Windows

How to run the WSUS Server Cleanup Wizard from command-line

When running the WSUS Server Cleanup Wizard from the MMC snap-in, it can occur that you receive the following WSUS database error:

Error: Database Error
An error occurred when trying to perform a database operation. This can happen if the database is very busy, if the database service is stopped, if the connection to the database is lost, of if the Post-Installation task is not completed successfully. Please contact your system administrator if the problem persists.

Click Reset Server Node to try to connect to the server again.

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Scanning for CVE-2017-0143 (EternalBlue) using nmap (MS17-010)

With both WannaCry and NotPetya using MS17-010 for propagation it is important to be able to detect servers which are vulnerable.
This vulnerability has been assigned CVE-ID CVE-2017-0143. The vulnerability is also often nicknamed EternalBlue.
This page explains how you can scan for it from a Windows machine using nmap.

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Scanning for CVE-2017-5638 using nmap

On March 6, 2017, Apache disclosed a vulnerability in the Jakarta multipart parser used in Apache Struts2 that could allow an attacker to execute commands remotely on the targeted system using a crafted Content-Type header value.
This vulnerability has been assigned CVE-ID CVE-2017-5638.
This page explains how you can scan for it from a Windows machine using nmap.

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How to allow a normal user to start, stop, and pauze/continue a Windows service

By default, starting and stopping Windows services are tasks that can only be performed by administrators. There are cases where you want regular users to be able to start or stop services. This can be easily accomplished using the subinacl.exe command-line tool.

This is the subinacl.exe syntax of how you can allow a normal user to start, stop, and pauze/continue a service.

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How to list hidden shares remotely

When sharing Windows folders on the network, it is possible to hide the shared folder from the list of shares. This can be done by adding a $-sign to the end of a share name.
It is important to mention that this does not really hide such shares from the network. If you ask a Windows machines for a list of its shares, then it reports all shares, including those with a $-sign. It are then the clients who filter out all shares that end in a dollar-sign.

So how can you get a list of all the hidden shares on a server?

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ICACLS command line options


ICACLS name /save aclfile [/T] [/C] [/L] [/Q]
    stores the DACLs for the files and folders that match the name
    into aclfile for later use with /restore. Note that SACLs,
    owner, or integrity labels are not saved.

ICACLS directory [/substitute SidOld SidNew [...]] /restore aclfile
                 [/C] [/L] [/Q]
    applies the stored DACLs to files in directory.

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Importing vbscript code at runtime

Many script languages have an import function that allows to import and execute code that is stored in another file. Microsoft's vbscript however is lacking such functionality. This page shows how it can be accomplished to import and execute vbscript code that is stored in another file.

Assume that you have the following file with some functions that you have defined:

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Scan for FREAK using nmap

Not everyone is vulnerable to the potential attack vector that researchers from INRIA, a French research institute, and Microsoft disclosed recently. In order to be vulnerable, the computer or server must support a class of deliberately weak export cipher suites. Support for these weak algorithms has remained in many implementations, however they are typically disabled by default. Nevertheless, the researchers discovered that several implementations incorrectly allow the message sequence of export ciphersuites to be used even if a non-export ciphersuite was nogotiated.

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