WinShell Trojan

WinShell description:
WinShell Category:Trojan,Backdoor,RAT
This category includes a variety of Trojans that damage victim machines or
threaten data integrity, or impair the functioning of the victim machine.
Backdoors combine the functionality of most other types of in one package.
Backdoors have one especially dangerous sub-class: variants that can propagate like worms.

Many trojans and backdoors now have remote administration capabilities
allowing an individual to control the victim's computer.
Many times a file called the server must be opened on the victim's computer before
the trojan can have access to it.

These are generally sent through email, P2P file sharing software,
and in internet downloads. They are usually disguised as a legitimate program or file.
Many server files will display a fake error message when opened, to make it seem like it didn't open.
Some will also kill antivirus and firewall software.

Some RAT trojans are pranks that are most likely being controlled by a friend or enemy on
April Fool's day or a holiday. Prank RATS are generally not harmful, and won't log keystrokes or hack.
They usually do whimsical things like flip the screen upside-down, open the CD-ROM tray,
and swap mouse buttons. However, they can be quite hard to remove.

Removing WinShell:

you can run trial version of ExterminateIt, or remove WinShell manually.

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To completely manually remove WinShell malware from your computer, you need to delete the Windows registry keys and registry values, the files and folders associated with WinShell.

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Also Be Aware of the Following Threats:
Softomate Adware Symptoms
Removing IRC.ColdLife Worm
ATM Trojan Cleaner