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Notes From the Field: Brute Force password attack causes massive Active Directory lockout at hospital

Early in the morning, a sudden spike in calls to the helpdesk for password resets and releases swamped IT-support staff at a hospital network. User accounts were under attack and Active Directory lockouts were spreading fast. Together we installed Messageware Exchange Protocol Guard (EPG) to look in detail at Outlook Web and immediately two things [...]

Notes From the Field: Government agency stolen passwords bypass 2FA Security

The UK's National Cyber Security Centre (NCSC) is warning that criminals are looking to exploit the trend toward home office (Coronavirus) to conduct cyberattacks and hacking campaigns. These ‘phishing’ attempts have been seen in several countries and can lead to significant losses: financial, reputational, and sensitive data. And no one is immune —as you'll read [...]

Bots Automatically Target Credit Union’s Exchange Servers With Password Spray Attacks

Exchange Server Hacks: Notes From The Field Cybersecurity is a top concern for everyone in the banking and financial sectors, and credit unions are no exception. The speed at which bots discover and target internet-facing Exchange Servers underscores the need for a variety of security solutions to minimize attack surfaces. In our fifth and final [...]

Telco Adds Exchange Server Protocol Guard to Prevent AD Lockouts Caused by 2FA Login Software

Exchange Server: Notes From the Field This case involves attacks at a division of a large Telco with a strong IT team operating more than sixty on-premises servers and mandated 2FA security solution for divisions managing their own Exchange Servers. And then … several incidents lead one Division’s security team to discover that password guessing [...]

Disgruntled ex-employee attacks Exchange Server with Outlook Mobile from their BYOD device

Exchange Server: Notes from the Field Support staff in a large manufacturing company were experiencing a sudden increase in the number of calls dealing with Active Directory user account lockouts and email password resets. The Exchange Server messaging group reached out to us for help. Together we installed Exchange Protocol Guard (EPG) to find out [...]

Protecting Outlook Web from Denial of Service and Brute Force Attacks

Last week we highlighted the exposures that exist with attachments in Outlook Web. This week we look at protecting Outlook Web from Denial of Service and Brute Force Attacks. Depending upon how you have configured Outlook Web Access (OWA) and Active Directory, you will be opening your network up to either brute force attacks or denial of [...]

2021-04-16T12:20:16-04:00OWA Security|

7 Ways to Secure Sensitive Corporate Data Crossing the Border

Recently, The New York Times ran an article warning travelers to exercise the same degree of security over data on mobile devices as they would in protecting themselves from muggers. The warning comes in the wake of increased pressure by foreign and domestic governments for travelers to hand over devices and passwords because border agents [...]

Wait! Don’t STOP your Exchange Outlook Web Deployment!

Most IT organizations have to deal with remote workers, employees who travel or telecommute, temporary contractors and agents or staff who are simply being productive at home. For all these people, email remains the bedrock of corporate communication. Without it they simply wouldn’t get their jobs done. So for organizations that use Microsoft Exchange Server, [...]

2019-08-24T01:11:23-04:00Blog, Outlook Web, OWA Security|

Are Your Microsoft Outlook Web Attachments Secure?

Last week we demonstrated a variety of ways in which an OWA session can be compromised, even though the user may have been doing their best to follow company security policies. This week's series of tests will highlight the exposures that exist with attachments in Outlook Web. Simply follow the steps described in the following usage cases to expose [...]

Is Your Microsoft Outlook Web Secure?

Nowadays employees are mobile and constantly connected; the traditional work environment has expanded beyond the physical office walls to include coffee shops, airports, and home. Unfortunately, all this increased mobility and flexibility has exposed new security risks for businesses and IT, risks that sophisticated hackers are quick to exploit.  […]