Troj/Bckdr-PNO

Aliases	IM-Worm.Win32.Sohanad.o
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
Included in our products from	December 2006 (4.12)
Protection available since	6 November 2006 05:23:59 (GMT)
Detected by	All Sophos products

Troj/Bckdr-PNO is an Instant Messaging Trojan for the Windows platform.

When first run Troj/Bckdr-PNO copies itself to:

<User>\Application Data\App\<random filename1>.exe
<System>\<random filename2>.exe
<System>\<random filename3>.exe
<Windows>\regedit.exe

The following registry entry is created to run Troj/Bckdr-PNO on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
winValidate
<System>\<random filename2>.exe delnext <System>\<random filename3>.exe

The following registry entry is set, disabling the registry editor (regedit):

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1

Registry entries are created under:

HKLM\SOFTWARE\Microsoft\Conf\

Troj/Bckdr-PNO may periodically send the following IM messages with links to non-malicious websites:

'<url>
So funny =)) '

'<url>
Hav never seen such funny pics =)) '

'<url>
write back to me if you feel the same'

'Wow =))
<url>'

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