W32/Sdbot-KR

Please follow the instructions for removing worms.

Change any data that may have become compromised.

Check your administrator passwords and review network security.

You will also need to edit the following registry entries, if they are present. 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

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices

and remove any reference to any file you deleted.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\

and remove any reference to any file you deleted.

Close the registry editor.

W32/Sdbot-KR is an IRC backdoor Trojan and network worm which can run in the background as a service process and allow unauthorised remote access to a remote intruder via the IRC channel.

W32/Sdbot-KR copies itself to the Windows System (or System32 under MS Win NT/2000/XP) folder as LANDISC.EXE and creates the following registry entries so that this worm is run automatically on system restart:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Windows Messenger 4.14 = landisc.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Windows Messenger 4.14 = landisc.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Windows Messenger 4.14 = landisc.exe

W32/Sdbot-KR remains resident listening for commands from the remote intruder.

If the appropriate commands are received the worm will begin scanning the internet for network shares with weak administrator passwords and will attempt to copy itself to these shares.

This worm can also initiate SYNflood attacks, exploit computers infected with W32/MyDoom and attempt to steal CD keys from several computer games.

W32/Sdbot-KR can also delete shared drives and exploit the DCOM vulnerability on unpatched computers.