Friday
2008-11-29, 19:47
The following instructions have been created to help you to get rid of "IRC.Zapchast" 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
Description:
This trojan horse pretends to be a legit application. It runs a compromised version of the mirc IRC software and connects as a server in background. The trojan horse waits for incoming commands to harm the computer. IRC.Zapchast installs IRC server scripts and configuration files that allow the infected machine to be used as a server. Certain IRC channels specified in the configuration files connect to the server, making the infected machine vulnerable to remote attackers. IRC.Zapchast is spread by email spam with a link purporting to be a postcard for the user.
Removal Instructions:
Autorun:
Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd), RunAlyzer (http://www.safer-networking.org/index.php?page=runalyzer) or msconfig.exe to remove the following autorun entries.
Entries named "IExplorer" and pointing to "C:\WINDOWS\system32\explorer.exe".
Entries named "taskmgr" and pointing to "C:\WINNT\system32\explorer.exe".
Entries named "Window".
Entries named "GNP Generic Host Process" and pointing to "C:\WINDOWS\system\svchost.exe".
Entries named "GNP Generic Host Process" and pointing to "C:\WINDOWS\system\svchost.exe".
Files:
Please use Windows Explorer or another file manager of your choice to locate and delete these files.
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\ident.txt".
The file at "c:\WINDOWS\system\sup.bat".
The file at "<$SYSDIR>\control.ini".
The file at "<$SYSDIR>\explorer.exe".
The file at "<$SYSDIR>\fullname.txt".
The file at "<$SYSDIR>\identd.txt".
The file at "<$SYSDIR>\perform.ini".
The file at "<$SYSDIR>\script.ini".
The file at "<$SYSDIR>\sup.bat".
The file at "<$SYSDIR>\sup.reg".
The file at "<$SYSDIR>\users.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\aliases.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\control.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\dmon.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\dos.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\ident.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\isim.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\Msvbvm60.dll".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\netdep.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\nick.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\perform.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\reg.exe".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\remote.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\script.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\script2.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\SCRNCAM.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\servers.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\umon.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\Vb6fr.dll".
A file with an unknown location named "mirc.exe".
A file with an unknown location named "reg.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\control.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\fullname.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\hex.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\ident.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\mirc.GID".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\mirc.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\nicks.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\perform.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\regedit".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\remote.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\rundll.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\script.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\servers.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\users.ini".
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\nicks.txt".
The file at "c:\WINDOWS\system\dll.exe"dll.exe".
The file at "c:\WINDOWS\system\aliases.ini".
The file at "c:\WINDOWS\system\control.ini".
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\ident.txt".
The file at "c:\WINDOWS\system\mirc.ico".
The file at "c:\WINDOWS\system\mirc.ini".
The file at "c:\WINDOWS\system\nicks.txt".
The file at "c:\WINDOWS\system\popups.txt".
The file at "c:\WINDOWS\system\remote.ini".
The file at "c:\WINDOWS\system\script.ini".
The file at "c:\WINDOWS\system\servers.ini".
The file at "c:\WINDOWS\system\sup.bat".
The file at "c:\WINDOWS\system\sup.reg".
The file at "c:\WINDOWS\system\svchost.exe".
The file at "c:\WINDOWS\system\users.ini".
The file at "<$WINDIR>\system\admdll.dll".
The file at "<$WINDIR>\system\registry.dll".
The file at "<$WINDIR>\system\svhost.exe".
The file at "<$WINDIR>\userinit.exe".
A file with an unknown location named "svchost.exe".
A file with an unknown location named "svchost.exe".
Make sure you set your file manager to display hidden and system files. If IRC.Zapchast uses rootkit technologies, use our RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify files!
Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd) to remove them.
Folders:
Please use Windows Explorer or another file manager of your choice to locate and delete these folders.
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp".
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp\logs".
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp\sounds".
The directory at "c:\windows\system32\drivers\nVIDIA".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\download".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\logs".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\sounds".
Make sure you set your file manager to display hidden and system files. If IRC.Zapchast uses rootkit technologies, use our RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify folders!
Registry:
You can use regedit.exe (included in Windows) to locate and delete these registry entries.
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
If IRC.Zapchast 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).
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.
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
Description:
This trojan horse pretends to be a legit application. It runs a compromised version of the mirc IRC software and connects as a server in background. The trojan horse waits for incoming commands to harm the computer. IRC.Zapchast installs IRC server scripts and configuration files that allow the infected machine to be used as a server. Certain IRC channels specified in the configuration files connect to the server, making the infected machine vulnerable to remote attackers. IRC.Zapchast is spread by email spam with a link purporting to be a postcard for the user.
Removal Instructions:
Autorun:
Please use Spybot-S&D (http://www.safer-networking.org/index.php?page=spybotsd), RunAlyzer (http://www.safer-networking.org/index.php?page=runalyzer) or msconfig.exe to remove the following autorun entries.
Entries named "IExplorer" and pointing to "C:\WINDOWS\system32\explorer.exe".
Entries named "taskmgr" and pointing to "C:\WINNT\system32\explorer.exe".
Entries named "Window".
Entries named "GNP Generic Host Process" and pointing to "C:\WINDOWS\system\svchost.exe".
Entries named "GNP Generic Host Process" and pointing to "C:\WINDOWS\system\svchost.exe".
Files:
Please use Windows Explorer or another file manager of your choice to locate and delete these files.
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\ident.txt".
The file at "c:\WINDOWS\system\sup.bat".
The file at "<$SYSDIR>\control.ini".
The file at "<$SYSDIR>\explorer.exe".
The file at "<$SYSDIR>\fullname.txt".
The file at "<$SYSDIR>\identd.txt".
The file at "<$SYSDIR>\perform.ini".
The file at "<$SYSDIR>\script.ini".
The file at "<$SYSDIR>\sup.bat".
The file at "<$SYSDIR>\sup.reg".
The file at "<$SYSDIR>\users.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\aliases.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\control.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\dmon.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\dos.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\ident.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\isim.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\Msvbvm60.dll".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\netdep.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\nick.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\perform.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\reg.exe".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\remote.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\script.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\script2.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\SCRNCAM.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\servers.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\umon.ini".
The file at "<$LOCALSETTINGS>\Temp\TMP0.tmp\Vb6fr.dll".
A file with an unknown location named "mirc.exe".
A file with an unknown location named "reg.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\control.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\fullname.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\hex.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\ident.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\mirc.GID".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\mirc.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\nicks.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\perform.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\regedit".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\remote.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\rundll.exe".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\script.ini".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\servers.txt".
The file at "c:\windows\system32\drivers\nVIDIA\DLL\users.ini".
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\nicks.txt".
The file at "c:\WINDOWS\system\dll.exe"dll.exe".
The file at "c:\WINDOWS\system\aliases.ini".
The file at "c:\WINDOWS\system\control.ini".
The file at "c:\WINDOWS\system\fullname.txt".
The file at "c:\WINDOWS\system\ident.txt".
The file at "c:\WINDOWS\system\mirc.ico".
The file at "c:\WINDOWS\system\mirc.ini".
The file at "c:\WINDOWS\system\nicks.txt".
The file at "c:\WINDOWS\system\popups.txt".
The file at "c:\WINDOWS\system\remote.ini".
The file at "c:\WINDOWS\system\script.ini".
The file at "c:\WINDOWS\system\servers.ini".
The file at "c:\WINDOWS\system\sup.bat".
The file at "c:\WINDOWS\system\sup.reg".
The file at "c:\WINDOWS\system\svchost.exe".
The file at "c:\WINDOWS\system\users.ini".
The file at "<$WINDIR>\system\admdll.dll".
The file at "<$WINDIR>\system\registry.dll".
The file at "<$WINDIR>\system\svhost.exe".
The file at "<$WINDIR>\userinit.exe".
A file with an unknown location named "svchost.exe".
A file with an unknown location named "svchost.exe".
Make sure you set your file manager to display hidden and system files. If IRC.Zapchast uses rootkit technologies, use our RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify 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.
Folders:
Please use Windows Explorer or another file manager of your choice to locate and delete these folders.
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp".
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp\logs".
The directory at "<$LOCALSETTINGS>\Temp\TMP0.tmp\sounds".
The directory at "c:\windows\system32\drivers\nVIDIA".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\download".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\logs".
The directory at "c:\windows\system32\drivers\nVIDIA\DLL\sounds".
Make sure you set your file manager to display hidden and system files. If IRC.Zapchast uses rootkit technologies, use our RootAlyzer (http://forums.spybot.info/downloads.php?id=8) or our Total Commander anti-rootkit plugins (http://forums.spybot.info/downloads.php?id=3).
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify folders!
Registry:
You can use regedit.exe (included in Windows) to locate and delete these registry entries.
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<$LOCALSETTINGS>\Temp\TMP0.tmp\mirc.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "C:\WINDOWS\system\svchost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
Delete the registry value "<WINDIR>\system\svhost.exe" at "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\".
If IRC.Zapchast 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).
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.