[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Some ASSHOLE sent me a virus.



Sorry for the non-roc. Here is info on the virus.
 
C-man
 
 
Profile

Name
W32/Pretty.Worm

Aliases
I-Worm.PrettyPark, Pretty Worm, PrettyPark

Variants
None

Related Downloads
Zipped "undo.reg" to undo registry changes by this Internet worm on NT/95/98, download here

Date Added
6/8/99

Information

  Discovery Date: 5/26/99
  Origin: France
  Length: 37,376
  Type: Trojan
  SubType: worm
  Risk Assessment: Medium
  Minimum DAT: 4029
  Minimum Engine: 4.0.25

Characteristics
This is a worm that infects Windows 9x/NT files. It arrives via email from infected users. It appears as an icon of a character "Kyle" from the animated comedy series "Southpark".

This worm will try to email itself automatically every 30 minutes to all email addresses listed in the Windows address book which is associated with Outlook Express.

A second function of this worm is that it will also try to connect to an IRC server and join a specific IRC channel. While connected, this worm tries to stay connected by sending information to the IRC server, and will also retrieve any commands from the IRC channel. While on the determined IRC server, the author of this worm could use the connection as a remote access trojan in order to get information such as the computer name, registered owner, registered organization, system root path, and Dial Up Networking username and passwords.

Symptoms
Emails containing this Internet worm have this format:

-------------
Subject: C:\CoolProgs\Pretty Park.exe

Test: Pretty Park.exe :)


-------------

This program, when run will copy itself to FILES32.VXD in WINDOWS\SYSTEM folder. It then modifies the registry key value "command" located in the location:

HKEY_LOCAL_MACHINE\Software\CLASSES\exefile\shell\open

from "%1" %* to FILES32.VXD "%1" %*. This in essence will cause the FILES32.VXD to run during the execution of any exe file.

See this related description of W32/Pretty.worm.unp.

Method Of Infection
Direct execution of the file "Pretty Park.exe" will install to the local system as mentioned above.

Removal Instructions
The order to remove this trojan is complicated by the depth to which the trojan hooks the operating system. The following procedure should remove the Trojan. With Windows 95/98, the registry can be loaded and edited using the program named REGEDIT while in Windows NT, you use REGEDT32

1) Identify and note the files associated with this trojan as detected by the scanner - do not remove the trojan at this time. If you have already removed the trojan, you will not be able to run REGEDIT steps below on the affected system. Proceed instead to step 11 listed below.

2) Open an MS-DOS prompt via the menu or click on START|RUN and type COMMAND and then

3) At the prompt, type START COMMAND and press and then start Regedit in Windows 95/98 by typing REGEDIT or in Windows NT type REGEDT32 and press

4) Remove references to the trojan from these keys of the registry

HKEY_CLASSES_ROOT\exefile\shell\open\command\
HKEY_LOCAL_MACHINE\exefile\CLASSES\exefile\shell\open\command\

(If this exists)
HKEY_LOCAL_MACHINE\Software\CLASSES\exefile\shell\open\command

They should contain only the value not including brackets ["%1" %*].

5) If applicable, remove any keys that run the main trojan under

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices\

And

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\

6) If applicable, delete the registry key if it exists

HKEY_CLASSES_ROOT\.dl

and exit Regedit

7) If applicable, edit WIN.INI and remove the reference to the trojan from the run= line in the [windows] section.

8) If applicable, edit SYSTEM.INI and remove the reference to the trojan from the shell= line in the [boot] section. It should just contain the file EXPLORER.EXE.

9) Restart the system.

10) Delete the trojan program(s). If all is well the files should be deleted OK. If you get an error message saying that windows is unable to delete the file because it is in use, then you have made an error in the above procedure. Repeat steps 1 to 9 and try again.

11) In the event that the trojan was deleted before making the registry changes, it is still possible to repair the registry. You will need access to another computer, or at a minimum, access to MS-DOS on the affected system. Using MS-DOS edit, create a file called UNDO.REG with the following content (you can cut and paste):

REGEDIT4

[HKEY_CLASSES_ROOT\exefile\shell\open\command]
@="\"%1\" %*"

[HKEY_LOCAL_MACHINE\exefile\CLASSES\exefile\shell\open\command]
@="\"%1\" %*"


12) Save this file to the Windows folder of the affected system as the file "UNDO.REG".

13) Click on START|RUN and type in UNDO.REG and press ENTER. The contents of UNDO.REG should be now imported to the registry.

  ****************************************************************************************************************** 
EmailExpress: 38958961@pager.icq.com <mailto:38958961@pager.icq.com
Homepage: <http://geocities.com/MotorCity/Garage/9001
ICQ Communication Center Address: http://wwp.icq.com/38958961 

GIF image