Removal technique described at end. Hope this helps.....I am Macintosh based, and run Norton Anti Virus every two days for protection... Daniel Boone Bostdorf The info: THE VIRUS KNOWN AS "SNOW WHITE AND THE SEVEN DWARFS" Real name:W95.Hybris.gen Discovered on: September 25, 2000 W95.Hybris is a worm that spreads by email as an attachment to outgoing email messages. The email message or subject may include, but is not limited to: [email protected] Snow White and the Seven dwarves The attachment may have one of several different names, including, but not limited to: anpo porn(.scr atchim.exe branca de neve.scr dunga.scr dwarf4you.exe enano porno.exe joke.exe midgets.scr sexy virgin.scr Also Known As: W32.Hybris.gen, W32.Hybris.22528.dr, W32/[email protected], I-Worm.Hybris Category: Worm Virus Definitions: September 25, 2000 Threat Assessment: Wild:High Damage:Low Distribution: High Wild: Number of infections: 50 - 999 Number of sites: More than 10 Geographical distribution: Medium Threat containment: Moderate Removal: Moderate Distribution: Name of attachment: Random with EXE or SCR file name extension Technical description: When the worm attachment is executed, the Wsock32.dll file is modified or replaced. Once the worm has infected wsock32.dll, it has the abilty to monitor the Internet connection as well as incoming and outgoing email traffic. The worm then scans for email addresses. When an email address is detected whether on an Internet site or in email being sent or received, the worm waits for a period of time and then sends an infected message to the detected address. The worm attempts to connect to the alt.comp.virus newsgroup. If it connects successfully, then the worm uploads its own plug-ins to this newsgroup in an encrypted form. It goes thru the subject header of the messages, and tries to match a specific format. The subject header will also specify the version number of the attached plug-in if the plug-ins are present. If newer versions of the plug-ins are found, the worm downloads them and updates its behavior. One of the plug-ins for W95.Hybris.gen generates a spiral image. Upon execution, the plug-in initially loads OpenGL libraries which are used to draw a large black and white spiral image. It also registers itself as a service; this prevents it from being displayed in the Close Programs dialog box. For additional information on this, see the document W95.Hybris.Plugin. This worm also has a plug-in that infects executable programs. The DOS EXE infection is fairly simple dropping technique. The virus code is appended to the end of the file with a small 16-bit dropper routine. This routine creates a temporary file with an .exe extension in the TEMP folder and executes it. It then deletes the temporary executable. In this way, Wsock32.dll is infected with the actual worm body. The PE executables have a much more complicated file infection process. PE files become infected only if they have a long enough code section. The virus infection plug-in packs the original code area and overwrites it if it will fit in the same place. This complicated antiheuristic infection technique is difficult but possible to repair. If Wsock32.dll is being used by the system, the worm cannot modify it. In this situation, the worm will add a registry entry to one of the following subkeys: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce It always alternates between these two keys as the worm spreads from one computer to another. The worm hooks onto the following exports of Wsock32.dll: send() recv() connect() Whenever you send email, the worm sends a second message to the same person, attaching a copy of itself using a randomly generated file name. Removal instructions: To remove the W95.Hybris.gen worm, follow these steps: 1. Run LiveUpdate to ensure that you have the most recent virus definitions. They must be dated September 25, 2000, or later. 2. Start NAV, and perform a full system scan. Make sure that NAV is set to scan all files. When an infected file is detected, do the following: When Wsock32.dll is detected as infected, choose Repair. In most cases, NAV can repair this file. If NAV cannot repair the file, then you will need to replace it from the Windows installation CD. If you need to replace this file, see the instructions in the next section. NOTE: If NAV cannot repair Wsock32.dll when Windows is in normal mode, then try to repair it in Safe Mode. This is particularly true if you are connected to a network; in this case you may see a "sharing violation" message when NAV attempts the repair. To try this, restart the computer in Safe Mode. If this is not successful, then you must extract a new copy as explained in the next section. Delete all other detected files; their contents have been overwritten by the worm. You must restore them from backups or, in the case of application software, reinstall the programs. 3. If you see a rotating spiral on the Windows desktop, you must follow additional steps to remove it. See the section To remove the rotating spiral. To extract a new copy of the Wsock32.dll file: This is necessary only if Wsock32.dll cannot be repaired. You need to use the Extract command at a DOS prompt. Follow these steps to do this, using the instructions for your operating system. NOTES: Have the Windows installation CD available. When typing the command, substitute the appropriate drive letter for your CD-ROM drive for the letter x. For example, if you are using Windows 98, and the CD-ROM drive is the drive D, then you would type extract /a d:\win98\precopy1.cab wsock32.dll /L c:\windows\system If Windows is installed in a folder other than C:\Windows, then substitute the appropriate path or folder name in the last part of the command that refers to the \Windows\System folder. For detailed instructions on using the Extract command, see the Microsoft document How to Extract Original Compressed Windows Files, Article ID: Q129605. As a somewhat easier alternative to the following procedure, if you are using Windows 98, then you can use the System File Checker to restore the file. For information on how to do this, see your Windows documentation. 1. Do one of the following: Windows 95/98 users: Click Start, point to Programs, and click MS-DOS Prompt. A DOS window appears. Windows Me users: Click Start, point to Programs, point to Accessories, and click MS-DOS Prompt. A DOS window appears. 2. Type the command that applies to your operating system: If you are using Windows 98, then type the following and press Enter: extract /a x:\win98\precopy1.cab wsock32.dll /L c:\windows\system If you are using Windows 95, then type the following and press Enter: extract /a x:\win95\win95_02.cab wsock32.dll /L c:\windows\system 3. If you see an error message of any kind, then repeat step 2, making sure that you typed the correct command for your operating system and that you typed it exactly as shown. Otherwise, type exit and then press Enter. To remove the rotating spiral: W95.Hybris.Gen uses several different plug-ins. The most common is a large, rotating spiral. If you see this on the Windows desktop, follow the instructions in the document W95.Hybris.Plugin.