ISACA Certified Cybersecurity Operations Analyst - CCOA무료 덤프문제 풀어보기

설명: (Fast2test 회원만 볼 수 있음)

See the solution in Explanation.
Explanation:
To identify the name of the suspected malicious file captured by the keyword process.executable at11:04 PM onAugust 19, 2024, follow these detailed steps:
Step 1: Access the Alert Bulletin
* Locate the alert file:
* Access thealerts folderon your system.
* Look for the file named:
* Open the file:
* Use a PDF reader to examine the contents.
Step 2: Understand the Alert Context
* The bulletin indicates that the network was compromised at around11:00 PM.
* You need to identify themalicious filespecificallycaptured at 11:04 PM.
Step 3: Access System Logs
* Use yourSIEMorlog management systemto examine recent logs.
* Filter the logs to narrow down the events:
* Time Frame:August 19, 2024, from11:00 PM to 11:10 PM.
* Keyword:process.executable.
Example SIEM Query:
index=system_logs
| search "process.executable"
| where _time between "2024-08-19T23:04:00" and "2024-08-19T23:05:00"
| table _time, process_name, executable_path, hash
Step 4: Analyze Log Entries
* The query result should show log entries related to theprocess executablethat was triggered at11:04 PM
.
* Focus on entries that:
* Appear unusual or suspicious.
* Match known indicators from thealert bulletin (alert_33.pdf).
Example Log Output:
_time process_name executable_path hash
2024-08-19T23:04 evil.exe C:\Users\Public\evil.exe 4d5e6f...
Step 5: Cross-Reference with Known Threats
* Check the hash of the executable file against:
* VirusTotalor internal threat intelligence databases.
* Cross-check the file name with indicators mentioned in the alert bulletin.
Step 6: Final Confirmation
* The suspected malicious file captured at11:04 PMis the one appearing in the log that matches the alert details.
The name of the suspected malicious file captured by keyword process.executable at 11:04 PM is: evil.exe Step 7: Take Immediate Remediation Actions
* Isolate the affected hostto prevent further damage.
* Quarantine the malicious filefor analysis.
* Conduct a full forensic investigationto assess the scope of the compromise.
* Update threat signaturesand indicators across the environment.
Step 8: Report and Document
* Document the incident, including:
* Time of detection:11:04 PM on August 19, 2024.
* Malicious file name:evil.exe.
* Location:C:\Users\Public\evil.exe.
* Generate an incident reportfor further investigation.

설명: (Fast2test 회원만 볼 수 있음)

설명: (Fast2test 회원만 볼 수 있음)

설명: (Fast2test 회원만 볼 수 있음)

설명: (Fast2test 회원만 볼 수 있음)

설명: (Fast2test 회원만 볼 수 있음)

See the solution in Explanation.
Explanation:
Step 1: Understand the Task and Objective
Objective:
* Identify thehost IP targetedduring thespecified time frame:
vbnet
11:39 PM to 11:43 PM on August 16, 2024
* The relevant file to examine:
nginx
CCOA Threat Bulletin.pdf
* File location:
javascript
~/Desktop/CCOA Threat Bulletin.pdf
Step 2: Access and Analyze the Bulletin
2.1: Access the PDF File
* Open the file using a PDF reader:
xdg-open ~/Desktop/CCOA\ Threat\ Bulletin.pdf
* Alternative (if using CLI-based tools):
pdftotext ~/Desktop/CCOA\ Threat\ Bulletin.pdf - | less
* This command converts the PDF to text and allows you to inspect the content.
2.2: Review the Bulletin Contents
* Focus on:
* Specific dates and times mentioned.
* Indicators of Compromise (IoCs), such asIP addressesortimestamps.
* Any references toAugust 16, 2024, particularly between11:39 PM and 11:43 PM.
Step 3: Search for Relevant Logs
3.1: Locate the Logs
* Logs are likely stored in a central logging server or SIEM.
* Common directories to check:
swift
/var/log/
/home/administrator/hids/logs/
/var/log/auth.log
/var/log/syslog
* Navigate to the primary logs directory:
cd /var/log/
ls -l
3.2: Search for Logs Matching the Date and Time
* Use the grep command to filter relevant logs:
grep "2024-08-16 23:3[9-9]\|2024-08-16 23:4[0-3]" /var/log/syslog
* Explanation:
* grep: Searches for the timestamp pattern in the log file.
* "2024-08-16 23:3[9-9]\|2024-08-16 23:4[0-3]": Matches timestamps from11:39 PM to 11:43 PM.
Alternative Command:
If log files are split by date:
grep "23:3[9-9]\|23:4[0-3]" /var/log/syslog.1
Step 4: Filter the Targeted Host IP
4.1: Extract IP Addresses
* After filtering the logs, isolate the IP addresses:
grep "2024-08-16 23:3[9-9]\|2024-08-16 23:4[0-3]" /var/log/syslog | awk '{print $8}' | sort | uniq -c | sort -nr
* Explanation:
* awk '{print $8}': Extracts the field where IP addresses typically appear.
* sort | uniq -c: Counts unique IPs and sorts them.
Step 5: Analyze the Output
Sample Output:
15 192.168.1.10
8 192.168.1.20
3 192.168.1.30
* The IP with themost log entrieswithin the specified timeframe is usually thetargeted host.
* Most likely targeted IP:
192.168.1.10
* If the log contains specific attack patterns (likebrute force,exploitation, orunauthorized access), prioritize IPs associated with those activities.
Step 6: Validate the Findings
6.1: Cross-Reference with the Threat Bulletin
* Check if the identified IP matches anyIoCslisted in theCCOA Threat Bulletin.pdf.
* Look for context likeattack vectorsortargeted systems.
Step 7: Report the Findings
Summary:
* Time Frame:11:39 PM to 11:43 PM on August 16, 2024
* Targeted IP:
192.168.1.10
* Evidence:
* Log entries matching the specified timeframe.
* Cross-referenced with theCCOA Threat Bulletin.
Step 8: Incident Response Recommendations
* Block IP addressesidentified as malicious.
* Update firewall rulesto mitigate similar attacks.
* Monitor logsfor any post-compromise activity on the targeted host.
* Conduct a vulnerability scanon the affected system.
Final Answer:
192.168.1.10

설명: (Fast2test 회원만 볼 수 있음)