Sophos

Troj/Haxdoor-AQ

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Protection available since 21 January 2006 16:36:59 (GMT)
Detected by All Sophos products
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Action

More Information

Troj/Haxdoor-AQ is a backdoor Trojan for the Windows platform.

Troj/Haxdoor-AQ drops the following files:

<System>\iesdl4l.dll
<System>\iesservice4.sys

The file iesservice4.sys is detected as Troj/Haxdor-Fam. The file iesdl4l.dll is detected as Troj/Haxdoor-AQ.

The following registry entries are created to run code exported by iesdl4l.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\iesdl4l
DllName
iesdl4l.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\iesdl4l
Startup
iesdl4l

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\iesdl4l
Impersonate
1

The file iesservice4.sys is registered as a new system driver service named "iesservice4", with a display name of "LOGON support service". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\iesservice4\

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