[Symptom of Infection]

1. It creates below files to system folder and windows folder.

977o.dll.vir - Trojan.Win32.S.Downloader.159744.D
91bd.exe.vir - Trojan.Win32.S.Downloader.159744.D
799d.exe.vir - Adware.Rugo.176128
1b6u.bmp.vir - Adware.Rugo.684032
f91d.flv.vir - Adware.Rugo.176128
9bee.dll.vir - Adware.Rugo.684032
ms.job.vir   - Job.S.Rugo.240

2. It adds values to registry like below.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mdlea]
"Type"=dword:00000010
"Start"=dword:00000002
"ErrorControl"=dword:00000001
"ImagePath"=c:\windows\system32\799d.exe
"DisplayName"="Mdlea"
"ObjectName"="LocalSystem"

3. It creates JOB file to job scheduling folder.

Scheduled job executes Adware.Rugo.684032.

[Notation]
-"(Windows Folder)" could be different by system and generally this is "C:\Windows (Windows 95/98/ME/XP), C:\WinNT (Windows NT/2000)".
- "(System Folder)" could be different by system, and generally this is "C:\Windows\System (Windows95/98/Me), C:\Winnt\System32 (Windows NT/2000), C:\Windows\System32 (Windows XP)".

- "(Job Scheduling Folder)" could be different by system, and generally this is "C:\WINDOWS\Tasks  (Windows95/98/Me), C:\WINDOWS\Tasks (Windows NT/2000), C:\WINDOWS\Tasks (Windows XP)".

[How to repair]

1. If you are WinXP/ME users, please be inactivate System Recovery Function.

The reason why being inactivate of the system recovery is to clean the virus completely.
You can refer to MS technical documents(Q263455) for more details.

2. Update the engine module for the latest one.
To repair this virus, you need to update the engine for the latest one.

a. ViRobot products users
     -Download the latest engine files via our website (www.hauri.net)

b. Non-ViRobot products users
     - Use the LiveCall (Free Scan) via the website (http://www.livecall.co.kr)

     - Use the trial version of ViRobot products (30days only)

3. How to scan the virus.

a. Run your ViRobot, and choose "all files" in scan option.

- ViRobot Desktop 5.0 : [Tools] -> [Configuration] -> [Virus Scan] : Check all files

- ViRobot Desktop 5.5 : [Tools] -> [Configuration] -> [Virus Scan] : Check all files

- LiveCall (Free Scan) : [Advanced Scan] : Check

b. Repair all viruses detected.

c. If [Auto-repair after rebooting] message shows up, please try to re-scan after rebooting the PC.