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How to Recover from Blaster virus [was Updated W32.Blaster.worm Alert]
This article wraps everything up quite nicely, including how to remove
the infection without wiping out your system. Good job. The only thing I would add is that if you can't keep your system up long enough to read and follow these directions, try killing the msblast.exe process using Task Manager. This should give you sufficient time. If you reboot before cleaning, kill it again. -- Kent W. England, Microsoft MVP for Windows "Jerry Bryant [MSFT]" wrote in message ... PSS Security Response Team Alert - New Virus: W32.Blaster.worm Update SEVERITY: CRITICAL DATE: August 12, 2003 PRODUCTS AFFECTED: Windows XP, Windows 2000, Windows Server 2003, Windows NT 4.0, NT 4.0 Terminal Services Edition Update: PSS Security has updated the recovery procedures in this bulletin. Windows 9X operating systems are not affected by this virus. ************************************************** ******************** PRODUCTS AFFECTED: Windows XP, Windows 2000, Windows Server 2003, Windows NT 4.0, NT 4.0 Terminal Services Edition WHAT IS IT? The Microsoft Product Support Services Security Team is issuing this alert to inform customers about a new worm named W32.Blaster.Worm which is spreading in the wild. This virus is also known as: W32/Lovsan.worm (McAfee), WORM_MSBLAST.A (Trendmicro), Win32.Posa.Worm (Computer Associates). Best practices, such as applying security patch MS03-026 should prevent infection from this worm. Date discovered: August 11, 2003. Customers who had previously applied the security patch MS03-026 are protected. To deterimine if the virus is present on your machine see the technical details below. IMPACT OF ATTACK: Spread through open RPC ports. Customer's machine gets re-booted or the file "msblast.exe" exists on customer's system. TECHNICAL DETAILS: This worm scans a random IP range to look for vulnerable systems on TCP port 135. The worm attempts to exploit the DCOM RPC vulnerability patched by MS03-026. Once the Exploit code is sent to a system, it downloads and executes the file MSBLAST.EXE from a remote system via TFTP. Once run, the worm creates the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Run "windows auto update" = msblast.exe I just want to say LOVE YOU SAN!! bill Symptoms of the virus: Some customers may not notice any symptoms at all. A typical symptom is the system is rebooting every few minutes without user input. Customers may also see: - Presence of unusual TFTP* files - Presence of the file msblast.exe in the WINDOWS SYSTEM32 directory To detect this virus, search for msblast.exe in the WINDOWS SYSTEM32 directory or download the latest anti-virus software signature from your anti-virus vendor and scan your machine. For additional information on recovering from this attack please contact your preferred anti-virus vendor. RECOVERY: Security best practices suggest that previously compromised machines be wiped and rebuilt to eliminate any undiscovered exploits that can lead to a future compromise. See Cert Advisory: Steps for Recovering from a UNIX or NT System Compromise. http://www.cert.org/tech_tips/win-UN...ompromise.html However, many Anti-Virus companies have written tools to remove the known exploit associated with this particular worm. To download the removal tool from your antivirus vendor follow procedures outlined below. For Windows XP 1. First, enable the built in firewall such as Internet Connection Firewall (ICF) in Windows XP: http://support.microsoft.com/?id=283673 --In Control Panel, double-click "Networking and Internet Connections", and then click "Network Connections". --Right-click the connection on which you would like to enable ICF, and then click "Properties". --On the Advanced tab, click the box to select the option to "Protect my computer or network". 2. Second, download the MS03-026 security patch from Microsoft: Windows XP (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe 3. Third, install or update your antivirus signature software 4. Then, download the worm removal tool from your antivirus vendor. For Windows 2000 systems, where Internet Connection Firewall (ICF) is not available, the following steps will help block the affected ports so that the system can be patched. These steps are based on a modified excerpt from the article; HOW TO: Configure TCP/IP Filtering in Windows 2000. http://support.microsoft.com/?id=309798 1. Configure TCP/IP security on Windows 2000: --Select "Network and Dial-up Connections" in the control panel. --Right-click the interface you use to access the Internet, and then click "Properties". --In the "Components checked are used by this connection" box, click "Internet Protocol (TCP/IP)", and then click "Properties". --In the Internet Protocol (TCP/IP) Properties dialog box, click "Advanced". --Click the "Options" tab. --Click "TCP/IP filtering", and then click "Properties". --Select the "Enable TCP/IP Filtering (All adapters)" check box. --There are three columns with the following labels: TCP Ports UDP Ports IP Protocols --In each column, you must select the "Permit Only" option. --Click OK. 2. Download the MS03-026 security patch for Windows 2000 from Microsoft at: http://download.microsoft.com/downlo...80-x86-ENU.exe 3. Install or update your antivirus signature software 4. Then, download the worm removal tool from your antivirus vendor. For additional details on this worm from anti-virus software vendors participating in the Microsoft Virus Information Alliance (VIA) please visit the following links: Network Associates: http://us.mcafee.com/virusInfo/defau...virus_k=100547 Trend Micro: http://www.trendmicro.com/vinfo/viru...WORM_MSBLAST.A Symantec: http://securityresponse.symantec.com...ster.worm.html Computer Associates: http://www3.ca.com/virusinfo/virus.aspx?ID=36265 For more information on Microsoft's Virus Information Alliance please visit this link: http://www.microsoft.com/technet/security/virus/via.asp As always, please make sure to use the latest Anti-Virus detection software signature from your Anti-Virus vendor to detect new viruses and their variants. PREVENTION: Turn on Internet Connection Firewall (Windows XP or Windows Server 2003) or use a third party firewall to block TCP ports 135, 139, 445 and 593; UDP port 135, 137,138; also UDP 69 (TFTP) and TCP 4444 for remote command shell. To enable the Internet Connection Firewall in Windows: http://support.microsoft.com/?id=283673 -In Control Panel, double-click Networking and Internet Connections, and then click Network Connections. -Right-click the connection on which you would like to enable ICF, and then click Properties. -On the Advanced tab, click the box to select the option to "Protect my computer or network". This worm utilizes a previously-announced vulnerability as part of its infection method. Because of this, customers must ensure that their computers are patched for the vulnerability that is identified in Microsoft Security Bulletin MS03-026. http://www.microsoft.com/technet/sec.../MS03-026.asp. Install the patch MS03-026 from Windows Update: Windows NT 4 Server & Workstation http://download.microsoft.com/downlo...a/Q823980i.EXE Windows NT 4 Terminal Server Edition http://download.microsoft.com/downlo...9/Q823980i.EXE Windows 2000 http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe Windows 2003 (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows 2003 (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe As always, please make sure to use the latest Anti-Virus detection from your Anti-Virus vendor to detect new viruses and their variants. RELATED MICROSOFT SECURITY BULLETINS: http://www.microsoft.com/technet/sec...n/MS03-026.asp RELATED KB ARTICLES: http://support.microsoft.com/?kbid=826955 This article will be available within 24 hours. RELATED LINKS: http://www.microsoft.com/security/incident/blast.asp If you have any questions regarding this alert please contact your Technical Account Manager or Application Development Consultant. PSS Security Response Team If you have any questions regarding this alert please contact your Microsoft representative or 1-866-727-2338 (1-866-PCSafety) within the US, outside of the US please contact your local Microsoft Subsidiary. Support for virus related issues can also be obtained from the Microsoft Virus Support Newsgroup which can be located by clicking on the following link news://msnews.microsoft.com/microsof...ecurity.virus. PSS Security Response Team -- Regards, Jerry Bryant - MCSE, MCDBA Microsoft IT Communities Get Secure! www.microsoft.com/security This posting is provided "AS IS" with no warranties, and confers no rights. |
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How to Recover from Blaster virus [was Updated W32.Blaster.worm Alert]
If you are having trouble staying up.
When the shutdown prompt appears,go to start/run and type shutdown -a to abort the shutdown process to allow you to stay up and online. http://www.kellys-korner-xp.com/xp_qr.htm#rpc There are 2 more variants out now. The exes for the variants are teekids.exe and penis32.exe Kelly's script kills all 3 variants. -- Larry Samuels MS-MVP (Windows-Shell/User) Associate Expert Unofficial FAQ for Windows Server 2003 at http://home.earthlink.net/~larrysamuels/WS2003FAQ.htm Expert Zone - www.microsoft.com/windowsxp/expertzon "Kent W. England [MVP]" wrote in message ... This article wraps everything up quite nicely, including how to remove the infection without wiping out your system. Good job. The only thing I would add is that if you can't keep your system up long enough to read and follow these directions, try killing the msblast.exe process using Task Manager. This should give you sufficient time. If you reboot before cleaning, kill it again. -- Kent W. England, Microsoft MVP for Windows "Jerry Bryant [MSFT]" wrote in message ... PSS Security Response Team Alert - New Virus: W32.Blaster.worm Update SEVERITY: CRITICAL DATE: August 12, 2003 PRODUCTS AFFECTED: Windows XP, Windows 2000, Windows Server 2003, Windows NT 4.0, NT 4.0 Terminal Services Edition Update: PSS Security has updated the recovery procedures in this bulletin. Windows 9X operating systems are not affected by this virus. ************************************************** ******************** PRODUCTS AFFECTED: Windows XP, Windows 2000, Windows Server 2003, Windows NT 4.0, NT 4.0 Terminal Services Edition WHAT IS IT? The Microsoft Product Support Services Security Team is issuing this alert to inform customers about a new worm named W32.Blaster.Worm which is spreading in the wild. This virus is also known as: W32/Lovsan.worm (McAfee), WORM_MSBLAST.A (Trendmicro), Win32.Posa.Worm (Computer Associates). Best practices, such as applying security patch MS03-026 should prevent infection from this worm. Date discovered: August 11, 2003. Customers who had previously applied the security patch MS03-026 are protected. To deterimine if the virus is present on your machine see the technical details below. IMPACT OF ATTACK: Spread through open RPC ports. Customer's machine gets re-booted or the file "msblast.exe" exists on customer's system. TECHNICAL DETAILS: This worm scans a random IP range to look for vulnerable systems on TCP port 135. The worm attempts to exploit the DCOM RPC vulnerability patched by MS03-026. Once the Exploit code is sent to a system, it downloads and executes the file MSBLAST.EXE from a remote system via TFTP. Once run, the worm creates the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Run "windows auto update" = msblast.exe I just want to say LOVE YOU SAN!! bill Symptoms of the virus: Some customers may not notice any symptoms at all. A typical symptom is the system is rebooting every few minutes without user input. Customers may also see: - Presence of unusual TFTP* files - Presence of the file msblast.exe in the WINDOWS SYSTEM32 directory To detect this virus, search for msblast.exe in the WINDOWS SYSTEM32 directory or download the latest anti-virus software signature from your anti-virus vendor and scan your machine. For additional information on recovering from this attack please contact your preferred anti-virus vendor. RECOVERY: Security best practices suggest that previously compromised machines be wiped and rebuilt to eliminate any undiscovered exploits that can lead to a future compromise. See Cert Advisory: Steps for Recovering from a UNIX or NT System Compromise. http://www.cert.org/tech_tips/win-UN...ompromise.html However, many Anti-Virus companies have written tools to remove the known exploit associated with this particular worm. To download the removal tool from your antivirus vendor follow procedures outlined below. For Windows XP 1. First, enable the built in firewall such as Internet Connection Firewall (ICF) in Windows XP: http://support.microsoft.com/?id=283673 --In Control Panel, double-click "Networking and Internet Connections", and then click "Network Connections". --Right-click the connection on which you would like to enable ICF, and then click "Properties". --On the Advanced tab, click the box to select the option to "Protect my computer or network". 2. Second, download the MS03-026 security patch from Microsoft: Windows XP (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe 3. Third, install or update your antivirus signature software 4. Then, download the worm removal tool from your antivirus vendor. For Windows 2000 systems, where Internet Connection Firewall (ICF) is not available, the following steps will help block the affected ports so that the system can be patched. These steps are based on a modified excerpt from the article; HOW TO: Configure TCP/IP Filtering in Windows 2000. http://support.microsoft.com/?id=309798 1. Configure TCP/IP security on Windows 2000: --Select "Network and Dial-up Connections" in the control panel. --Right-click the interface you use to access the Internet, and then click "Properties". --In the "Components checked are used by this connection" box, click "Internet Protocol (TCP/IP)", and then click "Properties". --In the Internet Protocol (TCP/IP) Properties dialog box, click "Advanced". --Click the "Options" tab. --Click "TCP/IP filtering", and then click "Properties". --Select the "Enable TCP/IP Filtering (All adapters)" check box. --There are three columns with the following labels: TCP Ports UDP Ports IP Protocols --In each column, you must select the "Permit Only" option. --Click OK. 2. Download the MS03-026 security patch for Windows 2000 from Microsoft at: http://download.microsoft.com/downlo...80-x86-ENU.exe 3. Install or update your antivirus signature software 4. Then, download the worm removal tool from your antivirus vendor. For additional details on this worm from anti-virus software vendors participating in the Microsoft Virus Information Alliance (VIA) please visit the following links: Network Associates: http://us.mcafee.com/virusInfo/defau...virus_k=100547 Trend Micro: http://www.trendmicro.com/vinfo/viru...WORM_MSBLAST.A Symantec: http://securityresponse.symantec.com...ster.worm.html Computer Associates: http://www3.ca.com/virusinfo/virus.aspx?ID=36265 For more information on Microsoft's Virus Information Alliance please visit this link: http://www.microsoft.com/technet/security/virus/via.asp As always, please make sure to use the latest Anti-Virus detection software signature from your Anti-Virus vendor to detect new viruses and their variants. PREVENTION: Turn on Internet Connection Firewall (Windows XP or Windows Server 2003) or use a third party firewall to block TCP ports 135, 139, 445 and 593; UDP port 135, 137,138; also UDP 69 (TFTP) and TCP 4444 for remote command shell. To enable the Internet Connection Firewall in Windows: http://support.microsoft.com/?id=283673 -In Control Panel, double-click Networking and Internet Connections, and then click Network Connections. -Right-click the connection on which you would like to enable ICF, and then click Properties. -On the Advanced tab, click the box to select the option to "Protect my computer or network". This worm utilizes a previously-announced vulnerability as part of its infection method. Because of this, customers must ensure that their computers are patched for the vulnerability that is identified in Microsoft Security Bulletin MS03-026. http://www.microsoft.com/technet/sec.../MS03-026.asp. Install the patch MS03-026 from Windows Update: Windows NT 4 Server & Workstation http://download.microsoft.com/downlo...a/Q823980i.EXE Windows NT 4 Terminal Server Edition http://download.microsoft.com/downlo...9/Q823980i.EXE Windows 2000 http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows XP (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe Windows 2003 (32 bit) http://download.microsoft.com/downlo...80-x86-ENU.exe Windows 2003 (64 bit) http://download.microsoft.com/downlo...0-ia64-ENU.exe As always, please make sure to use the latest Anti-Virus detection from your Anti-Virus vendor to detect new viruses and their variants. RELATED MICROSOFT SECURITY BULLETINS: http://www.microsoft.com/technet/sec...n/MS03-026.asp RELATED KB ARTICLES: http://support.microsoft.com/?kbid=826955 This article will be available within 24 hours. RELATED LINKS: http://www.microsoft.com/security/incident/blast.asp If you have any questions regarding this alert please contact your Technical Account Manager or Application Development Consultant. PSS Security Response Team If you have any questions regarding this alert please contact your Microsoft representative or 1-866-727-2338 (1-866-PCSafety) within the US, outside of the US please contact your local Microsoft Subsidiary. Support for virus related issues can also be obtained from the Microsoft Virus Support Newsgroup which can be located by clicking on the following link news://msnews.microsoft.com/microsof...ecurity.virus. PSS Security Response Team -- Regards, Jerry Bryant - MCSE, MCDBA Microsoft IT Communities Get Secure! www.microsoft.com/security This posting is provided "AS IS" with no warranties, and confers no rights. |
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