![]() Start process using the new access token // Cannot use Process.Start as there is no way to set the access token to use var commandLine = "ChildApp. If (!PInvoke.SetTokenInformation(newAccessToken, TOKEN_INFORMATION_CLASS.TokenIntegrityLevel, &tml, length)) icacls /setintegritylevel (CI) (OI)Level explicitly adds an integrity. The separation also allows assigning an integrity level to a process that is slightly higher. If you have the appropriate permissions, it looks like you could use the command line tool icacls to set the integrity level. if (!PInvoke.ConvertStringSidToSid( "S-1-16-8192", out psid)) Windows security architecture, Security Reference Monitor. Set the token to medium integrity because SaferCreateLevel doesn't reduce the // integrity level of the token and keep it as high. Can you include the full command lines of the processes that you see Any good process explorer should be able to show them for you (WinDBG certainly does). If (!PInvoke.SaferComputeTokenFromLevel(saferHandle, null, out var newAccessToken, 0, null)) Will it help with BHO object loading even under protected mode. How to start process with low-integrity level. In almost all cases, this approach works great - if it decides that it needs to be elevated and has an integrity level < 0x3000 (High), then it relaunches with runas and everything is fine. As the IE is running in low integrity level the bho is not loaded with IE running under protected mode. You will notice that process Explorer will be unable to see any of the dlls or even identify the integrity level of the higher process. I have a socket client running as BHO object which tries to communicate with Desktop application. I was able to determine this by using Process Explorer. (You can look at integrity levels of processes using Process Explorer.) In the screenshot above, I used Notepad to simulate malware. You can see each process' integrity level using Process Explorer, described in Chapter 3. ![]() Throw new Win32Exception(Marshal.GetLastWin32Error()) Normally, applications are launched with a medium or low integrity level, however for some reason, this one was elevated. Since by default Windows launches processes under the Medium integrity level, user-mode malware running on the victim’s host will be prevented from accessing the file that was assigned the High integrity level. Processes are assigned and run at an integrity level (IL). Create a new new access token if (!PInvoke.SaferCreateLevel(PInvoke.SAFER_SCOPEID_USER, PInvoke.SAFER_LEVELID_NORMALUSER, PInvoke.SAFER_LEVEL_OPEN, out saferHandle, ( void*) null)) I tried to change its integrity to Low with the following statament : icacls 1. SAFER_LEVEL_HANDLE saferHandle = default 1 I have an exe file that run as Medium integrity by default.
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