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Apr 18, 2013

Risk Level 1: Very Low

Backdoor.Matsnu.B is a Trojan horse that opens a back door on the compromised computer.

Initial Daily Certified version of virus definitions for Norton security products was released on April 18, 2013 revision 005. It should be noted that users with the older versions of Norton Internet Security are limited to Daily LiveUpdate definitions. For more information, go to the page where the are described virus definitions available for Norton products.

Backdoor.Matsnu.B Threat Assessment
Wild LevelLow
Number of Infections0 - 49
Number of Sites0 - 2
Geographical DistributionLow
Threat ContainmentEasy
Damage LevelHigh
Distribution LevelLow

According to the Symantec Threat Severity Assessment, overall risk of Backdoor.Matsnu.B is now categorized as «Very Low» — poses little threat to users; rarely even makes headlines; no reports in the wild. Read more about Threat Severity Assessment.

More information about Backdoor.Matsnu.B, you can find on the official site of Symantec Corporation, where in addition to useful information you can find technical details and removal instructions:

It is also recommended to read the article Network security threats, where you can find a brief description and explanation of the most dangerous security threats plus a few simple tips on how to protect your personal computer from them.

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