Summary

Summary
Action
More Information
| 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

Summary
Action
More Information
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
