TrojanDownloader:Java/Toniper is a Java trojan that connects to a specified URL to download other malware onto your computer.
What to do now
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:
TrojanDownloader:Java/Toniper is a Java trojan that downloads other malware onto your computer.
TrojanDownloader:Java/Toniper may arrive on your computer when you visit a compromised website that hosts the trojan.
Downloads other malware
In the wild, we have observed TrojanDownloader:Java/Toniper connecting to specified URLs in order to download malware; for example, we have observed it connecting to "dl.dropbox.com" to download the following file: