Sophos

Troj/Zlob-OY

Aliases
  • Trojan-Downloader.Win32.Zlob.up
  • Puper.gen
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from February 2007 (4.14)
Protection available since 22 June 2006 12:28:23 (GMT)
Last updated 15 December 2006 06:26:33 (GMT)
Detected by All Sophos products

Action

More Information

Troj/Zlob-OY is a Trojan for the Windows platform.

When Troj/Zlob-OY is installed the following files are created:

<System>\simpole.tlb
<System>\stdole3.tlb

The file hp100.tmp is registered as a COM object and Browser Helper Object (BHO) for Microsoft Internet Explorer, creating registry entries under:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\(686a161d-5bd1-4999-8832-6393f41e564c)
HKCR\CLSID\(686a161d-5bd1-4999-8832-6393f41e564c)

Troj/Zlob-OY changes Start Page and search settings for Microsoft Internet Explorer by modifying values under:

HKCU\Software\Microsoft\Internet Explorer\Search\
HKCU\Software\Microsoft\Internet Explorer\Main\Start Page

Registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objecta\(686a161d-5bd1-4999-8832-6393f41e564c)\

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objecta\(686a161d-5bd1-4999-8832-6393f41e564c)\(default)

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\explorer\run
dcomcfg.exe
dcomcfg.exe

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