You might have heard word website backdoor while watching some movies and Tv Shows. But what actually is Backdoor? You need to get understanding of this malware for good web security and ensuring that your website doesn’t become compromised again and again. Backdoors are types of malware that allow for remote control of a compromised website by bypassing appropriate authentication methods. Simply put, placing a backdoor on your website allows hackers to retain control of the website and reinfect you again and again. Even after you have updated your site, changed passwords, and other posthack cleanups, the backdoor still might not be removed. In fact, this is what make backdoors so dangerous as their whole purpose is to remain hidden.
A typical backdoor consists of 2 components – the client and its server(s).An attacker will use a client application to communicate with the server components, which are installed on the victim’s system. The server components can be delivered to the victim’s system in numerous ways – as part of a worm or trojan payload, as an e-mail attachment, as a tantalizingly-named file on peer-to-peer networks, etc.
Once installed, the server component will open a network port and communicate with the client, to indicate that the computer is infected and vulnerable. An attacker can then use the backdoor’s client to issue commands to the infected system. Depending on how sophisticated a client is, it can easily acccess victims files.
Popular Company as Samsung was also victim of backdoor. In January 2014, a backdoor was discovered in certain Samsung Android products, like the Galaxy devices. The Samsung proprietary Android versions are fitted with a backdoor that provides remote access to the data stored on the device. In particular, the Samsung Android software that is in charge of handling the communications with the modem, using the Samsung IPC protocol, implements a class of requests known as remote file server (RFS) commands, that allows the backdoor operator to perform via modem remote I/O operations on the device hard disk or other storage
Why Are Backdoors So Hard to Find?
Backdoors are usually very hard to find because they don’t have to be linked anywhere in the site.. Most backdoors are designed so that they can be easily confused with non-malicious code. Some of them have passwords, some are heavily encrypted/encoded and they can be located anywhere in a website’s file system or database.
Backdoor also might be attached with Free WordPress or any CMS plugins. So before Using plugins be sure to verify its authenticity. Always change the default password of the website or device after you gain it