Remote desktop software

Short description: Desktop run remotely from local device

"Remote desktop" redirects here. For other uses, see Remote desktop (disambiguation).

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Remote desktop software is software for remote administration of computers, allowing a desktop environment to be displayed on a computer, known as the client, other than the one on which it is running − the server. While commonly found in the context of personal computers, the concept also applies to other forms of computers, such as smartphones and dedicated servers.

Remote desktop applications have varying features. Some allow attaching to an existing user's session and "remote controlling", either displaying the remote control session or blanking the screen.

## Contents

* 1 Overview
* 2 Uses
* 3 Protocols
* 4 Malicious variants
* 4.1 Notable examples
* 5 See also
* 6 References
* 7 External links

## Overview

Remote access can also be explained as the remote control of a computer by using another device connected via the internet or another network. This is widely used by many computer manufacturers and large businesses' help desks for technical troubleshooting of their customers' problems.

Remote desktop software captures the mouse and keyboard inputs from the local computer (client) and sends them to the remote computer (server).[1] The remote computer in turn sends the display commands to the local computer. When applications with many graphics including video or 3D models need to be controlled remotely, a remote workstation software that sends the pixels rather than the display commands must be used to provide a smooth, like-local experience.

Remote desktop sharing is accomplished through a common client/server model. The client, or VNC viewer, is installed on a local computer and then connects via a network to a server component, which is installed on the remote computer. In a typical VNC session, all keystrokes and mouse clicks are registered as if the client were actually performing tasks on the end-user machine.[2]

Remote desktops also have a major advantage for security development, companies are able to permit software engineers who may be dispersed geographically to operate and develop from a computer which can be held within the companies office or cloud environment.

The target computer in a remote desktop scenario is still able to access all of its core functions. Many of these core functions, including the main clipboard, can be shared between the target computer and remote desktop client.

Following the onset of COVID-19, the shift to remote-work environments has led many to work from home with devices without enterprise IT support. As a result, these workers were reliant on remote desktop software to collaborate and keep their systems available and secure.[3]

## Uses

A main use of remote desktop software is remote administration and remote implementation. This need arises when software buyers are far away from their software vendor. Most remote access software can be used for "headless computers": instead of each computer having its own monitor, keyboard, and mouse, or using a KVM switch, one computer can have a monitor, keyboard, mouse, and remote control software, and control many headless computers. The duplicate desktop mode is useful for user support and education. Remote control software combined with telephone communication can be nearly as helpful for novice computer-users as if the support staff were actually there.

Remote desktop software can be used to access a remote computer: a physical personal computer to which a user does not have physical access, but that can be accessed or interacted with.[4] Unlike servers, remote computers are mainly used for peer to peer connections, where one device is unattended. A remote computer connection is generally only possible if both devices have a network connection.

Since the advent of cloud computing remote desktop software can be housed on USB hardware devices, allowing users to connect the device to any PC connected to their network or the Internet and recreate their desktop via a connection to the cloud. This model avoids one problem with remote desktop software, which requires the local computer to be switched on at the time when the user wishes to access it remotely. (It is possible with a router with C2S VPN support, and wake on LAN equipment, to establish a virtual private network (VPN) connection with the router over the Internet if not connected to the LAN, switch on a computer connected to the router, then connect to it.)

Remote desktop products are available in three models: hosted service, software, and appliance.

Tech support scammers use remote desktop software to connect to their victim's computer and will often lock out the computer if the victim does not cooperate.

## Protocols

Remote desktop protocols include the following:

* Apple Remote Desktop Protocol (ARD) - Original protocol for Apple Remote Desktop on macOS machines.
* Appliance Link Protocol (ALP) - a Sun Microsystems-specific protocol featuring audio (play and record), remote printing, remote USB, accelerated video
* HP Remote Graphics Software (RGS) - a proprietary protocol designed by Hewlett-Packard specifically for high end workstation remoting and collaboration.
* Independent Computing Architecture (ICA) - a proprietary protocol designed by Citrix Systems
* NX technology (NX) a proprietary protocol designed by NoMachine with open-source derivatives available from other forked projects.
* PC-over-IP (PCoIP) - a proprietary protocol used by VMware (licensed from Teradici)[5]
* Remote Desktop Protocol (RDP) - a Windows-specific protocol featuring audio and remote printing
* Remote Frame Buffer Protocol (RFB) - A framebuffer level cross-platform protocol that VNC is based on.
* SPICE (Simple Protocol for Independent Computing Environments) – remote-display system built for virtual environments by Qumranet, now Red Hat
* Xpra - a protocol originally developed for forwarding X11 application seamlessly with audio, video, remote printing, etc. – extended to support Windows and macOS servers
* X Window System (X11) - a well-established cross-platform protocol mainly used for displaying local applications; X11 is network-transparent
* Wake-on-LAN - a standard protocol for remotely waking up computers that are in low-power mode (turned off, but still have access to a power source).

## Malicious variants

A remote access trojan (RAT, sometimes called creepware)[6] is a type of malware that controls a system through a remote network connection. While desktop sharing and remote administration have many legal uses, "RAT" connotes criminal or malicious activity. A RAT is typically installed without the victim's knowledge, often as payload of a Trojan horse, and will try to hide its operation from the victim and from computer security software and other anti-virus software.[7][8][9][10][11][12]

### Notable examples

* Back Orifice
* Back Orifice 2000
* Beast Trojan
* Bifrost[13]
* Blackshades[14][15]
* DarkComet[16][17]
* Havex
* Imminent Monitor[18][19][20][21]
* NjRAT
* PoisonIvy
* Sub Seven

## See also

* Chrome Remote Desktop
* Comparison of remote desktop software
* Comparison of screencasting software
* Desktop virtualization
* Extranet
* FreeRDP
* Virtual Desktop Extender
* Virtual Desktop Infrastructure (VDI)
* Virtual machine
* Software as a service (SaaS)

## References

1. ↑ "Remote Desktop Software". https://remoteaccess.itarian.com/free-instant-remote-access.php.
2. ↑ Virtual Network Computing (VNC): Making Remote Desktop Sharing Possible. Businessnewsdaily.com (2013-11-07). Retrieved on 2014-02-27.
3. ↑ Manson, Jonathan (2022-04-03). "Remote Desktop Software as a forensic resource" (in en). Journal of Cyber Security Technology 6 (1–2): 1–26. doi:10.1080/23742917.2022.2049560. ISSN 2374-2917.
4. ↑ "What is Remote Computer? – Definition from Techopedia" (in en). https://www.techopedia.com/definition/23696/remote-computer.
5. ↑ "VMware Announces Strategic Licensing and Co-development Agreement with Teradici for True Remote PC User Experience Further Bolstering its vClient Initiative". VMware News Releases. VMware. http://www.vmware.com/company/news/releases/teradici_vmworld08.html.
6. ↑ "Creepware — Who's Watching You?". Symantec Security Response. 10 December 2013. https://community.broadcom.com/symantecenterprise/communities/community-home/librarydocuments/viewdocument?DocumentKey=308d3be2-cb5d-4629-afe8-7711f4ef2dc8&CommunityKey=1ecf5f55-9545-44d6-b0f4-4e4a7f5f5e68&tab=librarydocuments.
7. ↑ "Remote Server Administration Tools for Windows 7". Microsoft. 4 June 2009. https://technet.microsoft.com/en-us/library/ee449475(WS.10).aspx. ,
8. ↑ "Danger: Remote Access Trojans". September 2002. https://technet.microsoft.com/en-us/library/dd632947.aspx.
9. ↑ "Understanding the Windows NT Remote Access Service". Microsoft. https://technet.microsoft.com/en-us/library/cc751300.aspx.
10. ↑ "Netsh commands for remote access (ras)". Microsoft. January 21, 2005. https://technet.microsoft.com/en-us/library/cc757467(WS.10).aspx.
11. ↑ "RAS Registry Modification Allowed Without Administrative Rights". Microsoft. http://support.microsoft.com/kb/267861.
12. ↑ "Computer RATS – Protecting Your Self". July 2013. http://howtheyhack.com/computer-rats-protecting-your-self/.
13. ↑ "Code Access Security and bifrost". 20 March 2007. http://www.codinghorror.com/blog/2007/03/code-access-security-and-bitfrost.html.
14. ↑ "BlackShades: Arrests in computer malware probe". 19 May 2014. https://www.bbc.com/news/uk-27471218.
15. ↑ "Remarks Prepared for Delivery by Special Agent in Charge Leo Taddeo at Blackshades Press Conference". Federal Bureau of Investigation. https://www.fbi.gov/newyork/press-releases/2014/remarks-prepared-for-delivery-by-special-agent-in-charge-leo-taddeo-at-blackshades-press-conference.
16. ↑ Denbow, Shawn. "pest control: taming the rats". http://www.matasano.com/research/PEST-CONTROL.pdf.
17. ↑ Aylward, Laura. "Malware analysis – Dark Comet RAT". http://contextis.com/research/blog/malware-analysis-dark-comet-rat/.
18. ↑ "Brisbane teenager built spyware used by domestic violence perpetrators across world, police allege" (in en). the Guardian. 30 July 2022. https://www.theguardian.com/australia-news/2022/jul/30/brisbane-teenager-built-spyware-used-by-domestic-violence-perpetrators-across-world-police-allege.
19. ↑ "Advice for potential victims of IM-RAT malware" (in en). 29 November 2019. https://www.afp.gov.au/rats.
20. ↑ "International crackdown on RAT spyware, which takes total control of victims' PCs" (in en). https://www.europol.europa.eu/media-press/newsroom/news/international-crackdown-rat-spyware-which-takes-total-control-of-victims’-pcs.
21. ↑ "Cybercrime Network focuses on support to victims of malware" (in en). https://www.eurojust.europa.eu/news/cybercrime-network-focuses-support-victims-malware.

## External links

* v
* t
* e

Remote administration software

General|

* Remote desktop software
* Comparison of remote desktop software

Implementations|

* Absolute Manage
* AetherPal
* AnyDesk
* Apple Remote Desktop
* Chrome Remote Desktop
* Citrix XenApp
* Crossloop
* IBM BigFix
* LogMeIn
* Netop Remote Control
* NetSupport Manager
* pcAnywhere
* RealVNC
* Remote Desktop Services
* Remote Utilities
* RescueAssist
* scrcpy
* ScreenConnect
* Secure Shell
* Splashtop
* System Center Configuration Manager
* TeamViewer
* ThinLinc
* TightVNC
* Timbuktu
* UltraVNC
* Virtual Network Computing
* NX technology

Controversial Implementations|

* Back Orifice
* Back Orifice 2000
* NetBus
* Sub7

This article is part of a series on

Information security
Related security categories

* Internet security
* Automotive security
* Cyberwarfare
* Computer security
* Mobile security
* Network security

Threats

* Advanced persistent threat
* Computer crime
* Vulnerabilities
* Eavesdropping
* Malware
* Spyware
* Ransomware
* Trojans
* Viruses
* Worms
* Rootkits
* Bootkits
* Keyloggers
* Screen scrapers
* Exploits
* Backdoors
* Logic bombs
* Payloads
* Denial of service
* Web shells
* Web application security
* Phishing

Defenses

* Computer access control
* Application security
* Antivirus software
* Secure coding
* Secure by default
* Secure by design
* Secure operating systems
* Authentication
* Multi-factor authentication
* Authorization
* Data-centric security
* Encryption
* Firewall
* Intrusion detection system
* Mobile secure gateway
* Runtime application self-protection (RASP)

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