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| How to remove W32.Rispif.A |
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| Author:W32.Rispif.A Hits: UpdateTime:2008-8-20 9:01:31 |
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For remove W32.Rispif.A virus,please clean/delete all W32.Rispif.A infected files and Delete/Modify any values W32.Rispif.A added to the registry as following:
Once executed, the worm creates some of the following files:
- C:\lo.tmp
- %SYSTEM%\wuauclt.exe
- %SYSTEM%\dllcache\wuauclt.exe
- %SYSTEM%\wsotdet.dll
- %SYSTEM%\wssndet.dll
It spreads across fixed and removable drives from C-Z by creating some of the following files:
- C:\AUTORUN.INF
- C:\RIS.PIF (copy of the worm)
- C:\RVS.PIF (copy of the worm)
The worm creates the following registry entry, so that it runs every time Windows starts:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\explorer\run\"explorer" = "%System%\wuauclt.exe"
It creates the following mutex so only one instance of the worm is running on the compromised computer:
CNNLAST
It then changes the system date by setting the year back to 2004.
The worm temporarily overwrites the following file to run a kernel mode component:
%System%\drivers\beep.sys
The kernel mode component is detected as Hacktool.Rootkit and it uses rootkit functionalities to restore KeServiceDescriptorTable to the original values and disable security softwares.
It runs the Windows CACLS.EXE tool to change permissions for the following files and enables the use of WinPCAP libraries to any user on the compromised computer:
- c:\windows\system32\packet.dll
- c:\windows\system32\pthreadVNC.dll
- c:\windows\system32\drivers\npf.sys
- c:\windows\system32\drivers\npptools.dll
- c:\windows\system32\drivers\acpidisk.sys
- c:\windows\system32\drivers\wanpacket
The worm may perform ARP injection or may download a component to do so.
It modifies the following registry entries to disable security programs and tools:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360rpt.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360safe.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360safebox.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\360tray.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ANTIARP.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Ast.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AutoRunKiller.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AvMonitor.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AVP.COM\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AVP.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\CCenter.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Frameworkservice.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\GFUpd.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\GuardField.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\IceSword.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Iparmor.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KASARP.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KAVPFW.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kavstart.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kmailmon.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KRegEx.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVMonxp.KXP\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVSrvXP.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\KVWSC.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kwatch.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Mmsk.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Navapsvc.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\nod32krn.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Nod32kui.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RAV.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\RavStub.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Regedit.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwmain.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwProxy.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwsrv.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rfwstub.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Runiep.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\safeboxTray.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\SREngLdr.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\VPC32.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\VPTRAY.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\WOPTILITIES.EXE\"debugger" = "%System%\dllcache\wuauclt.exe"
It tries to end the following processes which may be security-related:
- 360rpt.exe
- 360Safe.exe
- 360tray.exe
- AntiArp.exe
- Avp.exe
- CCenter.exe
- FrameworkService.exe
- GFUpd.exe
- GuardField.exe
- Iparmor.exe
- KASARP.exe
- KAVPFW.EXE
- kavstart.exe
- kmailmon.exe
- KRegEx.exe
- kvsrvxp.exe
- kvsrvxp.kxp
- KVWSC.EXE
- KvXP.kxp
- kwatch.exe
- nod32krn.exe
- nod32kui.exe
- Rav.exe
- RAVMON.exe
- RavStub.exe
- Ravxp.exe
- rfwmain.exe
- rfwProxy.exe
- rfwsrv.exe
- rfwstub.exe
- Runiep.exe
- scan32.exe
- TBMon.exe
- UpdaterUI.exe
- VPC32.exe
- VPTRAY.exe
- VsTskMgr.exe
It tries to delete the following services related to security products:
- KPfwSvc
- KWhatchsvc
- McAfee Framework
- McShield
- Norton Antivirus Server
- Symantec Antivirus
- Symantec Antivirus Definition Watcher
- Symantec Antivirus Drivers Services
It modifies the following registry entry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\"SHOWALL" = "2"
It deletes the following registry subkeys to prevent the compromised computer restarting in Safe Mode:
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\{4D36E967-E325-11CE-BFC1-08002BE10318}
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Network\{4D36E967-E325-11CE-BFC1-08002BE10318}
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{4D36E967-E325-11CE-BFC1-08002BE10318}
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{4D36E967-E325-11CE-BFC1-08002BE10318}
Users may then experience any of the following messages while trying to restart the computer in Safe Mode:
- blue-screen
- network problems
- error: "STOP: 0x0000007B"
It runs a hidden Internet Explorer windows to download and install the following malicious files:
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/[REMOVED]
- [http://]m.d5x8.com/dd/10.[REMOVED]
The files are downloaded and saved as the following files:
- C:\Documents and Settings\All Users\1.pif
- C:\Documents and Settings\All Users\2.pif
- C:\Documents and Settings\All Users\3.pif
- C:\Documents and Settings\All Users\4.pif
- C:\Documents and Settings\All Users\5.pif
- C:\Documents and Settings\All Users\6.pif
- C:\Documents and Settings\All Users\7.pif
- C:\Documents and Settings\All Users\8.pif
- C:\Documents and Settings\All Users\9.pif
- C:\Documents and Settings\All Users\10.pif
- C:\Documents and Settings\All Users\ms.pif
RecommendationsSymantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
- Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
- If a blended threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
- Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services (for example, all Windows-based computers should have the current Service Pack installed.). Additionally, please apply any security updates that are mentioned in this writeup, in trusted Security Bulletins, or on vendor Web sites.
- Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
- Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
- Isolate infected computers quickly to prevent further compromising your organization. Perform a forensic analysis and restore the computers using trusted media.
- Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
For successful remove W32.Rispif.A virus,you may also need do as following:
1. Temporarily Disable System Restore .
2. Update the virus definitions. Reboot computer in SafeMode;
3. Delete the IE temp files,some W32.Rispif.A temp file exisit there.
4.If you failed to remove W32.Rispif.A,please go to our remove help forum:http://help.antiviruses123.com
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| End Of The Article How to remove W32.Rispif.A remove process |
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