TrojanDownloader:Win32/Drstwex.A is a malware that connects to a remote server to download and execute arbitrary files.

Exploit:JS/Blacole.A is the detection for malicious Javascript that loads a series of other exploits. If the computer runs a vulnerable version of certain software and exploitation is successful, various malware may be downloaded.

Windows Defender detects and removes this family of threats.

You should also update your software to be fully protected.

The Blacole exploit pack tries to infect your PC with other malware, such as trojans and viruses. It also known as "Blackhole".

See our page about exploits and learn how to update common software.

When you visit a malicious or compromised website, Blacole scans your PC for vulnerabilities or weaknesses in your software.

You might visit the website from a link or attachment in an email, or from a previously safe website that has been hacked.

The threat uses those vulnerabilities it has found on your PC to download malware onto your PC:

Typically, the Blacole exploit kit attempts to exploit vulnerabilities in applications such as Oracle Java, Sun Java, Adobe Acrobat and Adobe Reader.