analysis (B) is a model that analyzes the relationships and interactions between four elements of an intrusion: adversary, capability, infrastructure, and victim. The Diamond Model can help understand the characteristics and context of an intrusion, but it does not map the TTPs of threat actors or groups. OWASP (Open Web Application Security Project) © is a project that provides resources and tools for improving the security of web applications, but it does not map the TTPs of threat actors or groups.

 Select the command that generated the output in tab 1:

netstat -bo

 Select the command that generated the output in tab 2:

tasklist

 Identify the file responsible for the malicious behavior:

cmd.exe

Select the command that generated the output in tab 1: The output in tab 1 displays active network connections, which can be generated using the netstat command with options to display the owning process ID.

Select the command that generated the output in tab 1:

netstat -bo

Select the command that generated the output in tab 2: The output in tab 2 lists the running processes with their PIDs and memory usage, which can be generated using the tasklist command.

Select the command that generated the output in tab 2:

tasklist

Identify the file responsible for the malicious behavior: To identify the malicious file, we compare the hashes of the current files against the baseline hashes. From the provided data:

The hash for cmd.exe in the current state (tab 3) is 372ab227fd5ea779c211a1451881d1e1.

The baseline hash for cmd.exe (tab 4) is a2cdef1c445d3890cc3456789058cd21.

Since these hashes do not match, cmd.exe is the file responsible for the malicious behavior.