Summary

Summary
Action
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| Affected operating systems | Windows |
|---|---|
| Characteristics |
|
| Protection available since | 28 October 2005 10:01:27 (GMT) |
| Detected by | All Sophos products |
- Free virus, spyware, and adware scan
- Test your existing anti-virus protection
- Find threats your anti-virus missed
Action

Summary
Action
More Information
Please follow the instructions for removing Trojans.
More Information
Troj/PcClient-N is a backdoor Trojan.
When Troj/PcClient-N is installed the following files are created:
<System>\Zrfkupza.d1l
<System>\drivers\Zrfkupza.sys
The file Zrfkupza.sys is detected as Troj/RKPort-Fam.
Troj/PcClient-N includes functionality to inject its code into SVCHOSTS.EXE.
In order to run automatically each time a user logs on, Troj/PcClient-N installs itself as a service named "Zrfkupza" and creates registry entries under the following branch:
HKLM\SYSTEM\CurrentControlSet\Services\Zrfkupza
Under Windows 9x systems, Troj/PcClient-N will set the following registry entry:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
<Trojan base filename>
<System>\<Trojan filename>
Troj/PcClient-N may attempt to download and execute additional files.
