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Typical Symptoms  Refers to analyzed data
Discovered  [korea] 2009-04-06
 [Foreign] 0000-00-00
Type  Virus ActiveField  VBS
Origin  others Encryption  NO
Location  File Memory residence  NO
Scan engine needed
2009-04-06 [Able to detect & repair]
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[Symptom of Infection]

1. This malicious code is a script file that is written by script language, and user can check its whole action procedures by text editor.

2. It exchanges files type from 2Byte(=BM) to MZ for executing c_70002.nls file, and then creates HncUpdate.exe(Trojan.Win32.Agent.138240.N) file.

3. In other words, c_70002.nls and HncUpdate.exe are technically same files except Signature of IMAGE DOS HEADER.
Removal Instructions
[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 (

b. Non-ViRobot products users
     - Use the LiveCall (Free Scan) via the website (

     - 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 Expert 4.0 : [Edit] -> [Configuration] -> [Scan] : Check all files
- 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.
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