Troj/Small-BNO

Category	Viruses and Spyware
Type	Trojan
What to do	If you've received an alert for a virus or spyware, then follow the instructions for removing the threat.
Prevalence	low high

Summary


Affected operating systems	Windows
Characteristics	Installs itself in the registry
Protection available since	26 April 2006 20:13:36 (GMT)
Detected by	All Sophos products

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Troj/Small-BNO is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.

Troj/Small-BNO includes functionality to access the internet and communicate with a remote server via HTTP.

When Troj/Small-BNO is installed it creates the file <User>\Documents\Settings\polymorph.dll.

The following registry entries are created to run code exported by polymorph.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\polymorphreg
DllName
<User>\Documents\Settings\polymorph.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\polymorphreg
Startup
polymorphreg

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\polymorphreg
Impersonate
1

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