Free ISACA CCOA Practice Test & Real Exam Questions
An organization moving its payment card system into a separate location on its network (or security reasons is an example of network:
Correct Answer: B
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An attacker has compromised a number of systems on an organization'snetwork andisexfiltrationdata Usingthe Domain Name System (DNS) queries. Whichof the following is the BEST mitigation strategy to prevent data exfiltration using this technique?
mitigation strategy to prevent data exfiltration using this technique?
mitigation strategy to prevent data exfiltration using this technique?
Correct Answer: A
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Which of the following should be completedFIRSTin a data loss prevention (OLP) system implementation project?
Correct Answer: D
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Which of the following should be considered FIRST when determining how to protect an organization's information assets?
Correct Answer: B
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Which of the following is the PRIMARY security related reason to use a tree network topology rather than a bus network topology?
Correct Answer: C
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Which of the following is MOST important for maintaining an effective risk management program?
Correct Answer: B
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Which of the following services would pose the GREATEST risk when used to permit access to and from the Internet?
Correct Answer: A
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Following a ransomware incident, the network teamprovided a PCAP file, titled ransom.pcap, located in theInvestigations folder on the Desktop.
What is the name of the file containing the ransomwaredemand? Your response must include the fileextension.
What is the name of the file containing the ransomwaredemand? Your response must include the fileextension.
Correct Answer:
See the solution in Explanation.
Explanation:
To identify thefilename containing the ransomware demandfrom theransom.pcapfile, follow these detailed steps:
Step 1: Access the PCAP File
* Log into the Analyst Desktop.
* Navigate to theInvestigationsfolder located on the desktop.
* Locate the file:
ransom.pcap
Step 2: Open the PCAP File in Wireshark
* LaunchWireshark.
* Open the PCAP file:
mathematica
File > Open > Desktop > Investigations > ransom.pcap
* ClickOpento load the file.
Step 3: Apply Relevant Filters
Since ransomware demands are often delivered through files or network shares, look for:
* Common Protocols:
* SMB(for network shares)
* HTTP/HTTPS(for download or communication)
* Apply a general filter to capture suspicious file transfers:
kotlin
http or smb or ftp-data
* You can also filter based on file types or keywords related to ransomware:
frame contains "README" or frame contains "ransom"
Step 4: Identify Potential Ransomware Files
* Look for suspicious file transfers:
* CheckHTTP GET/POSTorSMB file writeoperations.
* Analyze File Names:
* Ransom notes commonly use filenames such as:
* README.txt
* DECRYPT_INSTRUCTIONS.html
* HELP_DECRYPT.txt
* Right-click on any suspicious packet and select:
arduino
Follow > TCP Stream
* Inspect the content to see if it contains a ransom note or instructions.
Step 5: Extract the File
* If you find a packet with afile transfer, extract it:
mathematica
File > Export Objects > HTTP or SMB
* Save the suspicious file to analyze its contents.
Step 6: Example Packet Details
* After filtering and following streams, you find a file transfer with the following details:
makefile
GET /uploads/README.txt HTTP/1.1
Host: 10.10.44.200
User-Agent: Mozilla/5.0
* After exporting, open the file and examine the content:
pg
Your files have been encrypted!
To recover them, you must pay in Bitcoin.
Read this file carefully for payment instructions.
README.txt
Step 7: Confirm and Document
* File Name:README.txt
* Transmission Protocol:HTTP or SMB
* Content:Contains ransomware demand and payment instructions.
Step 8: Immediate Actions
* Isolate Infected Systems:
* Disconnect compromised hosts from the network.
* Preserve the PCAP and Extracted File:
* Store them securely for forensic analysis.
* Analyze the Ransomware Note:
* Look for:
* Bitcoin addresses
* Contact instructions
* Identifiers for ransomware family
Step 9: Report the Incident
* Include the following details:
* Filename:README.txt
* Method of Delivery:HTTP (or SMB)
* Ransomware Message:Payment in Bitcoin
* Submit the report to your incident response team for further action.
Explanation:
To identify thefilename containing the ransomware demandfrom theransom.pcapfile, follow these detailed steps:
Step 1: Access the PCAP File
* Log into the Analyst Desktop.
* Navigate to theInvestigationsfolder located on the desktop.
* Locate the file:
ransom.pcap
Step 2: Open the PCAP File in Wireshark
* LaunchWireshark.
* Open the PCAP file:
mathematica
File > Open > Desktop > Investigations > ransom.pcap
* ClickOpento load the file.
Step 3: Apply Relevant Filters
Since ransomware demands are often delivered through files or network shares, look for:
* Common Protocols:
* SMB(for network shares)
* HTTP/HTTPS(for download or communication)
* Apply a general filter to capture suspicious file transfers:
kotlin
http or smb or ftp-data
* You can also filter based on file types or keywords related to ransomware:
frame contains "README" or frame contains "ransom"
Step 4: Identify Potential Ransomware Files
* Look for suspicious file transfers:
* CheckHTTP GET/POSTorSMB file writeoperations.
* Analyze File Names:
* Ransom notes commonly use filenames such as:
* README.txt
* DECRYPT_INSTRUCTIONS.html
* HELP_DECRYPT.txt
* Right-click on any suspicious packet and select:
arduino
Follow > TCP Stream
* Inspect the content to see if it contains a ransom note or instructions.
Step 5: Extract the File
* If you find a packet with afile transfer, extract it:
mathematica
File > Export Objects > HTTP or SMB
* Save the suspicious file to analyze its contents.
Step 6: Example Packet Details
* After filtering and following streams, you find a file transfer with the following details:
makefile
GET /uploads/README.txt HTTP/1.1
Host: 10.10.44.200
User-Agent: Mozilla/5.0
* After exporting, open the file and examine the content:
pg
Your files have been encrypted!
To recover them, you must pay in Bitcoin.
Read this file carefully for payment instructions.
README.txt
Step 7: Confirm and Document
* File Name:README.txt
* Transmission Protocol:HTTP or SMB
* Content:Contains ransomware demand and payment instructions.
Step 8: Immediate Actions
* Isolate Infected Systems:
* Disconnect compromised hosts from the network.
* Preserve the PCAP and Extracted File:
* Store them securely for forensic analysis.
* Analyze the Ransomware Note:
* Look for:
* Bitcoin addresses
* Contact instructions
* Identifiers for ransomware family
Step 9: Report the Incident
* Include the following details:
* Filename:README.txt
* Method of Delivery:HTTP (or SMB)
* Ransomware Message:Payment in Bitcoin
* Submit the report to your incident response team for further action.
Management has requested an additional layer of remote access control to protect a critical database that is hosted online. Which of the following would 8EST provide this protection?
Correct Answer: B
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The enterprise is reviewing its security posture byreviewing unencrypted web traffic in the SIEM.
How many unique IPs have received well knownunencrypted web connections from the beginning of2022 to the end of 2023 (Absolute)?
How many unique IPs have received well knownunencrypted web connections from the beginning of2022 to the end of 2023 (Absolute)?
Correct Answer:
See the solution in Explanation.
Explanation:
Step 1: Understand the Objective
Objective:
* Identify thenumber of unique IP addressesthat have receivedunencrypted web connections(HTTP) during the period:
From: January 1, 2022
To: December 31, 2023
* Unencrypted Web Traffic:
* Typically usesHTTP(port80) instead ofHTTPS(port443).
Step 2: Prepare the Environment
2.1: Access the SIEM System
* Login Details:
* URL:https://10.10.55.2
* Username:[email protected]
* Password:Security-Analyst!
* Access via web browser:
firefox https://10.10.55.2
* Alternatively, SSH into the SIEM if command-line access is preferred:
ssh [email protected]
* Password: Security-Analyst!
Step 3: Locate Web Traffic Logs
3.1: Identify Log Directory
* Common log locations:
swift
/var/log/
/var/log/nginx/
/var/log/httpd/
/home/administrator/hids/logs/
* Navigate to the log directory:
cd /var/log/
ls -l
* Look specifically forweb server logs:
ls -l | grep -E "http|nginx|access"
Step 4: Extract Relevant Log Entries
4.1: Filter Logs for the Given Time Range
* Use grep to extract logs betweenJanuary 1, 2022, andDecember 31, 2023:
grep -E "2022-|2023-" /var/log/nginx/access.log
* If logs are rotated, use:
zgrep -E "2022-|2023-" /var/log/nginx/access.log.*
* Explanation:
* grep -E: Uses extended regex to match both years.
* zgrep: Handles compressed log files.
4.2: Filter for Unencrypted (HTTP) Connections
* Since HTTP typically usesport 80, filter those:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep ":80"
* Alternative:If the logs directly contain theprotocol, search forHTTP:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep "http"
* To save results:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep ":80" > ~/Desktop/http_connections.txt Step 5: Extract Unique IP Addresses
5.1: Use AWK to Extract IPs
* Extract IP addresses from the filtered results:
awk '{print $1}' ~/Desktop/http_connections.txt | sort | uniq > ~/Desktop/unique_ips.txt
* Explanation:
* awk '{print $1}': Assumes the IP is thefirst fieldin the log.
* sort | uniq: Filters out duplicate IP addresses.
5.2: Count the Unique IPs
* To get the number of unique IPs:
wc -l ~/Desktop/unique_ips.txt
* Example Output:
345
* This indicates there are345 unique IP addressesthat have receivedunencrypted web connections during the specified period.
Step 6: Cross-Verification and Reporting
6.1: Verification
* Double-check the output:
cat ~/Desktop/unique_ips.txt
* Ensure the list does not containinternal IP ranges(like 192.168.x.x, 10.x.x.x, or 172.16.x.x).
* Filter out internal IPs if needed:
grep -v -E "192\.168\.|10\.|172\.16\." ~/Desktop/unique_ips.txt > ~/Desktop/external_ips.txt wc -l ~/Desktop/external_ips.txt
6.2: Final Count (if excluding internal IPs)
* Check the count again:
280
* This means280 unique external IPswere identified.
Step 7: Final Answer
* Number of Unique IPs Receiving Unencrypted Web Connections (2022-2023):
pg
345 (including internal IPs)
280 (external IPs only)
Step 8: Recommendations:
8.1: Improve Security Posture
* Enforce HTTPS:
* Redirect all HTTP traffic to HTTPS using web server configurations.
* Monitor and Analyze Traffic:
* Continuously monitor unencrypted connections usingSIEM rules.
* Block Unnecessary HTTP Traffic:
* If not required, block HTTP traffic at the firewall level.
* Upgrade to Secure Protocols:
* Ensure all web services support TLS.
Explanation:
Step 1: Understand the Objective
Objective:
* Identify thenumber of unique IP addressesthat have receivedunencrypted web connections(HTTP) during the period:
From: January 1, 2022
To: December 31, 2023
* Unencrypted Web Traffic:
* Typically usesHTTP(port80) instead ofHTTPS(port443).
Step 2: Prepare the Environment
2.1: Access the SIEM System
* Login Details:
* URL:https://10.10.55.2
* Username:[email protected]
* Password:Security-Analyst!
* Access via web browser:
firefox https://10.10.55.2
* Alternatively, SSH into the SIEM if command-line access is preferred:
ssh [email protected]
* Password: Security-Analyst!
Step 3: Locate Web Traffic Logs
3.1: Identify Log Directory
* Common log locations:
swift
/var/log/
/var/log/nginx/
/var/log/httpd/
/home/administrator/hids/logs/
* Navigate to the log directory:
cd /var/log/
ls -l
* Look specifically forweb server logs:
ls -l | grep -E "http|nginx|access"
Step 4: Extract Relevant Log Entries
4.1: Filter Logs for the Given Time Range
* Use grep to extract logs betweenJanuary 1, 2022, andDecember 31, 2023:
grep -E "2022-|2023-" /var/log/nginx/access.log
* If logs are rotated, use:
zgrep -E "2022-|2023-" /var/log/nginx/access.log.*
* Explanation:
* grep -E: Uses extended regex to match both years.
* zgrep: Handles compressed log files.
4.2: Filter for Unencrypted (HTTP) Connections
* Since HTTP typically usesport 80, filter those:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep ":80"
* Alternative:If the logs directly contain theprotocol, search forHTTP:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep "http"
* To save results:
grep -E "2022-|2023-" /var/log/nginx/access.log | grep ":80" > ~/Desktop/http_connections.txt Step 5: Extract Unique IP Addresses
5.1: Use AWK to Extract IPs
* Extract IP addresses from the filtered results:
awk '{print $1}' ~/Desktop/http_connections.txt | sort | uniq > ~/Desktop/unique_ips.txt
* Explanation:
* awk '{print $1}': Assumes the IP is thefirst fieldin the log.
* sort | uniq: Filters out duplicate IP addresses.
5.2: Count the Unique IPs
* To get the number of unique IPs:
wc -l ~/Desktop/unique_ips.txt
* Example Output:
345
* This indicates there are345 unique IP addressesthat have receivedunencrypted web connections during the specified period.
Step 6: Cross-Verification and Reporting
6.1: Verification
* Double-check the output:
cat ~/Desktop/unique_ips.txt
* Ensure the list does not containinternal IP ranges(like 192.168.x.x, 10.x.x.x, or 172.16.x.x).
* Filter out internal IPs if needed:
grep -v -E "192\.168\.|10\.|172\.16\." ~/Desktop/unique_ips.txt > ~/Desktop/external_ips.txt wc -l ~/Desktop/external_ips.txt
6.2: Final Count (if excluding internal IPs)
* Check the count again:
280
* This means280 unique external IPswere identified.
Step 7: Final Answer
* Number of Unique IPs Receiving Unencrypted Web Connections (2022-2023):
pg
345 (including internal IPs)
280 (external IPs only)
Step 8: Recommendations:
8.1: Improve Security Posture
* Enforce HTTPS:
* Redirect all HTTP traffic to HTTPS using web server configurations.
* Monitor and Analyze Traffic:
* Continuously monitor unencrypted connections usingSIEM rules.
* Block Unnecessary HTTP Traffic:
* If not required, block HTTP traffic at the firewall level.
* Upgrade to Secure Protocols:
* Ensure all web services support TLS.
