![]() ![]() This being the case, you can detect not only PSExec, but also any process being run by PSExec or any other processes that are being run in Session 0-either through misconfiguration or malign intent. Either it will use the passed-through credentials of the user who launched PSExec or the username and password provided on the command line. In practice, this means that regular users should never start a process that runs in Session 0.īecause PSExec installs itself as a service, any process that you run using PSExec will run in Session 0. ![]() In Windows Vista, Windows Server 2008 and later versions of Windows, the operating system isolates Services in Session 0 and runs applications in other sessions, so Services are protected from attacks that originate in application code. In Windows XP, Windows Server 2003 and earlier versions of Windows, all services ran in “Session 0” along with applications. It’s actually quite easy to detect when PSExec is used, because the tool installs itself as a service, creating a Windows Event (Event ID 7045 logged in the System Eventlog). This useful tool for Windows Administrators also serves as a convenient opportunity for attackers, and pen testers often use it as well. ![]() For example, you can run ipconfig on a remote host, redirecting the input back to your local host. The tool interactively installs itself on the remote target machine, so you can redirect the input and output of console applications. ![]() It lets you execute processes on other systems without having to install anything manually. PSExec is a powerful utility offered by Microsoft’s Sysinternals. ![]()
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