TrojanDownloader:Win32/Sinis.C is a trojan that downloads a specific potentially malicious file. It may arrive in the computer disguised as a software update for various applications.

Trojan:Win32/Sinis.C is a malicious program that is unable to spread of its own accord. It may perform a number of actions of an attacker's choice on an affected computer.

Windows Defender detects and removes this threat.

This family of hacktools are used to patch or "crack" some software so it will run without a valid license or genuine product key.

Don't run this hacktool as it can be associated with malware or unwanted software.

In the past, we have seen malware on many PCs where hacktools are detected. You can read more in Volume 13 of the Security Intelligence Report.