Droppers are specially crafted PHP scripts which payload is to download (drop) a second malicious file and execute it. The dropped file can be a backdoor, hacktool, defacement or spam-seo related malware.
Affecting
Any vulnerable website. Outdated software or compromised passwords can act as an infection vector.
Cleanup
Inspect your site's files looking for suspicious eval() entries or calls to third-party websites.. Also you can sign up with us and let our team help you restoring your sitea and removing any remaining malware for you.