To the casual observer, there are no external signs of a burglary.
In fact, there's no reason you couldn't rob this house through the same backdoor again, assuming you don't ransack the place. In the world of cybersecurity, a backdoor refers to any method by which authorized and unauthorized users are able to get around normal security measures and gain high level user access (aka root access) on a computer system, network, or software application.
mistakes) without having to create a "real" account.
These backdoors aren't supposed to ship with the final software released to the public, but sometimes they do.
To compound the problem, Trojans sometimes exhibit a worm-like ability to replicate themselves and spread to other systems without any additional commands from the cybercriminals that created them. Emotet got its start in 2014 as an information stealer, spreading across devices and stealing sensitive financial data.
Since then Emotet has evolved into a delivery vehicle for other forms of malware.
Trojans are an incredibly versatile instrument within the cybercriminal toolkit.
Much like the Trojan horse of ancient Greek literature, computer Trojans always contain a nasty surprise.
Once cybercriminals have their foot in the door, they might employ what's known as a rootkit.