Sophos

Troj/Penta-A

Aliases
  • Trojan-Downloader.Win32.Small.bdc
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Included in our products from September 2005 (3.97)
Protection available since 13 July 2005 13:12:17 (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\

and remove any reference to any file you deleted.

Close the registry editor.

More Information

Troj/Penta-A is a downloader Trojan for the Windows platform.

Troj/Penta-A downloads files from a remote server to the folder that it is run from.

Troj/Penta-A runs these files, and creates the following registry entries to automatically start the two files when

Windows starts up:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
GAELICUM.EXE
<Path to Trojan>\GAELICUM.EXE

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
CBACK.EXE
<Path to Trojan>\CBACK.EXE

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