[Latest Update] CompTIA CS0-003 Actual Exam Practice Questions Shared Online

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• QUESTION 1
• A cybersecurity analyst notices unusual network
  scanning activity coming from a country that the
  company does not do business with. Which of the
  following is the best mitigation technique?
• Geoblock the offending source country.
• Block the IP range of the scans at the network
  firewall.
• Perform a historical trend analysis and look for
  similar scanning activity.
• Block the specific IP address of the scans at the
  network firewall.
• Correct Answer B
• For the ones thinking that a whole country should
  get blocked, think about the CEO going on a
  vacation in that country. Being unable to reach
  the office or the web site would probably not fly
  well.

• QUESTION 2
• An analyst has been asked to validate the
  potential risk of a new ransomware campaign that
  the Chief Financial Officer read about in the
  newspaper. The company is a manufacturer of a
  very small spring used in the newest fighter jet
  and is a critical piece of the supply chain for
  this aircraft. Which of the following would be
  the best threat intelligence source to learn
  about this new campaign?
• Information sharing organization
• Blogs/forums
• Cybersecuritv incident response team
• Deep/dark web Correct Answer A
• An information sharing organization is a group or
  network of organizations that share threat
  intelligence, best practices, or lessons learned
  related to cybersecurity issues or incidents. An
  information sharing organization can help
  security analysts learn about new ransomware
  campaigns or other emerging threats, as well as
  get recommendations or guidance on how to
  prevent, detect, or respond to them. An
  information sharing organization can also help
  security analysts collaborate or coordinate with
  other organizations in the same industry or
  region that may face similar threats or
  challenges.

• QUESTION 3
• A security analyst detects an email server that
  had been compromised in the internal network.
  Users have been reporting strange messages in
  their email inboxes and unusual network traffic.
  Which of the following incident response steps
  should be performed next?
• Preparation
• Validation

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C. Containment D. Eradication Correct Answer
C Explanation After detecting a compromised
email server and unusual network traffic, the
next step in incident response is containment,
to prevent further damage or spread of the
compromise. References CompTIA CySA Study
Guide S0-003, 3rd Edition, Chapter 5 Incident
Response, page 197.

• QUESTION 4
• An analyst notices there is an internal device
  sending HTTPS traffic with additional characters
  in the header to a known- malicious IP in
  another country. Which of the following describes
  what the analyst has noticed?
• Beaconing
• Cross-site scripting
• Buffer overflow
• PHP traversal Correct Answer A

QUESTION 5 Patches for two highly exploited
vulnerabilities were released on the same Friday
afternoon. Information about the systems and
vulnerabilities is shown in the tables below
Which of the following should the security
analyst prioritize for remediation? A. rogers
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1. brady
2. brees
3. manning Correct Answer B

• QUESTION 6
• A security analyst discovers an LFI vulnerability
  that can be exploited to extract credentials from
  the underlying host. Which of the following
  patterns can the security analyst use to search
  the web server logs for evidence of exploitation
  of that particular vulnerability?
• /etc/shadow
• curl localhost
• printenv
• cat /proc/self/ Correct Answer A
• /etc/shadow is the pattern that the security
  analyst can use to search the web server logs for
  evidence of exploitation of the LFI
  vulnerability that can be exploited to extract
  credentials from the underlying host. LFI stands
  for Local File Inclusion, which is a
  ulnerability that allows an attacker to include
  local files on the web server into the output of
  a web application. LFI can be exploited to
  extract sensitive information from the web
  server, such as configuration files, passwords,
  or source code. The /etc/shadow file is a file
  that stores the encrypted passwords of all users
  on a Linux system. If an attacker can exploit
  the LFI vulnerability to include this file into
  the web application output, they can obtain the
  credentials of the users on the web server.
  Therefore, the security analyst can look for
  /etc/shadow in the request line of the web
  server logs to see if any attacker has attempted
  or succeeded in exploiting the LFI vulnerability.
• https//partners.comptia.org/docs/default-source/r
  esources/comptia-cysa-cs0-002-exam-objectives
  https//www.comptia.org/certifications/cybersecuri
  ty-analyst https//www.comptia.org/blog/the-new-co
  mptia- cybersecurity-analyst-your-questions-answe
  red

• QUESTION 7
• A security analyst noticed the following entry on
  a web server log
• Warning fopen (http//127.0.0.116) failed to
  open stream
• Connection refused in /hj/var/www/showimage.php
  on line 7 Which of the following malicious
  activities was most likely attempted?
• XSS
• CSRF
• SSRF

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D. RCE Correct Answer C The malicious activity
that was most likely attempted is SSRF
(Server-Side Request Forgery). This is a type of
attack that exploits a vulnerable web
application to make requests to other resources
on behalf of the web server. In this case, the
attacker tried to use the fopen function to
access the local loopback address (127.0.0.1) on
port 16, which could be a service that is not
intended to be exposed to the public. The
connection was refused, indicating that the port
was closed or filtered. References CompTIA
CySA Study Guide S0-003, 3rd Edition, Chapter
2 Software and Application Security, page 66.
QUESTION 8 A security analyst notices the
following proxy log entries

• Which of the following is the user attempting to
  do based on the log entries?
• Use a DoS attack on external hosts.
• Exfiltrate data.
• Scan the network.
• Relay email.
• Correct Answer D
• Based on the provided log entries, the user is
  attempting to relay email. This can be inferred
  from the log entries that show attempts to
  establish connections to external IP addresses on
  port 25, which is the default port for SMTP
  (Simple Mail Transfer Protocol) used for email
  transmission.

QUESTION 9 The analyst reviews the following
endpoint log entry Which of the following has
occurred?
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• Registry change
• Rename computer
• New account introduced
• Privilege escalation Correct Answer C
• The endpoint log entry shows that a new account
  named admin has been created on a Windows
  system with a local group membership of
  Administrators.
• This indicates that a new account has been
  introduced on the system with administrative
  privileges. This could be a sign of malicious
  activity, such as privilege escalation or
  backdoor creation, by an attacker who has
  compromised the system.

• QUESTION 10
• The Chief Executive Officer (CEO) has notified
  that a confidential trade secret has been
  compromised. Which of the following
  communication plans should the CEO initiate?
• Alert department managers to speak privately with
  affected staff.
• Schedule a press release to inform other service
  provider customers of the compromise.
• Disclose to all affected parties in the Chief
  Operating Officer for discussion and resolution.
• Verify legal notification requirements of PII and
  SPII in the legal and human resource departments.
• Correct Answer A
• Explanation The CEO should initiate an alert to
  department managers to speak privately with
  affected staff. This is because the trade secret
  is confidential and should not be disclosed to
  the public. Additionally, the CEO should verify
  legal notification requirements of PII and SPII
  in the legal and human resource departments to
  ensure compliance with data protection laws.
  References CompTIA CySA Study Guide S0-002,
  2nd Edition, Chapter 4, "Data Protection and
  Privacy Practices", page 194 CompTIA CySA
  Certification Exam Objectives Version 4.0, Domain
  4.0 "Compliance and Assessment", Objective 4.1
  "Given a scenario, analyze data as part of a
  security incident", Sub-objective "Data
  classification levels", page 23

QUESTION 11 During an incident, a security
analyst discovers a large amount of Pll has been
emailed externally from an employee to
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• a public email address. The analyst finds that
  the external email is the employee\\'s personal
  email.
• Which of the following should the analyst
  recommend be done first?
• Place a legal hold on the employee\\'s mailbox.
• Enable filtering on the web proxy.
• Disable the public email access with CASB.
• Configure a deny rule on the firewall.
• Correct Answer A
• Placing a legal hold on the employee\\'s mailbox
  is the best action to perform first, as it
  preserves all mailbox content, including deleted
  items and original versions of modified items,
  for potential legal or forensic purposes. A legal
  hold is a feature that allows an administrator
  to retain mailbox data for a user indefinitely or
  for a specified period, regardless of the
  user\\'s actions or retention policies. A legal
  hold can be applied to a mailbox using Litigation
  Hold or In-Place Hold in Exchange Server or
  Exchange Online. A legal hold can help to ensure
  that evidence of data exfiltration or other
  malicious activities is not lost or tampered
  with, and that the organization can comply with
  any legal or regulatory obligations. The other
  actions are not as urgent or effective as placing
  a legal hold on the employee\\'s mailbox, as they
  do not address the immediate threat of data loss
  or compromise. Enabling filtering on the web
  proxy may help to prevent some types of data
  exfiltration or malicious traffic, but it does
  not help to recover or preserve the data that has
  already been emailed externally. Disabling the
  public email access with CASB (Cloud Access
  Security Broker) may help to block or monitor
  the use of public email services by employees,
  but it does not help to recover or preserve the
  data that has already been emailed externally.
  Configuring a deny rule on the firewall may help
  to block or monitor the network traffic from the
  employee\\'s laptop, but it does not help to
  recover or preserve the data that has already
  been emailed externally.

QUESTION 12 A penetration tester is conducting a
test on an organization\\'s software development
website. The penetration tester sends the
following request to the web interface
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• Which of the following exploits is most likely
  being attempted?
• SQL injection
• Local file inclusion
• Cross-site scripting
• Directory traversal Correct Answer A
• Explanation SQL injection is a type of attack
  that injects malicious SQL statements into a web
  application\\'s input fields or parameters, in
  order to manipulate or access the underlying
  database. The request shown in the image contains
  an SQL injection attempt, as indicated by the
  "UNION SELECT" statement, which is used to
  combine the results of two or more queries. The
  attacker is trying to extract information from
  the database by appending the malicious query to
  the original one

• QUESTION 13
• Which of the following is the best metric for an
  organization to focus on given recent investments
  in SIEM, SOAR, and a ticketing system?
• Mean time to detect
• Number of exploits by tactic
• Alert volume

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D. Quantity of intrusion attempts Correct
Answer A Mean time to detect (MTTD) is the best
metric for an organization to focus on given
recent investments in SIEM, SOAR, and a
ticketing system. MTTD is a metric that measures
how long it takes to detect a security incident
or threat from the time it occurs. MTTD can be
improved by using tools and processes that can
collect, correlate, analyze, and alert on
security data from various sources. SIEM, SOAR,
and ticketing systems are examples of such tools
and processes that can help reduce MTTD and
enhance security operations. Official
https//www.eccouncil.org/cybersecurityexchange/th
reat-intelligence/cyber-kill-chain-seven-steps-cyb
erattack
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