Sandboxes: What are They and When to Use Them?


Sandboxes: What are They and When to Use Them?

Sandbox is a test environment platform specifically built to test only risky code. Before an application or a website is launched, the product is tested to ensure that it performs well and is also free from any security issues. To achieve these tests, the product is tested in a test environment, which runs the necessary tests to ensure the application’s performance.

What is a Sandbox?

A sandbox environment is a virtual machine that can run potentially dangerous software code without disrupting network resources or local applications in cybersecurity.

Cybersecurity researchers use sandboxes to run suspicious programs from unknown attachments and URLs and examine how it behaves. 

The red flags are noticed when the program

  • tries to contact a command-and-control site
  • instals further software
  • code duplicates itself.

Sandboxes are akin to confined areas where militaries test their explosive weapons to ensure that they function correctly without harming other living things. Because it is a virtual environment with no network, data, or other apps, security teams can safely run code to see how it works and whether it is harmful.

Though sandboxing was created to test dangerous code, developers also use it to execute code before it is released to the general public.

What is the Purpose of a Sandbox?

Malware and cybersecurity issues are a never-ending problem for every company and developer. Even the tiniest change to the code, or the introduction of external malicious code, can completely degrade the code’s performance.

Sandboxes are essential in various development, cybersecurity, and research contexts. Because malware continuously and aggressively explores the network for exploitable flaws, ensuring it is genuinely isolated and secure is more critical in cybersecurity research than software development.

Searching for user interactions that aren’t consistent with real-world usage could be one of the sandbox detection strategies. Others could look through the system settings for standard virtual machine configurations. The malware remains inactive until it reaches a real-world victim in some circumstances, preventing it from being recognized as harmful.

How Does it Work?

The way it works varies depending on the purpose for which the program is being tested. It is created in a certain way if the environment is supposed to test for malware. It must be isolated from production software to research suspected malware and execute dangerous code.

Regardless of how a sandbox is used, it has a few common characteristics:

  • An Actual Device Is Replicated

Virtualization of a desktop or mobile device is one example. The tested program must have the same CPU, memory, and storage resources as the code being analysed in either scenario.

  • The Target Operating System Is Simulated

The program must access the operating system while using a virtual machine. The sandbox is insulated from the underlying physical hardware of a virtual machine, but it has access to the installed operating system.

  • Virtualized Environment 

A sandbox is usually installed on a virtual system so that it can access virtualized hardware but not actual resources.

Sandbox Uses 

Sandboxes are critical in the testing of software to detect malware threats. Here are some examples of how sandboxes can be used to learn more about them:

In Development

A sandbox in development usually consists of a development server and a staging server. Although the development server is isolated from the production environment, it may require internet connectivity. Developers use this server to upload and test code as the codebase evolves.

A staging server is intended to be a carbon copy of the production server. Before deploying code to production, quality assurance (QA) tests it on this server. Because the staging and production environments are identical, code that works flawlessly in staging should also work flawlessly in production. The code is then pushed to production after it has been thoroughly tested.

In Cybersecurity Research

Researchers and analysts in the field of cybersecurity similarly use their sandbox environments. However, it’s far more critical to ensure that malware has no access to network resources in this scenario. The sandbox environment has its network and is often disconnected from production resources physically. 

The sandbox’s objective is to run malicious programs and analyze them. This code could occasionally be a zero-day exploit, meaning the malware’s effect and payload are unknown. As a result, the sandbox should be denied access to vital infrastructure.

Researchers and analysts in cybersecurity can use it to understand better how the malware operates and what can be done to stop it. It’s the initial step in creating antivirus software that prevents malware from spreading to other computers and removes it from those already infected.

Sandbox environments are widely available for complicated attacks to swiftly evaluate malware and stop it before it becomes a global problem. Ransomware, for example, has the potential to spread worldwide and bring down essential government services. This necessitates the availability of sandboxes for researchers to use in order to assist stop it.


API developers and testers will benefit from an API sandbox. It imitates the characteristics of the production environment to provide simulated API answers that mimic real-world behaviour.

Sandbox Benefits

Although the sandbox is frequently used to test unsafe code, it is also well suited for development testing since it provides the following benefits:

  • Before deploying an application to production or providing it access to production resources, a sandbox can be used to execute it on a safe resource.
  • It allows businesses to execute programs that may cause problems, such as malware or unforeseen software vulnerabilities, without slowing down or destroying business-critical resources.
  • A sandbox is commonly used to quarantine unknown messages and attachments. Although email filters will detect potentially harmful email messages and attachments, an administrator will need a secure location to view them to prevent false positives.
  • Malicious documents may contain macros that exploit weaknesses in popular productivity tools like Microsoft Office.
  • Any employee can use a sandbox to isolate suspicious programs in firms that do not have professional cybersecurity employees. Workers can run unfamiliar code in a sandbox without exposing their systems to new dangers.


The following are some concrete examples of how a sandbox might be used to isolate code execution:

  • Web Browsers

A sandbox can be used to operate a trusted web browser. The damage is then limited to the sandbox and mitigated if a website exploits a vulnerability in that web browser.

  • Software Protection

Some solutions allow users to run software they don’t trust in sandboxes, preventing the software from accessing personal information or harming their devices. Because a sandbox seems to the software to be a complete system, it usually isn’t aware that it is operating in a virtual environment. 

  • Security Research

Sandboxes are used by information security specialists for testing and detecting harmful code. A security tool may, for example, browse websites to see what files are eventually altered, or it could install and run the software. Users can utilise Windows Defender in a sandbox to run antivirus software.

  • Virtualization

A virtual machine is essentially a sandbox. To contain and investigate suspicious programs, this method employs a VM-based sandbox.

Types of Sandbox

Though we described it as a typical testing environment, it also is categorised into different types where each type has another purpose. The kinds of the sandbox are as follows:

Developer Sandbox

A developer sandbox is used to build and test software in a controlled environment. The setup of your production org is duplicated in a Developer Sandbox (metadata).

Developer Pro Sandbox

Developer Pro sandboxes are used for more development and quality assurance duties, as well as integration testing and user training.

Developer Pro sandboxes are designed for development and testing in a secure environment, and they may hold more data than a Developer sandbox. The configuration of your production org is copied into a Developer Pro sandbox (metadata). To handle more development and quality assurance jobs, as well as integration testing and user training, employ a Developer Pro sandbox.

Partial Copy Sandbox

A Partial Copy sandbox is to be utilised as a testing environment. For quality assurance tasks like user acceptability testing, integration testing, and training, employ a Partial Copy sandbox.

Full Sandbox

The objective of a full sandbox is to be utilized as a testing environment. Performance testing, load testing, and staging are only supported in full sandboxes. 

Full sandboxes are exact replicas of your production org, complete with all data and information, such as object records and attachments. Full sandboxes are challenging to use for development because of the long refresh interval.


Sandboxes are an isolated testing environment that allows you to test virus-infected or harmful code without affecting other program portions. Because cyberattacks are becoming more common by the day, businesses must also use a sandbox as a testing environment.

Learn to code for free!

Before you get to working with sandboxes, it might be worthwhile to learn how to code. Here’s something for free to start you off. Our 5 Day Coding Challenge, where you can learn the basics of HTML, CSS and JavaScript. Register now through the form below. 

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