Friday
2010-10-14, 12:11
The following instructions have been created to help you to get rid of "Backdoor.Juan" manually.
Use this guide at your own risk; software should usually be better suited to remove malware, since it is able to look deeper.
If this guide was helpful to you, please consider donating towards this site (http://www.safer-networking.org/index.php?page=donate).
Threat Details:
Categories:
trojan
securityrisk
bho
Description:
Backdoor.Juan ist a Trojan horse that installs itself as a Browser Helper Object (BHO). It also disables the Windows system restore and deletes the restore points. While installed as a BHO it gets started in background whenever the Internet Explorer gets started.
Removal Instructions:
Files:
Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd) to remove them.
Registry:
You can use regedit.exe (included in Windows) to locate and delete these registry entries.
Delete the registry key "{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}" at "HKEY_CLASSES_ROOT\CLSID\".
Delete the registry key "{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}" at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\".
Delete the registry key "{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}" at "HKEY_CLASSES_ROOT\CLSID\".
Delete the registry key "{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}" at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\".
Remove "<regexpr><$FIXEDDRIVES>\\((.*\\)(\S ))\.dll" from registry value "" at "HKEY_CLASSES_ROOT\CLSID\{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}\InprocServer32\".
Remove "<regexpr><$FIXEDDRIVES>\\((.*\\)(\S ))\.dll" from registry value "" at "HKEY_CLASSES_ROOT\CLSID\{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}\InprocServer32\".
If Backdoor.Juan uses rootkit technologies, use our RegAlyzer (http://www.safer-networking.org/index.php?page=regalyzer), RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
Browser:
There are more browser plugins or items that cannot be safely described in simple words. Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd) to remove them.
Final Words:
If neither Spybot-S&D nor self help did resolve the issue or you would prefer one on one help,
Please read these instructions (http://forums.spybot.info/showthread.php?t=288) before requesting assistance,
Then start your own thread in the Malware Removal Forum (http://forums.spybot.info/forumdisplay.php?f=22) where a volunteer analyst will advise you as soon as available.
There are more files or system entries belonging to this product that <$SPYBOTSD> can remove, but that cannot be easily described in text. Please use <$SPYBOTSD> to make sure <$PRODUCTNAME> gets completely removed.
Use this guide at your own risk; software should usually be better suited to remove malware, since it is able to look deeper.
If this guide was helpful to you, please consider donating towards this site (http://www.safer-networking.org/index.php?page=donate).
Threat Details:
Categories:
trojan
securityrisk
bho
Description:
Backdoor.Juan ist a Trojan horse that installs itself as a Browser Helper Object (BHO). It also disables the Windows system restore and deletes the restore points. While installed as a BHO it gets started in background whenever the Internet Explorer gets started.
Removal Instructions:
Files:
Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd) to remove them.
Registry:
You can use regedit.exe (included in Windows) to locate and delete these registry entries.
Delete the registry key "{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}" at "HKEY_CLASSES_ROOT\CLSID\".
Delete the registry key "{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}" at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\".
Delete the registry key "{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}" at "HKEY_CLASSES_ROOT\CLSID\".
Delete the registry key "{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}" at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\".
Remove "<regexpr><$FIXEDDRIVES>\\((.*\\)(\S ))\.dll" from registry value "" at "HKEY_CLASSES_ROOT\CLSID\{68D5CF1D-EC5C-4BDD-A9EF-F0E517565D50}\InprocServer32\".
Remove "<regexpr><$FIXEDDRIVES>\\((.*\\)(\S ))\.dll" from registry value "" at "HKEY_CLASSES_ROOT\CLSID\{E03C740E-BB24-4d3c-B92A-6F84DE1DD99C}\InprocServer32\".
If Backdoor.Juan uses rootkit technologies, use our RegAlyzer (http://www.safer-networking.org/index.php?page=regalyzer), RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
Browser:
There are more browser plugins or items that cannot be safely described in simple words. Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd) to remove them.
Final Words:
If neither Spybot-S&D nor self help did resolve the issue or you would prefer one on one help,
Please read these instructions (http://forums.spybot.info/showthread.php?t=288) before requesting assistance,
Then start your own thread in the Malware Removal Forum (http://forums.spybot.info/forumdisplay.php?f=22) where a volunteer analyst will advise you as soon as available.
There are more files or system entries belonging to this product that <$SPYBOTSD> can remove, but that cannot be easily described in text. Please use <$SPYBOTSD> to make sure <$PRODUCTNAME> gets completely removed.