msctl32.dll - Dangerous
%sysdir%\msctl32.dll
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My PC had gotten a bad rootkit that my ISP antivirus software (powered by McAfee) could not detect, nor could fix.
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Manual removal instructions:
MSCTL32.DLL opens a back door on random TCP port.
MSCTL32.DLL is used to hide files, processes and registry.
MSCTL32.DLL is a kernel mode rootkit.
Rootkit injects itself into the winlogon.exe process.
Rootkit contacts remote hacker server using HTTP session.
Related files:
%SysDir%\drivers\I386P.SYS
%SysDir%\MSCTL32.DLL
I386P.SYS is created new system drivers:
service name: " wincom32"
Adds the value:
"Asynchronous" = "1"
"DllName" = "[NAME_OF_TROJAN_DLL].DLL"
"Impersonate" = "0"
"Startup" = "Startup"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
Winlogon\Notify\msctl32.dll
to the Windows startup registry keys.