high
Summary
Summary
Action- More Information
| Affected operating systems | Windows |
|---|---|
| Characteristics |
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| Included in our products from | June 2005 (3.94) |
| Protection available since | 29 March 2005 13:16:33 (GMT) |
| Last updated | 25 April 2005 19:05:22 (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
GNP Generic Host Process
C:\\WINDOWS\\system\\svchost.exe
and delete it if it exists.
Close the registry editor.
More Information
Troj/Zapchas-F is a mIRC-based backdoor Trojan.
The Trojan creates several files in the system\ subfolder of the Windows folder. One of these (svchost.exe) is a renamed copy of the mIRC application, one is a mIRC script file (also detected as Troj/Zapchas-F) and the remainder are configuration settings for the Trojan.
Troj/Zapchas-F creates the following registry entry in order to be automatically run at logon:
HKLM\\Software\Microsoft\Windows\CurrentVersion\Run
GNP Generic Host Process
C:\\WINDOWS\\system\\svchost.exe
Troj/Zapchas-F connects to a preconfigured IRC server and joins a channel in which it can receive further instructions from any of a list of usernames specified in one of the configuration files.
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