Sophos

Troj/Dedler-D

Aliases
  • Worm.Win32.Dedler.r
Category
Type
What to do
Prevalence low high

Summary

 
Included in our products from August 2004 (3.84)
Protection available since 8 July 2004 12:39:00 (GMT)
Last updated 16 August 2004 08:39:53 (GMT)
Detected by All Sophos products

Action

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 entries. The removal of these entries 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 entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
VC5MediaPlayer = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WIN95DEFVIEW = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WindowsInstaller = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
MsgApi = <path_to_self>

and delete them if they exist.

Close the registry editor.

More Information

Troj/Dedler-D is an ICQ Trojan which when run copies itself
to the Windows system folder as csmss.exe and sets one of the
following registry entries in order to auto-start on user logon
or system start:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
VC5MediaPlayer = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WIN95DEFVIEW = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
WindowsInstaller = <path_to_self>

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
MsgApi = <path_to_self>

The Trojan will attempt to connect to icq.login.com and begin
data transfer.

Troj/Dedler-D will also attempt to terminate the following
security related services:

Network Client Monitor
Network Client
kavsvc
SAVScan
Symantec Core LC
navapsvc
wuauserv

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