| Callgate removal| Spyware Callgate Information |
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Name: Callgate
Category: Vulnerability
Date: 1997-04-28
Author: Prasad Dabak & Sandeep Phadke & Milind Borate
Dangerous: Yes |
Callgate is one of Vulnerability spywares.
Finding it on your computer means that your computer is infected with Vulnerability and crucial data could be endangered or even lost.
Callgate description by Prasad Dabak & Sandeep Phadke & Milind Borate: Vendor: ´Run any Ring 0 code from a WIN32 program on Windows NT Callgate is a mechanism of operated ring transfers (privilege level transfers) on INTEL processors. There are ways to implement callgate mechanism under Windows 3.1 & Windows 95. Refer to MSDN articles ´Run Privileged Code from Your Windows-based Applications Using Call Gates´ by Matt Pietrek (MSJ May 1993) for Win3.1 implementation. Refer to PHYS application in Matt Pietrek´s excellent ´Win95System Applicationming Secrets´. We´re providing here an equivalent mechanism under Windows NT 3.51 & 4.0. We provide the reader with an API, driver & a DLL to directly try out this mechanism. This is the best known mechanism to execute privileged instructions WITHOUT having to write a NT kernel mode device driver. You can directly link with our general purpose DLL & execute Ring 0 code.´
This Vulnerability is also known as: •Win95/Henky.Adonai.A.Callgate!Tr - named by Computer Associates.
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| Callgate Removal Instructions |
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Kill the following processes cgateapp.exe | Unregister the following DLLs and reboot callgate.dll.
| Remove the following files callgate.dll, callgate.lib, callgate.sys, cgateapp.c, cgateapp.exe, cgateapp.mak, cgateapp.mdp, cgateapp.ncb, readme.txt, ring0.asm.
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