In the weeks since Microsoft released details about a serious vulnerability affecting their Exchange mail server software, a range of threat actors have been targeting exploitable servers with a variety of malware, from webshells to ransomware. Neither of these are compressed files, either. The first file is written out to the filesystem as QuickCPU. The certutil application is designed to be able to decode baseencoded security certificates, so the attackers have leveraged that functionality by encoding an executable payload in base64 and wrapping it in headers that indicate it is some form of digital certificate. The batch script runs this command that outputs the decoded executable into the same directory. When decoded, the batch script runs the executable, which extracts the miner and configuration data from the QuickCPU. The file uses forged data in its Properties sheet that indicates the file is a Windows component, but the binary is not digitally signed and besides, no such file has ever existed as a standard component of Windows, though there is a legitimate utility with the same name , made by a third-party software developer. That utility is not connected to this malware in any way. The executable appears to contain a modified version of a tool publicly available on Github called PExInjector.
This article is the first part in a series on migrating to Exchange Server The customer, Not Real University, is currently running a mixed Exchange and environment. They were in the process of upgrading to Exchange but were delayed by some technical issues. With the release of Exchange , Not Real University has decided to stop the Exchange project and upgrade the entire environment to Exchange instead. That scenario provides the opportunity to demonstrate many of the technical requirements for migrating to Exchange from both Exchange and Exchange Running the script reveals the following information about Not Real University. The end goal of the project is to decommission the Exchange and servers, leaving only the Exchange server running. To get from the current state to the end state will require many small steps and changes along the way to take into account the different Exchange features that are in use, and to ensure a seamless migration for end users with no downtime. Thank you for bringing to our attention.
This tutorial describes how you can deploy Microsoft Exchange Server on Compute Engine and configure it for high availability and site resilience. The Exchange deployment will span two zones within a single region. In each zone, you will deploy a mailbox server and an edge transport server. The mailbox servers will be part of a database availability group so that mailbox data is replicated across zones. Use the Pricing Calculator to generate a cost estimate based on your projected usage.
To provide your Lync Server users with voice mail capabilities on hosted Exchange Unified Messaging UM , you must perform the following configuration tasks on the Edge Server:. For example, run:. AllowFederatedUsers specifies whether internal users are allowed to communicate with users from federated domains. This property also determines whether internal users can communicate with users in a split domain scenario. If False, Lync Server will only federate with domains found on the allowed domains list. This parameter is required if you use DNS service routing. In most deployments, the value is set to false to avoid opening up federation to all partners. Run the New-CsHostingProvider cmdlet to configure the hosting provider. Identity specifies a unique string value identifier for the hosting provider you are creating, in this example, Fabrikam.