Network Security Essentials - Virus Scan Tips

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Explore network security essentials by implementing proactive virus scans to protect against evolving cyber threats and ensure safety.

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Network Security Essentials

Ensuring network security is essential for both companies and individuals.


As cyber threats, such as viruses and malware, continue to advance, it becomes increasingly important to implement proactive strategies for threat detection and management.


One of the most efficient methods for identifying and removing harmful software from your network is by conducting a comprehensive virus scan.


A network virus scan utilizes specialized antivirus software or network security tools to seek out known viruses, malware, ransomware, and various other malicious codes throughout your network.


This examination is crucial in pinpointing infected devices, recognizing weak entry points, and detecting unauthorized activities within your system.


By performing regular scans, you not only safeguard your devices and sensitive data but also help prevent potential data breaches, service interruptions, and damage to your reputation.


This article will guide you through executing a network virus scan, covering everything from choosing the appropriate antivirus solution to setting up scan schedules and understanding the results.


We will explore both manual and automated scanning techniques, share best practices for thorough scans, and provide advice on how to address any identified threats.


Upon completing this guide, you will be equipped with the knowledge to routinely conduct effective virus scans, protecting your organization or personal network from emerging cyber threats and maintaining the integrity of your digital landscape.


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Dealing with network viruses involves a more intricate approach compared to traditional viruses. While standard antivirus solutions can effectively manage individual device threats, network viruses present unique challenges as they propagate through network traffic, eluding typical detection methods.


When a network virus infiltrates a system, it can create significant issues such as decreased network performance, data breaches, and device malfunctions, ultimately leading to downtime. Thus, network administrators must employ specialized strategies to combat these threats.


To identify network viruses, administrators should utilize tools such as packet sniffers or intrusion detection systems (IDS). These tools scrutinize network traffic to uncover malicious packets and other irregular activities that signify a potential infection.


Here are some recommended packet-sniffing tools:


  • SolarWinds Network Performance Monitor : This on-premise solution identifies all devices connected to the network and maintains an inventory, featuring a built-in packet sniffer. It operates on Windows and offers a 30-day free trial.


  • Paessler PRTG Network Monitor : This software scans networks to produce an inventory and visual map, including a packet sniffing capability. It can be installed on Windows Server or accessed as a cloud-based solution.


  • ManageEngine NetFlow Analyzer : Compatible with Windows Server and Linux, this tool captures packets for protocol analysis by examining the headers' port information.


For those looking for effective intrusion detection systems, consider these options:


  • SolarWinds Security Event Manager : A comprehensive log collector and analyzer, this tool comes with predefined searches for security threats. A 30-day free trial is available for download.


  • ManageEngine Log360 : This SIEM (Security Information and Event Management) solution aggregates data from both network and endpoint sources to detect unusual activities across your IT infrastructure. It is available for Windows Server and offers a 30-day free trial.


  • CrowdStrike Falcon : A hybrid security tool that functions both as an antivirus on devices and as a centralized activity monitor in the cloud. It supports multiple operating systems including Windows, macOS, and Linux.


By leveraging these tools and strategies, network administrators can effectively safeguard their networks against the pervasive threat of network viruses.Wireshark serves as a powerful tool for monitoring network traffic, accessible on Windows, macOS, and Linux platforms.


This packet sniffing application enables you to detect and analyze potentially harmful activities on your network.


To kick off your network analysis, select the interface you wish to monitor carefully.


For instance, if you are interested in Wi-Fi traffic, simply double-click on the Wi-Fi option listed under the capture menu.


Once activated, Wireshark will begin gathering packets in real-time, showcasing various details including time stamps, source and destination addresses, protocols in use, and additional metadata.


You can halt the packet capture at any time by clicking the red stop button located in the upper left corner of the interface.


To effectively interpret the captured data, employing packet filters is essential.


These filters allow you to narrow down the display information according to specific criteria.


Utilize the filter box at the top of the screen to input your desired parameters.


This is particularly beneficial for isolating suspicious packets; for example, you can track traffic associated with a particular IP address.


To view packets originating from a specific IP address, use the following filter format (adjust the IP address as needed):


ip.src == 192.788.53.1


Conversely, to monitor packets directed toward a specified IP address, input:


ip.dst == 192.788.53.1


If you need to analyze both incoming and outgoing traffic for a specific address, combine the filters like this:


ip.src == 192.788.53.1 or ip.dst == 192.788.53.1


You can also filter based on the type of protocol by entering the desired protocol into the filter bar.


For example, to focus on DNS traffic, simply type the following, but remember, you can apply this to other protocols such as DHCP, ICMP, or TCP as well.


Monitoring specific IP addresses in this way helps you observe interactions between devices, which is crucial if you suspect malware infection.


Regularly reviewing the traffic generated by high-volume hosts can reveal potential infections, as these machines may be attempting to spread malware.


Additionally, be vigilant for traffic directed to or from unusual locations, or any hosts exhibiting abnormal traffic patterns.


To detect such irregularities effectively, capturing a baseline of your typical network activity is vital; this will enable you to identify deviations more clearly.For a comprehensive guide on utilizing Wireshark, be sure to check our detailed post on the Wireshark network protocol analyzer.


Performing a thorough virus scan with antivirus software is crucial for identifying harmful components like malware and viruses that may have compromised your device. The network traffic that flows into your system serves as a primary access point, and vigilant monitoring of this entry can facilitate rapid response to any threats that may infiltrate your defenses.


Packet sniffers play a vital role in this process, as many antivirus solutions find it challenging to identify network-based viruses that disseminate across various devices. Tools such as Wireshark and Snort empower you to detect unusual connections within your network, enabling you to investigate and mitigate potential threats effectively.


By integrating ongoing packet sniffing with standard antivirus scans, you can enhance your network's security and fortify it against a wider array of threats. This combination substantially lowers your vulnerability to online risks.


An Intrusion Detection System (IDS) is a specialized software designed to identify unauthorized attempts to access your network. IDS tools can recognize intrusion efforts, including malware, viruses, trojans, or worms, and alert you when an attack is underway. Notable IDS solutions that can help you monitor for potential threats include Snort and Nmap.


IDS are particularly beneficial as they can detect early indicators of a cyber attack. For instance, before executing an attack, many hackers often perform port scans to identify vulnerabilities. With a tool like Snort, you can recognize port scanning activities, providing you with early warnings before any harm is inflicted on your network.


IDS solutions employ both signature-based and anomaly-based detection techniques for attack identification. Signature-based IDS look for known malicious patterns within traffic, while anomaly-based IDS utilize machine learning to identify irregular behaviors and alert users accordingly.


Among these methods, anomaly-based IDS are generally more proficient at detecting unknown viruses and malware. In contrast, signature-based tools require frequent updates to maintain their effectiveness and often falter against newly emerging zero-day vulnerabilities.


Both packet sniffers and IDS are instrumental in uncovering malicious activities on the network and share many similarities. However, the main distinction lies in the fact that an IDS functions as an advanced packet sniffer equipped with anomaly detection capabilities, allowing it to recognize harmful traffic patterns and notify users when suspicious activity is detected.One effective way to safeguard your network is by utilizing specialized tools designed for virus scanning.


For instance, Snort allows users to establish customizable traffic rules that help in the detection of malicious code.


On the other hand, tools like Wireshark, which are primarily packet sniffers, lack built-in alert systems. This means that users must manually sift through collected packets to spot any suspicious activity.


While Intrusion Detection Systems (IDS) excel in automating the detection of threats and responding to them, packet sniffers are still invaluable for analyzing and tracing malicious traffic trends.


In summary, both Wireshark and Snort serve as practical options for identifying malicious traffic and securing your network from potential threats.


In our examination of network protection solutions, we assessed various tools based on specific criteria:


  • Availability of deep packet inspection tools alongside Security Information and Event Management (SIEM) systems.


  • Options for both on-premises and cloud-based hosting solutions.


  • Capabilities for automated threat detection and scanning.


  • Features that allow for manual threat analysis.


  • Additional functionalities for network monitoring.


  • Availability of a free trial to evaluate the software prior to purchase.


  • Overall cost-effectiveness and the value offered in relation to the services provided.


If you're exploring other packet-sniffing tools to enhance your network monitoring, there are numerous options available. Below is a selection of some of the best free and paid alternatives to Wireshark.


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SolarWinds Network Performance Monitor is a comprehensive paid tool designed for effective network monitoring.


It features a real-time network packet sniffer integrated into its user-friendly dashboard, allowing users to keep track of network traffic seamlessly.


You can analyze data volumes and transactions per application, making it easier to pinpoint bandwidth-heavy applications quickly.


This software is compatible with Windows, and you can explore its capabilities with a 30-day free trial.


Highlighted Features:


  • Discovery of network devices


  • Inspection of network packets


  • Analysis of protocols


  • Detection of unauthorized devices


  • On-premises deployment


SolarWinds Network Performance Monitor excels at polling all devices in a network to identify status issues.


Utilizing the Simple Network Management Protocol (SNMP), it communicates with agents installed on devices to gather status updates.


Moreover, this package provides opportunities for detailed packet scanning to facilitate protocol analysis, specifically designed for Windows Server environments.


SolarWinds tools are tailored for larger enterprises that prefer not to rely on cloud services.


All major monitoring and management applications from SolarWinds operate on a unified platform known as Orion, allowing users to manage all purchased tools from one central dashboard.


Key Benefits:


  • In-depth packet inspection capabilities


  • Configurable alert systems


  • Seamless integration with SolarWinds NetFlow Traffic Analyzer


  • Automated network monitoring processes


  • Continuous updates of network inventory


  • No cloud-based version available


SolarWinds Network Performance Monitor is recommended as the top choice for packet sniffing due to its ability to discover and document all network-connected devices.


Part of its system management function includes creating an updated network topology map.


The tool continually refreshes both the network inventory and topology map, highlighting any rogue devices that may connect.


Unusual traffic patterns can be swiftly detected through its packet inspection and protocol analysis features, and users can set up customized alerts to receive notifications of any anomalies.


Try it out: Access a 30-day free trial


Visit the official site for more information: https://www.solarwinds.com/registration/network-performance-monitor/registration


Operating System: Windows Server


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Network Monitoring Solutions Overview

Paessler PRTG Network Monitor offers a robust solution for monitoring network traffic, including IP, UDP, and TCP.


With its packet sniffer sensor, users can keep an eye on various protocols such as IRC, AIM, Citrix, FTP, P2P, DHCP, DNS, ICMP, SNMP, IMAP, POP3, SMTP, NetBIOS, RDP, SSH, VNC, HTTP, HTTPS, and more.


This versatile tool is compatible with both Windows and Mac operating systems.


Key capabilities of PRTG include:


  • Discovery of network devices


  • Packet sniffing capabilities


  • Inventory management and network mapping


  • In-depth protocol analysis


PRTG is designed to oversee not just networks but also servers and applications. Users have the flexibility to choose which monitoring tools, known as sensors, they wish to activate. The system contains features for packet sniffing and protocol analysis, along with a customizable alert system to ensure timely notifications.


This software package caters to a broad audience, offered as a traditional Windows server application or as a SaaS cloud platform. Pricing is determined by the number of activated sensors, with free usage available for up to 100 sensors.


Additional benefits include:


  • Detection of irregular traffic patterns


  • Ongoing scans of network devices


  • Identification of unauthorized devices


  • Flexibility for on-premises or cloud deployment


  • Note that it does not function as a security monitoring system


You can easily download the software at no cost.


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ManageEngine NetFlow Analyzer is a commercial tool designed for monitoring network bandwidth usage effectively.


This software allows real-time tracking of interface bandwidth and traffic behaviors.


With its advanced security analytics feature, users can analyze security events and monitor anomaly occurrences.


It is compatible with both Windows and Linux operating systems, and you can try it for free by downloading a trial version.


Key Features Include:


  • Traffic analysis capabilities
  • Support for various flow protocols
  • In-depth packet inspection

The ManageEngine NetFlow Traffic Analyzer serves as a packet tracking and traffic evaluation solution, aimed at preventing overload on routers and switches.


It can identify unusual traffic patterns, including spikes directed at specific ports and endpoints, and users can configure alerts for such anomalies.


This system is available for installation on Windows Server and Linux, as well as being offered as a SaaS (Software as a Service).


It effectively detects excessive traffic categorized by protocol, source, or destination, making it useful for capacity planning.


This tool is particularly beneficial for medium to large enterprises.


Additional Features Include:


  • Identification of excessive traffic per protocol
  • Packet header analysis
  • Protection against network device overload
  • Lacks remediation mechanisms

For further insights, check out our related article on the top packet sniffers.


You can also explore intrusion detection systems in our informative piece titled "Intrusion Detection Systems Explained: A Review of the Best IDS Software Tools." If you're short on time, we've summarized the three best options for you.


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SolarWinds Security Event Manager (SEM) is primarily designed as a host-based intrusion detection solution, but it can be enhanced to function as a network-based intrusion detection system by integrating with Snort's network security monitoring outputs. This software package operates on Windows Server and effectively processes log files from various operating systems, including Unix, Linux, macOS, and Windows. For those interested, a 30-day free trial is available for evaluation.


Key Capabilities:


  • Log Management : Efficiently organizes and archives log data.


  • Threat Detection : Proactively hunts for potential security threats.


  • Log Analysis Tools : Offers a comprehensive suite for examining log files.


SolarWinds SEM excels in log management and security scanning functions. It meticulously scans logs for any signs of threats while providing a data viewer equipped with manual analysis tools. The system generates network traffic reports and will issue alerts upon detecting viruses or suspicious human activity.


This solution is particularly well-suited for larger organizations with intricate systems. It aggregates data from various sources such as operating systems, software applications, network devices, and firewalls. Additionally, it can execute automated remediation actions to neutralize threats, delivering a robust defense against both manual and automated attacks.


  • Centralizes Log Data : Effectively consolidates and organizes log messages.


  • Analytical Data Viewer : Provides tools for in-depth analysis.


  • Automated Threat Hunting : Streamlines the process of identifying threats.


  • No Cloud Deployment : This package does not offer a cloud-based version.


To explore its features, consider downloading the 30-day free trial of SolarWinds Security Event Manager.


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ManageEngine Log360 is a comprehensive suite of security tools designed for effective network and data protection.


This robust package integrates various functionalities, including:


  • Active Directory monitoring and security
  • Log management
  • Security Information and Event Management (SIEM)

Log360 excels in tracking user activities, which is crucial for identifying potential insider threats and account takeovers. Within its SIEM component, there is a dedicated intrusion detection service that enhances security measures.


The standout features of Log360 include:


  • Detailed log analysis
  • Proactive threat hunting
  • Efficient log management

By aggregating system activity data from all devices, including network hardware and endpoints, Log360 can effectively identify suspicious activities that may indicate malware presence or unauthorized access. The solution also implements strategies to mitigate insider threats and protect against account compromises.


This extensive toolset is particularly beneficial for organizations striving to maintain compliance with various regulations such as PCI DSS, GDPR, FISMA, HIPAA, SOX, and GLBA.


Key functionalities include:


  • Scanning for threats based on comprehensive system activity
  • User behavior analytics to detect insider threats
  • Compliance management features

Be aware that Log360 is a large toolkit; thus, not all modules may be necessary for your specific needs.


The software is compatible with Windows Server, and most features can also be acquired individually. Interested users can explore the ManageEngine module list to select the components that best fit their requirements.


A 30-day free trial is available for those wanting to explore the capabilities of ManageEngine Log360.


Start your 30-day free trial of ManageEngine Log360 today!


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CrowdStrike Falcon is an advanced security solution that operates through a cloud-based framework, utilizing data from its core product, Falcon Prevent.


Falcon Prevent serves as an endpoint protection tool, employing techniques such as antimalware and intrusion detection to identify unusual activities on devices. By analyzing the reports generated, users gain critical insights into potential network threats.


Key attributes of this system include:


  • A hybrid security approach


  • Robust endpoint protection capabilities


  • Centralized cloud management


The Falcon system offers a comprehensive multi-layered security model, integrating next-gen antivirus across endpoints, while a cloud controller examines the data for any possible threats. Expanding the system is straightforward; simply install Falcon Prevent on any new endpoint to enhance protection.


This service is well-regarded among major corporations, though its pricing may be a barrier for smaller entities. Mid-sized companies might also find the costs somewhat prohibitive.


  • An endpoint solution that functions independently of network connectivity


  • Access to exclusive threat intelligence across the organization


  • Proactive alerts for strengthening endpoint security


  • Higher price point


CrowdStrike provides a 15-day free trial for Falcon Prevent, allowing potential users to evaluate its features.


Conducting scans for both conventional and network viruses is crucial for safeguarding your digital environment and thwarting malware incidents. Staying informed about potential risks and consistently scanning enhances your defense against evolving online threats.


Here are some recommended practices:


Ensure regular backups of your files, which is fundamental for disaster recovery. This step protects against viruses and other disruptions such as hardware failures or environmental incidents, keeping your data safe even amidst persistent threats.


If you suspect a device has been compromised, immediately disconnect it from the internet. This action prevents the affected system from communicating with external sources, aiding in containment and facilitating a more efficient recovery process.


Establishing a routine for security scans is vital to uncover new threats. While occasional scans can help identify existing issues, they may overlook subsequent security breaches. Regular scanning ensures ongoing protection for your devices.After conducting a network virus scan, it's crucial to ensure that you've taken all necessary steps to eliminate any threats detected. Most scanning tools will provide detailed reports that outline how to handle infected files. Adhering to these guidelines is essential for implementing the required changes to safeguard your system.


Although antivirus programs cannot offer protection against every online threat, they are vital in defending your devices from many prevalent risks. Performing regular network scans is an effective strategy to reduce your vulnerability to cyber threats.


Establish a routine for scanning your systems to remain informed about potential security risks. If you discover that a device has been compromised, immediately disconnect it from the internet and isolate the malicious software. This will give you the necessary time to address the problem. Additionally, ensure that the virus is not lurking in your backup files before you restart the system.


A "network virus" is defined as a type of fileless malware that propagates from one computer to another without leaving files on any device, directly infiltrating the operating system. This makes detection challenging, as these threats do not have physical files to identify; they can only be recognized through network packets and active processes. Itโ€™s important to note that when people mention a "network virus scan," they typically refer to a scan that checks each device connected to the network.


Rather than scanning each individual endpoint, analyzing network traffic for viruses requires inspecting the packets transmitted across the network. The most effective type of security software for this purpose is a Network-based Intrusion Detection System (NIDS). This system inspects packets for known patterns that suggest unusual activity, enabling the detection of unauthorized access and network-based viruses.


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