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Microsoft Exchange, Outlook Under Siege By APTs

New, sophisticated adversaries are switching up their tactics in exploiting enterprise-friendly platforms — most notably Microsoft Exchange, Outlook Web Access (OWA) and Outlook on the Web – in order to steal business credentials and other sensitive data.

Both Microsoft’s Exchange mail server and calendaring server and its Outlook personal information manager web app provide authentication services – and integration with other platforms – that researchers say are prime for attackers to leverage for launching attacks.

Accenture’s 2020 Cyber Threatscape report, released Monday, shed light on how actors are leveraging Exchange and OWA – and evolving their tactics to develop new malware families that target these services, or using new detection evasion techniques.

“Web-facing, data-intense systems and services that typically communicate externally can make it easier for adversaries to hide their traffic in the background noise, while authentication services could open up a credential-harvesting opportunity for cybercriminals,” according to Accenture researchers on Monday.

APTs Flock Exchange, OWA

One threat group that has been targeting Exchange and OWA is what researchers dub “BELUGASTURGEON” (aka Turla or Whitebear). Researchers say that this group operates from Russia, has been active for more than 10 years and is associated with numerous cyberattacks aimed at government agencies, foreign-policy research firms and think tanks across the globe.

The group is targeting these Microsoft services and using them as beachheads to hide traffic, relay commands, compromise e-mail, exfiltrate data and gather credentials for future espionage attacks, said researchers. For instance, they are manipulating legitimate traffic that’s traversing Exchange in order to relay commands or exfiltrate sensitive data.

“Hosts supporting Exchange and associated services frequently relay large volumes of data to external locations— representing a prime opportunity for malicious actors to hide their traffic within this background noise,” said researchers.

Another group, which researchers call SOURFACE (aka APT39 or Chafer), appears to have developed similar techniques to conceal malicious traffic, manipulating local firewalls and proxying traffic over non-standard ports using native commands, tools and functions, researchers said. Researchers said this group has been active since at least 2014 and is known for its cyberattacks on the oil and gas, communications, transportation and other industries in the Australia, Europe, Israel, Saudi Arabia, the U.S. and other regions.

In addition, threat groups are also creating new malware designed to specifically target Exchange and OWA. Researchers said they discovered several malicious files in the wild in 2019 that they assessed “with moderate confidence” were associated to a group called BLACKSTURGEON, used in targeting government and public sector orgs.

That includes a file that seemed like a version of the group’s customized version of the “RULER” tool, which is designed to abuse Microsoft Exchange services. This file exploits the CVE- 2017-11774 Outlook vulnerability, a security-feature bypass vulnerability that affects Microsoft Outlook and enables attackers to execute arbitrary commands, researchers said.

Other Services Under Attack

Cybercriminals are also targeting services that support Exchange and OWA. For instance, client-access servers (CAS), which handle all client connections to Exchange Server 2010 and Exchange 2013, typically operate in web-login portals for services including OWA. Attackers with access to CAS may be able to deploy capabilities to steal user login credentials, researchers said.

“Notably, an advanced persistent threat actor reportedly deployed web shells to harvest credentials from OWA users as they logged in,” they said.

The Windows Internet Information Services (IIS) platform, which supports OWA, is another increasing target. IIS is a web server software created by Microsoft for use with the Windows family. Researchers said they have observed SOURFACE, for instance, deploying custom Active Server Page Extended (ASPX) Web shells to IIS directories within the victim’s OWA environment. These web shells would include discrete file names, to resemble legitimate files on the victim’s system (for instance “login2.aspx” instead of “login.aspx”). And, to evade static detection, they typically contained limited functionality, often only file upload and download or command execution.

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Gloria magee

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Cannot start Microsoft Office Outlook

On this site, you’ll see working methods to repair the “can’t start Microsoft Outlook” issue. Additionally, these methods can enable you to get up your Outlook and running again without any mistakes.

Now, let us see how it is possible to fix and prevent a much worse situation when you can’t start Outlook. But first, we’re beginning from the reason and symptoms of the mistake.

Recover your Outlook with Outlook PST Recovery.

Which are the causes and symptom of the “Don’t start Microsoft Outlook” mistake?

The most important symptom of the matter is quite clear and readily identifiable. After you click on Outlook you’ll discover a dialogue box appears and can be hanging for a little while, then you receive the “can’t start Microsoft view. cannot open the outlook window. The set of connections can’t be opened” error.

Can’t start Microsoft Outlook

In case the file has corrupted then you are going to discover that its dimensions become kb.

Additionally, there’s absolutely no specific cause for this mistake, but all versions of MS Outlook from 2003 into Outlook 2019 might be impacted. Anyhow, whatever the motive is, the result is the same – you can’t start Outlook. . And the answers for this query are given below.

Workarounds to Solve “Don’t start Microsoft Outlook” problem

Now you understand the reasons why causes “can’t start Microsoft outlook. Cannot open the view window. The collection of folders cannot be opened” problem. Therefore, let us see how to have them repaired. Below there are 2 workarounds that fix this situation.

1. Recover the Navigation Pane configuration file

Typically it’s the corrupt Navigation Pane settings file that limits Microsoft Outlook from the beginning, so the first thing you have to do would be to regain it. Here is how you can do this task:

Click on the Start button.

Following that, Compose the"outlook.exe /resetnavpane" control and click on OK.

If you discover any difficulty and unable to recoup the Navigation pane settings document, then attempt to manually delete the XML file which stores the navigation pane configurations. To do this, go using the next measures:

It’ll open the folder in which MS Outlook Setup files are saved.

Cannot start Microsoft Outlook

2. Repair your Outlook data files with the help of Scanpst.exe.

Then default Outlook data file PST may be damaged or deleted, that’s the reason you can’t start Outlook. The document Outlook.pst isn’t a personal folders file"

To do so, do the Actions listed below:

Below you’ll discover Scanpst.exe from the listing. Double click it.

Additionally, you can go via Start and kind scanpst.exe from the Search box.

Following that, you’ll discover a window click the Browse button to choose your default Outlook.pst file.

After a couple of minutes, your document is going to be fixed.

Hopefully, your document got fixed. If not Then You Need to attempt the alternative provided below:

The majority of the time it fixes the documents. However, if the corruption is intense then this instrument fails. In these situations, you want to utilize PST File Retrieval designed by Mailconvertertools. A novice user can utilize this tool and fix their own Outlook PST files. It’s the very best way to recuperate and fix Outlook PST files and it simplifies all the constraints of the Inbox Repair Tool.

Conclusion

This technical manual is all about how to resolve “can’t start Microsoft outlook. Cannot open the view window. The collection of folders cannot be opened” I am hoping that your issue has been solved. When there’s any difficulty regarding any measure then don’t hesitate to contact.

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TopDevelopers Co

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