All about Agents

• CyberCNS provides a Single Downloadable Agent which can be used as a Probe (the so-called Regular or Network Agent) OR a Lightweight Agent OR Scan Agent. You can choose the correct agent configuration based on your requirement. This document provides a way to decide which configuration is best suitable.

• Navigate to Overview and click on Probes/Agents to download the Agent.

• CyberCNS has three different types of installations that can be used depending on the requirement. These are Probe, LightWeight, and Scan.

• Choose the OS Type as Windows/ Mac/ Linux, or ARM and download the required Probes / Agents (Probe/Lightweight/Scan) and copy it into the remote machine, and run the command.

• A Probe or Network Agent is typically installed on any one machine in the network and it will scan all assets in that defined network.

• A Lightweight agent on the other hand is installed on an end-user’s system and will only scan that particular asset (useful in work-from-home scenarios when the user is not on the corporate/office network).

• The agent will behave as a Probe or Lightweight agent depending on the command line arguments passed while installation. These commands to be used for installation and are readily provided in the CyberCNS console while downloading an agent.

• CyberCNS agent uses silent installation so it is easy to push through any RMM.

• Probe & Lightweight agents pulls the same information except, lightweight does not provide with Network Scan Findings.

• For lightweight agent, if NMAP is available, it will also be able to get information about Network Vulnerabilities.

Introduction

• This document provides an overview of the various installation switches for an Agent and how they are used during the process of installation and post-installation. There are two ways:

Note: There are two executables 

🔸 cybercnsagent.exe that is used during install. 

🔹 Cybercnsagentv2.exe is the actual executable that runs the scan, is created when you run the installation or run it on an asset.

Installation Parameters

• 🔸 Cybercnsagent.exe

Post-installation

• The cybercnsagentv2.exe is located into Installation Path: C:\Program Files(x86)\CyberCNSAgentV2. It has the following parameters.

To download the agent

• On the global menu(⚙) Navigate to the Overview tab and click on Probe/Agent to install the Agent.

🔸 For successful download please follow the below steps depending on your agent selection.

To Install an agent as a probe/Lightweight Agent OR to Scan follow the below steps:-

1. Open Powershell as an administrator.

2. Use a copied command from the console to install. This contains information about your domain, company, etc.

• In case of command prompt as administrator is used please use below-highlighted part of the command only.

• Navigate to the folder where the agent is downloaded. You may want to create a new folder and copy the CyberCNS agent into it as it gets installed into the same folder.

Probe Agent

• The Probe is a Windows Service that is installed on the windows machine in the network you would be running scans on. The Windows Service runs under the local system permission but requires the following prerequisites

  • 4 core CPU on the machine

  • Minimum of 4 GB RAM for the first 1000 Assets and 1GB for every additional 500 assets.

  • Reach-ability to all the subnets needs to scan.

  • Ports 443 outbound opened to the installation domain <yourcompany>.mycybercns.com

  • Admin SMB shares permission to login into the remote system and fetch required data.

• The Probe is useful for an office environment where you have controlled IP Addressing.

• It deploys the following techniques to get to the devices

  • Windows - It attempts to use the Admin SMB share to send a small executable called the Dissolvable agent that it then runs on the remote machine to fetch the details. It probes the shares using standard SMB tools and does an NFS discovery to check any NFS shares.

  • Active Directory - It uses SMB to query the users, groups from the Credentials provided during the AD set up in the Master credentials.

  • Linux - It uses SSH credentials to log in to the box and figure out using Linux commands what is running on the machines.

  • Network Devices - It uses SNMP to discover the Sysobjectid and lookup the version of the device and then query the vulnerabilities for the version. It also connects to OEM APIs to get the vulnerability details.

• You can discover multiple subnets(CIDR/IP Range/Static IP) using a single Probe.

• The probe will require AD Credentials in the case of the AD environment for scanning purposes.

• In the Case of a Non-AD Environment, if any central system is able to communicate with the other systems in the network it solves the purpose.

🔹 Windows - the user will have permission to write and execute through SMB.

🔸 Linux, VM, Darwin- The user must have ssh access to execute the scripts and copying the files to the temp directory to execute and remove the copied files.

Installation Steps For Windows

1. Open Powershell as an administrator.

To Install as a Probe (example command-line script below).

• If the OS Type is selected as Windows, then to install the Probe Agent follow the below step:-

🔸 Select the option to install either as Probe or Lightweight or Scan, click on Download once the option is chosen, then run the command for the selected company as shown below.

• If Probe/ Lightweight is chosen then it installs the CyberCNS service into the agent system, whereas the Scan agent will only scan that system without installing a CyberCNS service. Using installed service we can use a feature of the scheduler.

To Install as a Lightweight Agent

• The below image is to download the Probe Agent by selecting the option as Lightweight agent for the selected company.

To run a scan

• Once the download is completed, select the option to Scan and run the command.

• Scan agent will help to do a one-time scan.

Uninstallation Steps for Windows(Probe & LightWeightAgent)

• To uninstall cybercnsagentv2 using command prompt

>run cmd as admin

>cd C:\Program Files (x86)\CyberCNSAgentV2

>cybercnsagentv2.exe -r

🔸 To uninstall cybercnsagentv2 using windows GUI

• Navigate to the cybercnsgentv2 folder

>cd C:\Program Files (x86)\CyberCNSAgentV2

• As depicted in the below image, click on the uninstall.bat file and follow instructions on the screen.

Lightweight Agent

• If you have an RMM deployed on the network and you are not interested in scanning network devices like in the case of a small office with a printer and broadband router then you can use the Lightweight Agent.

• The Lightweight agent can run as an executable run from the RMM or can be installed as a service.

• It collects information from the local system and pushes data to the CyberCNS portal. It does not cross the machine boundary. One weakness of this is that one does not get an outsider view of the system.

  • Ports 443 Outbound is required.

Installation Steps for Nmap

Step 1: wget https://nmap.org/dist/nmap-7.91-1.x86_64.rpm

Step 2: sudo apt-get install alien

Step 3: sudo alien nmap-7.91-1.x86_64.rpm

Step 4: sudo dpkg --install nmap_7.91-2_amd64.deb

Installation Steps For Mac

1. Download Mac/Apple agent from the company & open terminal.

2. At the terminal run >> Sudo Su

3. Navigate to the downloaded path and give executable permission for the installation script by using the below commands.

   chmod +x cybrcnsagent_darwin

To Install as a Probe

• If the OS Type is selected as Mac, then to install the LightWeight Agent follow the below step:-

🔸 Select the option to install either as Probe or Lightweight, click on Download once the option is chosen, then run the command for the selected company as shown below.

• If Probe/ Lightweight is chosen then it installs the CyberCNS service into the agent system, whereas the Scan agent will only scan that system without installing a CyberCNS service. Using installed service we can use a feature of the scheduler.

To Install as a Lightweight Agent

• The below image depicts the procedure to download the Lightweight Agent by selecting the option as Lightweight agent for the selected company.

To run a scan

• Once the download is completed, select the option to Scan and run the command.

• Scan agent will help to do a one-time scan.

Uninstallation Steps for Mac (Probe & LightWeightAgent)

• As shown in the below steps follow to uninstall the LightWeight Agent.

>>cd /opt/CyberCNSAgentV2/

>>./cybercnsagentv2_darwin -r

• To confirm the LightWeight agent is uninstalled follow the below steps.

>>cd /opt

>>ls

Linux Agent

Installation Steps for Nmap

Step 1: wget https://nmap.org/dist/nmap-7.91-1.x86_64.rpm

Step 2: sudo apt-get install alien

Step 3: sudo alien nmap-7.91-1.x86_64.rpm

Step 4: sudo dpkg --install nmap_7.91-2_amd64.deb

Installation Steps For Linux

1. Download Linux agent from the company & open terminal

2. At the terminal run >> Sudo Su

3. Navigate to the downloaded path and give executable permission for the installation script by using the below commands.

chmod +x cybrcnsagent_linux

To Install as a Probe

• If the OS Type is selected as Linux, then to install the Linux Agent follow the below step:-

🔸 Select the option to install either as Probe or Lightweight, click on Download once the option is chosen, then run the command for the selected company as shown below.

• If Probe/ Lightweight is chosen then it installs the CyberCNS service into the agent system, whereas the Scan agent will only scan that system without installing a CyberCNS service. Using installed service we can use a feature of the scheduler.

To Install as a Lightweight Agent

• The below image is to download the Docker Agent by selecting the option as Lightweight agent for the selected company.

To run a scan

• Once the download is completed, select the option to Scan and run the command.

• Scan agent will help to do a one-time scan.

Uninstallation Steps for Linux (Probe & LightWeightAgent)

• In the particular folder, where the Linux agent is installed, in the same folder uninstall the Linux agent with the following steps. In the depicted below image, can view each step as followed below.

>>cd /opt/CyberCNSAgentV2/

>>./cybercnsagentv2_linux -r

• To confirm the Linux agent is uninstalled follow the below steps.

>>cd ..

>>ls

ARM Agent(Raspberry Pi)

Installation Steps for Nmap

Step 1: sudo su

Step 2: apt update

Step 3: apt install Nmap

Installation Steps for ARM(Raspberry Pi)

1. Download ARM agent from the company & open terminal

2. At the terminal run >> Sudo Su

3. Navigate to the downloaded path and give executable permission for the installation script by using the below commands.

chmod +x cybrcnsagent_arm

To Install as a Probe

• If the OS Type is selected as ARM(Raspberry Pi), then to install the ARM Agent follow the below step:-

🔸 Select the option to install either as Probe or Lightweight, click on Download once the option is chosen, then run the command for the selected company as shown below.

• If Probe/ Lightweight is chosen then it installs the CyberCNS service into the agent system, whereas the Scan agent will only scan that system without installing a CyberCNS service. Using installed service we can use a feature of the scheduler.

To Install as a Lightweight Agent

• The below image is to download the ARM Agent by selecting the option as Lightweight agent for the selected company.

To run a scan

• Once the download is completed, select the option to Scan and run the command.

• Scan agent will help to do a one-time scan.

• ARM is architecture but OS is Linux, so in the Agent Platform it shows as Linux, and successful agent installation is shown as depicted in the below image.

Uninstallation Steps for ARM(Probe & LightWeightAgent)

• As shown in the below steps follow to uninstall the ARM Agent.

>>cd /opt/

>>ls

>>cd /opt/CyberCNSAgentV2/

>>ls

>>./cybercnsagentv2_arm -r

Probe/Agents Tab

• Once the agent installation is successful, Navigate to the Probe / Agents tab to view the installed agent along with the details of Hostname, Version, Agent Type, IP, OS Type, Installed On, Last Scanned Time, Last Ping Time, and whether the agent is Online (If the agent is online it shows in green) or Offline (if the agent is offline it shows in red).

• In the below image using the Action column can add Discovery settings, Uninstall and Delete the agent if needed.

• Full Scan, Asset Scan, Vulnerability Scan, External Scan, Port Scan, and Firewall Scan are the scan that is available on the top of the page, where the scan for the agent can be done using these options on the requirement.

• After a scan is complete, it will successfully upload the results to the company from where this agent was downloaded under the Assets section.

AV/EDR Exclusion

CyberCNS agents to be whitelisted into AV or EDR solutions.

• Please exclude C:\ProgramFiles (x86)\CyberCNSAgentv2 folder from the Agent machine ( For Probe as well as Lightweight Agent).

• Please exclude\tmp\cybercnsagent folder from remote machines (which are scanned using Probe Agent)

Windows

🔸 Agent installed path:

C:\Program Files (x86)\CyberCNSAgentV2

🔹 Logs path:

C:\Program Files (x86)\CyberCNSAgentV2\logs

🔸 Remote Execution path:

>> net share admin$ (If we run this cmd we can get the admin share path. CyberCNS Probe agent will send the executables to the admin share path.

Linux and Mac

🔸 Agent installed path:

/opt/CyberCNSAgentV2/

🔹 Logs path:

/opt/CyberCNSAgentV2/logs/

🔸 Remote Execution path:

/tmp/cybercnsagent (CyberCNS Probe will send executables to /tmp path in linux machines scanning)

Debug Mode Command:-

In Windows

1. Open CMD or Powershell as administrator

2. Run "net stop cybercnsagentv2"

3. Run "cd C:\Program Files (x86)\CyberCNSAgentV2"

4. cybercnsagentv2.exe -m Probe -d

Debug Mode Command:-

In Linux

-->open terminal with privileged user

1. sudo su

2. systemctl stop cybercnsagentv2

3. cd /opt/CyberCNSAgentV2

4. ./cybercnsagentv2_linux -m Probe -d
   
   Debug mode for LighWeight Agent

5. ./cybercnsagentv2_linux -t LightWeight -d

Below are the primary executables in the CyberCNSAgentV2 (installation folder) to be whitelisted.

​cybercnsagent.exe
cyberutils.exe
nmap.exe
osqueryi.exe
ntfsfastfind-x64.exe

Proxy support for agent

Please add below in the installation command shown under Probes/Agents section:

-p username:password@IPaddress:port

e.g. -p charu:hash1234@34.219.214.153:3128

Please follow above steps of respective agents to Install as a LightWeight/Probe Agent for Windows, MAC, Linux or ARM.

Tags support for LightWeight Agent