Attacks and malware
What is Dropper?
A small piece of malware that carries another malicious program inside it and installs it on the victim's machine.
A dropper is a small program that carries another malicious file inside itself and writes it to disk or into memory on the victim machine. The difference from a loader is that the payload is bundled rather than downloaded, although the terms are often used loosely.
Droppers usually hide the payload with encryption or compression, so the dangerous code is only visible after the dropper runs. Sandboxes and memory analysis help recover it.