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W32/HLLP.Hantaner.wor​m

This page shows details and results of our analysis on the malware W32/HLLP.Hantaner.worm

Threat Detail

Malware Type: Virus

Malware Sub-type: File Infector

Discovery Date: 2002-12-05

Next Steps:

Overview

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.


Minimum DAT

4237 (2002-12-11)

Updated DAT

4306 (2003-11-26)

 Minimum Engine

5.1.00

File Length

24064 bytes

Description Added

2002-12-12

Description Modified

2003-06-10

Malware Proliferation

Characteristics

This file-infecting virus specifically targets files that are downloaded from the web.

When an infected file is run, it will infect only files with the suffix EXE that are in the download folders for either Internet Explorer or KaZaa. It will prepend the files it infects, regardless of whether they are truly executables, or just named as such.

The specific location for the download directories will differ from one system to the next. For example, for KaZaa, this is generally \Program Files\KaZaA\My Shared Folder. The download folder information is gleaned by the virus from the registry and if there are no download directories specified, the virus will not run.

Files may be corrupted during infection such that they will no longer run, or they may run but will not function correctly.

Symptoms

Change in file-size or date stamps on files in the KaZaa or Internet Explorer download directories.

Method of Infection

This virus does not go memory resident and does not make any references to itself in startup locations. To infect other files on a system, an infected file must be run. These infected files would most likely be spread by downloading shared files over the KaZaa network from an infected user's system.

Removal

All Users:
Use current engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

But in some particular cases, the following steps need to be taken.

Please go to the Microsoft Recovery Console and restore a clean MBR.

On Windows XP:

  • Insert the Windows XP CD into the CD-ROM drive and restart the computer.
  • When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
  • Select the Windows installation that is compromised and provide the administrator password.
  • Issue 'fixmbr' command to restore the Master Boot Record
  • Follow onscreen instructions.
  • Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

  • Insert the Windows CD into the CD-ROM drive and restart the computer.
  • Click on "Repair Your Computer".
  • When the System Recovery Options dialog comes up, choose the Command Prompt.
  • Issue 'bootrec /fixmbr' command to restore the Master Boot Record.
  • Follow onscreen instructions.
  • Reset and remove the CD from CD-ROM drive.

Variants

United States - English