Sophos

Troj/Ranck-BS

Aliases
  • TrojanProxy.Win32.Ranky.av
  • Proxy-FBSR
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Included in our products from February 2005 (3.90)
Protection available since 29 December 2004 11:20:51 (GMT)
Detected by All Sophos products

Action

Please follow the instructions for removing Trojans.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
fqxsbk
<path to EXE>

and delete it if it exists.

Close the registry editor.

More Information

Troj/Ranck-BS is a proxy Trojan for the Windows platform.

Troj/Ranck-BS chooses a random port in the range 10000 to 39999 to listen for incoming http requests. The Trojan then attempts to contact several remote sites to register itself with a remote user.

In order to run on system start, the Trojan creates the following registry entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
fqxsbk
<path to EXE>

Sophos's anti-virus products include proactive protection technology, which can defend against new threats without requiring an update. Sophos customers have been protected against Troj/Ranck-BS (detected as Troj/Ranck-Fam) since version 3.88.

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