Sophos

Troj/Haxdoor-AE

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 17 March 2005 20:37:53 (GMT)
Last updated 18 March 2005 15:22:34 (GMT)
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Action

More Information

Troj/Haxdoor-AE is a backdoor Trojan for the Windows platform that provides unauthorised remote access to the infected computer.

The main executable component of Troj/Haxdoor-AE may be located with the filename vtd_16.exe in the Windows system folder or upd1.exe in the TEMP folder.

Once executed the main component of the Troj/Haxdoor-AE drops the following files to the Windows system folder:

cm.dll
draw32.dll
hm.sys
memlow.sys
p2.ini
vdnt32.sys
wd.sys
i.a3d
klogini.dll

where p2.ini, i.a3d and klogini.dll are log data files, hm.sys and vdnt32.sys are components of the Trojan, and cm.dll, draw32.dll, memlow.sys and wd.sys are detected by the Troj/Haxdoor-Fam.

In order to be able to run on restart Troj/Haxdoor-AE installs service process and driver with the following characteristics:

servicename = memlow
displayname = "LMMngr"
imagepath = \\%Windows%\%system%\memlow.sys

and

drivername = vdnt32
displayname = "MemDRV"
imagepath = \\%Windows%\%system%\vdnt32.sys

Also Troj/Haxdoor-AE adds the next values to Winlogon Notify registry entries on the Winodws NT :

name = draw32
path = draw32.dll
notifyfunction = "MedManager"

An entry may be added to the following registry entry with a path to the file vtd_16.exe:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run

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