See how to enable scripts. Choose the download you want. Download Summary:. Total Size: 0. Back Next. Microsoft recommends you install a download manager. Microsoft Download Manager. Manage all your internet downloads with this easy-to-use manager.
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In this case, you will have to download the files individually. In our previous practices, we downloaded a file, now we will download the payload using the same technique. This is done with the help of an action that we scripted. First, it will start the cmd. After the download completes, it executes the payload and we have ourselves a meterpreter session.
In the previous practical, we created a payload file and then gained a session from it. This method creates a file that can be detected. In other words, it was traceable. We will start this practice with our attacker machine, we will be running Metasploit Framework.
Here we choose the target 3 Regsvr32 as it will generate a small command that can be executed to get the meterpreter session. It works for a bit and gives us the regsvr32 command that will give us access to the target machine. On the Target Machine, there is a holdup.
BITSAdmin is programmed to run the command only on completion of the download. So, we will be needing to download something. It can be anything that seems harmful. Here we will be using a harmless png image file. As shown in the screenshot given below, we grab a meterpreter session from the Target Machine as soon as the command gets executed. This was a stealthy method as there is no file associated with the session we obtained. But this can get stealthier using the right techniques.
In the previous article of this series, we introduced Alternative Data Stream. We will create a malicious executable payload using msfvenom as we did in Practical 5, as it is the same method, we are not showing it again here.
After creating the payload and starting the listener, we will move to our target machine. Now to execute the file that we put in the ADS; we will be using wmic. We will use the create switch followed by the path of the payload as shown in the image. We went back to our Attacker Machine to see that a meterpreter instance is generated and captured by our listener. We run sysinfo to see the details of the Target System.
Persistence, it means that the exploited session will be available to you even after the target machine restarts. It is used to set the minimum length of time, in seconds, that BITS wait after facing a transient error before trying to transfer the file.
Here, if payload that we download gets stuck in a transient error, which is a temporary error. BITS is designed to run continuously if an error of such kind occurs. So, if our download is completed but due to the transient error was not able to execute properly, this switch will make it retry after seconds.
Now we need to work on it to be a persistence method. But the BITS can get into an error state and keep the payload in a temporary state without completing the download and in turn stopping the execution of the payload. To solve this issue, we will use schtasks to resume our job at a specific time again and again. This will allow the payload to persist irrespective of any kind of issue. The BITSAdmin redownloads the payload in case of an error and schtasks take care of the execution of the payload on an event of a reboot of the machine.
In case of failure, we will have to restart the listener with the same configuration and we will have the session again in no time. A job's display name doesn't have to be unique.
By default, you can access information about your own jobs. To access information for another user's jobs, you must have administrator privileges. If the job was created in an elevated state, then you must run bitsadmin from an elevated window; otherwise, you'll have read-only access to the job. Many of the switches correspond to methods in the BITS interfaces. For additional details that may be relevant to using a switch, see the corresponding method.
Use the following switches to create a job, set and retrieve the properties of a job, and monitor the status of a job.
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