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VAPT < Network

Overview : Network Penetration Testing

A network vulnerability assessment and penetration test, or network VAPT, is a technical security assessment that moves beyond allowable port scanning and vulnerability enumeration to see risks to security and the business impact on that organization's network, regardless if its the wireless or the internal network or external. Network Security Testing is an essential action to assess vulnerabilities, weaknesses of a network, potential target threats that hackers can compromise on an organizations networks, servers, and applications if a hacker gains exploit level access. It is a critical component to assess how secure a network based on its goals, objectives, and functions, including the simulation of attacks, and the unauthorized access of a target network to confirm the state of a network's security posture.

Methodology

Black Box
Gray Box
White Box

Black Box, also called behavioral or external testing, is a software testing technique in which the internal code structure, implementation details, and internal paths of an application are not known. The emphasis is on the application's input and output which is entirely reliant on the specifications and requirements for the software.

Gray box testing is a software testing method that combines black box and white box testing. Gray box testing is used to test an application without needing to have a specific knowledge of the underlying code. Instead, it looks for faults caused by poor code structure within a context.

White Box testing evaluates a software's internal structure, coding and architecture to check the input-output flow in the software and improve the design, security and functionality of the program. It is also known as Internal testing, Clear box testing, Open box testing and Glass box testing because the testers are able to see the code.

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Benefits

  • Cost Saving
  • Adherence to Compliance
  • Reduced Outage 
  • Risk Management

Our Approach

Define Scope
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Before conducting an application assessment, the client's scope of work needs to be clarified. During this time, it is beneficial to encourage open communication between the business and the client in order to establish a safe platform on which to conduct assessments.

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At this stage, a variety of OSINT (Open Source Intelligence) tools and tactics are in play to collect as much information as possible on the target. The information collected will help us understand how the relationship works which will allow us to accurately assess the risk as it evolves.

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At this time, we combine computerized resources and tools with different methods of data collection to make more sophisticated data. All proposed attack vectors are subject to review by our experts, and the next step will be to use the data that we have acquired to apply it.

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We perform both a manual and an automatic security scan in this state to find all possible attack paths and vulnerabilities. Then we carry out a set of exploits against the application to validate the security of the application. We perform penetration utilizing a high level of a variety of techniques, custom and open-source scripts, and our internal tools. All of this is accomplished to provide security for your application and your data.

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This is the final step in the entire assessment process. This step involves collecting all the information we have obtained, analyzing it as necessary, and supplying the client with a full, complete summary of our results. The full report will include a full assessment of all of the hazards and the final report will also include a list of all of the strengths and weaknesses of the application.

Overview : Switches and Router VAPT

Switches and routers are the substratum of your organization's network. If an attacker compromises them, the door is wide open, offering the attacker with direct access to important data, sensitive internal systems, and critical operations. Switches and Router VAPT is a focused security service that finds vulnerabilities in your network devices, emulates an attack in reallife situations, and gives you actionable remediation steps. Our expert security team attempts to make sure your network devices are free of misconfigurations, are not impacted by outdated firmware, do not have weak authentication mechanisms, and do not have exploitable vulnerabilities. By securing your switches and routers you are securing the entry points for your network, eliminating interruptions to your network and maintaining compliance with specific industry regulations.

Methodology

Switches and routers are the backbone of any organization’s network; therefore, they are ideal targets for cyberattacks. Our Switches & Router Vulnerability Assessment & Penetration Testing (VAPT) service allows you to look for security gaps, misconfigurations, targeted attack paths, and areas of weakness that can put your organization at risk before bad actors can exploit them.Switches and routers are fundamental components of the network infrastructure of any organization, serving as gateways for data flow and enabling communication between systems. Because of their important position, they are also highly sought after by cybercriminals trying to disrupt business operations, perform data exfiltration, or gain unauthorized.

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Benefits

  • Prevents Network Breaches
  • Enhances Device Security
  • Ensures Compliance
  • Improves Performance
  • Reduces Downtime Risks
  • Strengthens Incident Response

Our Approach

IInformation Gathering
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Collect device details, firmware versions, and network topology.

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Analyze access control lists (ACLs), VLAN segmentation, SNMP settings, and routing tables.

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Identify known CVEs, weak passwords, outdated firmware, and insecure protocols.

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Simulate attacks such as privilege escalation, DoS, ARP spoofing, and SNMP enumeration.

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Assess the real-world risk of identified vulnerabilities.

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Confirm all fixes are implemented effectively.

Overview : Firewall,IDS & IPS VAPT

In today's cyber threat landscape, securing your network cannot be limited merely to having security devices. While firewalls, Intrusion Detection Systems (IDS), and Intrusion Prevention Systems (IPS) are necessary, the devices must be routinely tested for configuration errors, effectiveness, as well as the ability to withstand ever-changing attacks. At Critical Shield, we will provide a Firewall, IDS & IPS Vulnerability Assessment and Penetration Testing (VAPT) service that will uncover configuration gaps, rule-set flaws, and potential bypass capabilities of an attacker.

Our Testing Methodology

Understanding your network architecture and security objectives

Mapping firewall and IDS/IPS deployments

Using advanced tools and manual techniques

Safely demonstrating real-world attack scenarios

Delivering a clear, prioritized action plan

Benefits of Our Firewall, IDS & IPS VAPT

  • Strengthen perimeter and internal network defenses
  • Detect gaps before attackers find them
  • Improve compliance with global cybersecurity standards
  • Enhance alert accuracy and reduce false positives
  • Ensure configurations match your business risk profile

Our Testing Approach

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Review of access control lists, NAT rules, and segmentation policies Testing against port scans, DoS attempts, and spoofed traffic Validation of inbound/outbound traffic filtering.

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Simulation of known and emerging attack patterns Evasion technique testing (fragmentation, obfuscation, encoding) Detection capability validation against real-world exploits

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Safe exploitation to validate actual risk levels Identification of weak authentication and monitoring gaps

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Detailed vulnerability report with CVSS scoring Actionable remediation steps for administrators and network engineers

Overview : IoT Security Testing

The testing of cloud-connected devices and networks involves evaluating the vulnerabilities related to cloud-connected devices and networks to take precautionary measures against unauthorized access and/or exploitation. Organizations are able to reduce risks and optimize device protection by adopting well-planned testing methods and considering some of the major IoT security challenges.

IoT Security Testing Methodology

Planning

Planning

In this step, the scope, objectives, and limitations of the test are defined.

Information Gathering

Information Gathering

Gather information on the device, network, and possible access points.

Vulnerability Analaysis

Vulnerability Analysis

Detect and assess vulnerabilities using manual evaluation.

Exploitation

Exploitation

Test identified vulnerabilities to assess their potential impact.

Post Exploitation

Post Exploitation

Evaluate the level of control gained and the possibility of lateral movement within the network.

Reporting

Reporting

Findings are recorded, risks are evaluated and mitigation strategies are suggested in the report.

Approach to IoT Security Testing

There are target size considerations that pentesters need to understand. The scope is the limitations and restrictions. The requirements for penetration testing provide details on the requirements of pentesting for the product. Therefore, the tester needs to know the scope and prepare accordingly using the scope during step one of IoT security testing.

In this stage, the tester identifies the possible means by which an attackers could gain unauthorized access. The method consists of studying the hardware, software, and communications of the device to identify potential avenues of attack. Additionally, this step goes beyond identifying vulnerabilities. The act of developing an architecture diagram provides a visual reference of the system components and relationships. Security experts look for ways to mitigate exposure to weaknesses, and the architecture diagram helps provide clarity.

After understanding the attack surface, the next step is vulnerability assessment and exploitation. Testers will exploit the flaws identified previously, simulating real-world cyberattacks to assess exposure and risk. Attackers can introduce weaknesses in unsafe communication protocols, such as I2C, SPI, or JTAG, to corrupt hardware or reverse engineer firmware or software. Other issues may result from hard-coded sensitive values or weak data storage protection. This phase validates what the impact was based on these vulnerabilities, and helps craft the appropriate mitigations.

The last activity is documentation and reporting, where testers usually include a comprehensive report that summarizes findings, impacts, and methods of exploitation. Testers include both technical and non-technical perspectives, along with proof of concepts, demos, and code snippets. The report provides actionable recommendations that not only fix existing vulnerabilities, but also secure the device itself. In some circumstances a follow up assessment may be needed to confirm fixes are effective, and not introducing new vulnerabilities.

Benefits

  • Enhancing security measures
  • Reducing operations cost
  • Achieving customer centricity
  • Using smart devices

Types of IoT Security Testing

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IoT Penetration Testing

Security assessors identify and exploit security vulnerabilities in IoT devices using a security testing methodology called IoT penetration testing. IoT penetration testing assesses security in IoT devices in a real world scenario. For security penetration testing we mean real world examination of an entire IoT system not just the device or software.

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Threat Modeling

The systematic approach taken by threat modeling is to identify and catalogue potential risks (e.g., gaps in defenses or absence of defenses) and prioritize security mitigations. Threat modeling provides the defense force/security team with an itinerary for security controls proportionate to the threat environment, with respect to the security controls rget systems.

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Firmware Analysis

Realizing that firmware is software, just like a program or application on a computer, is probably one of the most important ideas to understand. The only difference is that firmware is this software used on embedded devices, which are tiny computers doing a specific job: an embedded device could be a smartphone, a router, or even a heart monitor.