CCOA Exam Dumps : ISACA Certified Cybersecurity Operations Analyst

To determine thedate the webshell was accessedfrom theinvestigation22.pcapfile, follow these detailed steps:

Step 1: Access the PCAP File

Log into the Analyst Desktop.

Navigate to theInvestigationsfolder on the desktop.

Locate the file:

investigation22.pcap

Step 2: Open the PCAP File in Wireshark

LaunchWireshark.

Open the PCAP file:

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File > Open > Desktop > Investigations > investigation22.pcap

ClickOpento load the file.

Step 3: Filter for Webshell Traffic

Since webshells typically useHTTP/Sto communicate, apply a filter:

http.request or http.response

Alternatively, if you know the IP of the compromised host (e.g.,10.10.44.200), use:

nginx

http and ip.addr == 10.10.44.200

PressEnterto apply the filter.

Step 4: Identify Webshell Activity

Look for HTTP requests that include:

Common Webshell Filenames:shell.jsp, cmd.php, backdoor.aspx, etc.

Suspicious HTTP Methods:MainlyPOSTorGET.

Right-click a suspicious packet and choose:

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Follow > HTTP Stream

Inspect the HTTP headers and content to confirm the presence of a webshell.

Step 5: Extract the Access Date

Look at theHTTP request/response header.

Find theDatefield orTimestampof the packet:

Wireshark displays timestamps on the left by default.

Confirm theHTTP streamincludes commands or uploads to the webshell.

Example HTTP Stream:

POST /uploads/shell.jsp HTTP/1.1

Host: 10.10.44.200

User-Agent: Mozilla/5.0

Date: Mon, 2024-03-18 14:35:22 GMT

Step 6: Verify the Correct Date

Double-check other HTTP requests or responses related to the webshell.

Make sure thedate fieldis consistent across multiple requests to the same file.

Answer:

2024-03-18

Step 7: Document the Finding

Date of Access:2024-03-18

Filename:shell.jsp (as identified earlier)

Compromised Host:10.10.44.200

Method of Access:HTTP POST

Step 8: Next Steps

Isolate the Affected Host:

Remove the compromised server from the network.

Remove the Webshell:

rm /path/to/webshell/shell.jsp

Analyze Web Server Logs:

Correlate timestamps with access logs to identify the initial compromise.

Implement WAF Rules:

Block suspicious patterns related to file uploads and webshell execution.

AnIT security specialistis responsible forperforming routine vulnerability scansas part of maintaining the organization's security posture. Their primary tasks include:

Vulnerability Assessment:Using automated tools to detect security flaws in networks, applications, and systems.

Regular Scanning:Running scheduled scans to identify new vulnerabilities introduced through updates or configuration changes.

Reporting:Analyzing scan results and providing reports to management and security teams.

Remediation Support:Working with IT staff to patch or mitigate identified vulnerabilities.

Other options analysis:

A. Incident response manager:Primarily focuses on responding to security incidents, not performing routine scans.

B. Information security manager:Manages the overall security program but does not typically conduct scans.

C. IT auditor:Reviews the effectiveness of security controls but does not directly perform scanning.

CCOA Official Review Manual, 1st Edition References:

Chapter 6: Vulnerability and Patch Management:Outlines the responsibilities of IT security specialists in conducting vulnerability assessments.

Chapter 8: Threat and Vulnerability Assessment:Discusses the role of specialists in maintaining security baselines.

System hardening involvesdisabling unnecessary features and enabling only required capabilitiesto reduce the attack surface:

Minimizing Attack Vectors:Reduces potential entry points by disabling unused services and ports.

Configuration Management:Ensures only essential features are active, reducing system complexity.

Best Practice:Hardening is part of secure system configuration management to mitigate vulnerabilities.

Incorrect Options:

A. Multiple users completing a task:More related to separation of duties, not hardening.

B. Permitting only required access:Relevant for access control but not directly for system hardening.

C. Giving users only necessary permissions:Reduces privilege risks but does not reduce the system attack surface.

Exact Extract from CCOA Official Review Manual, 1st Edition:

Refer to Chapter 4, Section "System Hardening Techniques," Subsection "Minimal Configuration" - Hardening involves enabling only necessary system functions to reduce risks.