Dangerous Things On Web

There are list of topics that will download viruses without our knowledge.There are list of threats or dangerous places by going where you may download unwanted infections.

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Identifying Virus, Worm and Trojan -Symptoms

A Computer Virus can attack a PC in many number of ways; email attachments, clicking on links, pen drives, from network computers. Symptoms or identifying a virus infection will be based on many things and the main identifiers are listed below:

• The computer crashes, and then it restarts every few minutes in the middle of something.
• The computer restarts on its own.
• Applications on the computer do not work correctly.
• Disks or disk drives are inaccessible.
• You cannot print items correctly.
• You see distorted menus and dialog boxes.
• There is a double extension on an attachment that you recently opened, such as a .jpg, .vbs, .gif, or .exe. extension.
• An antivirus program is disabled for no reason and cannot be restarted.
• An antivirus program cannot be installed on the computer, or the antivirus program will not run.
• New icons appear on the desktop that you did not put there, or the icons are not associated with any recently installed programs.
• A program disappears from the computer even though you did not intentionally remove the program.

Symptoms of worms and trojan horse viruses in e-mail messages:

When a computer virus infects e-mail messages or infects other files on a computer, you may notice the following symptoms:

• The infected file may make copies of itself. This behavior may use up all the free space on the hard disk.
• A copy of the infected file may be sent to all the addresses in an e-mail address list.
• The computer virus may reformat the hard disk which will delete all files and programs.
• The computer virus may install hidden programs, such as pirated software that will deactivate the original version and sells the same pirated version.
• The computer virus may reduce security. This could enable intruders to remotely access the computer or the network.
• You receive an e-mail message that has a strange attachment. When you open the attachment, dialog boxes appear, or a sudden degradation in system performance occurs.
• Someone tells you that they have recently received e-mail messages from you that contained attached files that you did not send. The files that are attached to the e-mail messages have extensions such as .exe, .bat, .scr, and .vbs extensions.

 

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Virus and Its Properties

A computer virus is a small software program that spreads from one computer to another computer and that interferes with computer operation.Viruses can spread from one system to another system on a network. Computer viruses are most easily spread by attachments in e-mail messages or by instant messaging messages. Therefore, you must never open an e-mail attachment unless you know who sent the message or unless you are expecting the e-mail attachment. Computer viruses also spread by using downloads on the Internet. Computer viruses can be hidden in pirated software or in other files or programs that you may download. A true virus can spread from one computer to another, when its host is taken to the target computer. They are platform independent which means it can affect any operating system depending on its programming function. They can even disable or destroy hardware.

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WORM_DOWNAD.KK

This is the latest variant of Worm_Downad.It exploits software vulnerabilities to propagate to other computers across a network. This Worm may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

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WORM_DOWNAD.A

This is the primary variant of the family Conflicker/Downad. This .DLL worm may be downloaded from remote sites by other malware. It may be dropped by other malware. It may also arrive bundled with free software packages as a malware component.

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