Updated: December 8, 2006 5:00:51 PM
Also Known As: Adware.SpySheriff [Symantec]
Type: Misleading Application
Name: Brave Sentry
Publisher: SpySheriff; SpyTrooper; PestTrap
Risk Impact: Medium
Systems Affected: Windows 98, Windows 95, Windows XP, Windows Me, Windows NT, Windows 2000
BehaviourSpySheriff is a misleading application that may give exaggerated reports about potential risks on the computer.
It scans parts of the registry and several system locations in order to detect risks.
The risk displays the following message periodically:

The program may falsely report the presence of risks due to the detection techniques used, such as detection based solely on file names.

The application identifies several false risks, including:
- Trojan VX Downloader
- Trojan VX 12
The program then directs the user to the program's Web site to purchase the full version of the product in order to remove any discovered risks.
InstallationWhen SpySheriff executes, it creates the following files:
- %ProgramFiles%\SpySheriff\base.avd
- %ProgramFiles%\SpySheriff\base001.avd
- %ProgramFiles%\SpySheriff\base002.avd
- %ProgramFiles%\SpySheriff\found.wav
- %ProgramFiles%\SpySheriff\heur000.dll
- %ProgramFiles%\SpySheriff\heur001.dll
- %ProgramFiles%\SpySheriff\heur002.dll
- %ProgramFiles%\SpySheriff\heur003.dll
- %ProgramFiles%\SpySheriff\IESecurity.dll
- %ProgramFiles%\SpySheriff\notfound.wav
- %ProgramFiles%\SpySheriff\ProcMon.dll
- %ProgramFiles%\SpySheriff\removed.wav
- %ProgramFiles%\SpySheriff\SpySheriff.dvm
- %ProgramFiles%\SpySheriff\SpySheriff.exe
- %ProgramFiles%\SpySheriff\Uninstall.exe
- %UserProfile%\Desktop\SpySheriff.lnk
- %UserProfile%\Start Menu\Programs\SpySheriff.lnk
Next, the following registry subkeys are created:
HKEY_CURRENT_USER\Software\SpySheriff
HKEY_CURRENT_USER\Software\SNO2
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SpySheriff
It then creates the following registry entry so that it executes whenever Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"SpySheriff" = "%ProgramFiles%\SpySheriff\SpySheriff.exe"