![]() ![]() Installing programs on various machines at once.īatch scripts are stored in simple text files containing lines with commands that get executed in sequence, one after the other. Setting up servers for different purposes.Īutomating housekeeping activities such as deleting unwanted files or log files.Īutomating the deployment of applications from one environment to another. Some of the common uses of Batch Script are − Supports advanced features such as Functions and Arrays.Ĭan include other programming codes such as Perl. Has control structures such as for, if, while, switch for better automating and scripting. Some of the features of Batch Script are −Ĭan read inputs from users so that it can be processed further. In most organizations, Batch Script is incorporated in some way or the other to automate stuff. Scripting is a way by which one can alleviate this necessity by automating these command sequences in order to make one’s life at the shell easier and more productive. RI interval Specifies the repetition interval in minutes.Batch Script is incorporated to automate command sequences which are repetitive in nature. The timeįormat is HH:mm (24 hour time) for example, 14:30 forĢ:30 PM. ST starttime Specifies the start time to run the task. TR taskrun Specifies the path and file name of the program to be ![]() TN taskname Specifies a name which uniquely I idletime Specifies the amount of idle time to wait before M months Specifies month(s) of the year. MONTHLY schedules 1 - 31 (days of the month). Values: MON, TUE, WED, THU, FRI, SAT, SUN and for D days Specifies the day of the week to run the task. MO modifier Refines the schedule type to allow finer control over MONTHLY, ONCE, ONSTART, ONLOGON, ONIDLE, ONEVENT. Valid schedule types: MINUTE, HOURLY, DAILY, WEEKLY, SC schedule Specifies the schedule frequency. ![]() To prompt for the password, the value must be either RP Specifies the password for the "run as" user. "NT AUTHORITY\NETWORKSERVICE" are also available as well Valid values are "", "NT AUTHORITY\SYSTEM"įor v2 tasks, "NT AUTHORITY\LOCALSERVICE" and ![]() RU username Specifies the "run as" user account (user context) P Specifies the password for the given user context. U username Specifies the user context under which SchTasks.exe The system parameter defaults to the local system. S system Specifies the remote system to connect to. Įnables an administrator to create scheduled tasks on a local or HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon C:\Windows\system32> reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" Typically Winlogon runs Userinit.exe, which in turn runs logon scripts, reestablishes network connections, and then starts explorer.īelow we can see the "default" content for the Winlogon registry key. Links:Īs per the Micorsoft TechNet description the Userinit registry key defines which programs are run by Winlogon when a user logs in to the system. HKLM keys are run (if required) every time the system is booted while HKCU keys are only executed when a specific user logs on to the system. Before we get started I just want to explain the difference between "HKEY_LOCAL_MACHINE" (HKLM) and "HKEY_CURRENT_USER" (HKCU). Using the registry we can execute batch files, executables and even exported functions in DLL's. Tampering with the Windows registry is probably the most common and transparent way to set up persistent access to a windows machine. It should be noted that advanced persistence mechanisms go far beyond that, kernel rootkits (such as custom NDIS protocol drivers) or even going out-of-band (System Management Mode, Rogue Hypervisors). That is not to say it is not an interesting subject, both from a defensive and offensive perspective.Īs the title indicates, we will only be covering userland. Usually this doesn't enter into play during a pentest (with the exception of red team engagements) as there is no benefit to adding it to the scope of the project. This tutorial will cover several techniques that can be used to gain persistent access to Windows machines. ![]()
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