Tag: business email compromise

23 Jul 2020
Securing Microsoft O365

Securing Microsoft 365: Using Multifactor Authentication to Combat Business Email Compromise

Securing Microsoft 365

In today’s security landscape, business email compromise (BEC) is one of the most prolific online crimes, and these attacks are often aimed at financial institutions. In a BEC scam, cybercriminals send email messages to bank staff that looks like a legitimate request in an attempt to gain access to non-public information. To mitigate this threat, community banks and credit unions should take advantage of the security settings offered in Microsoft 365.

Microsoft has multiple service offerings to secure against all kinds of attack vectors. However, the easiest security setting financial institutions often overlook is multifactor authentication (MFA), which requires more than one method of authentication to verify a user’s identity for a login or other transaction. The methods typically include something you know (pin); something you have (phone) and/or something you are (biometrics).

Microsoft’s analysis has determined that 99.9% of account compromises can be blocked with MFA, but the overall adoption rate is only 46%. Why is this the case? Financial institutions run into two key pain points that prevent them from implementing MFA:

1. Time

Many IT administrators are tasked with having to set up their users on MFA, and simply don’t have the resources to do this all on their own. Let’s face it, this can be a time-consuming task to complete in addition to the other daily IT activities IT admins have on their plate. One option is to identify who your early adopters will be and let them become technology champions. This can be branch managers or team leads across your locations that can offer assistance to less experienced users. Another option is to work with a third-party provider that can handle the implementation process, enabling IT staff to work on more pressing tasks for the institution.

2. Bring Your Own Device (BYOD)

Most organizations have a BYOD policy in place, but it is normally in regard to accessing company resources, like email, teams or SharePoint where it is clear that the user is attempting to access company data for business-related activity. However, employee-owned devices can make MFA trickier to navigate since IT administrators may find themselves in a position where they are asking users to complete the MFA process on a personal device in order to access these company resources. Regardless, when MFA is added to the BYOD policy, it can effectively make BYOD safer.

MFA Options to Fit Your Institution’s Needs
There are many MFA options and some of them do not require the use of a personal device to verify a user’s identity. Many employees do not like the idea of having to install a mobile app on their phone, but they have no issues with an occasional text message or phone call. When implementing MFA for your institution, the best thing you can do for your users is to go over all of the available options and highlight the option your institution prefers them to use. For instance, when setting up MFA for our customers, we recommend the Microsoft Authenticator App.

Here are a few options to consider:

  • Microsoft Authenticator App – A user will use a one-time passcode or simply approve logins using the free Microsoft Authenticator app.
  • Call to Phone – This option is for landline phones. If your employees have a direct line, this is a good option to try. If the user does not have a direct line, keep in mind you would have to work out a procedural system for whoever is answering the phone to give the MFA information to the intended target.
  • Text message to phone – Sends a text message to the user’s mobile phone number containing a one-time code whenever you sign in from a new device.
  • Notification through desktop – Allows users to have MFA one-time passcode generation on their work desktop which helps to avoid use of personal devices.
  • Verification code from hardware token –User uses a one-time passcode generated from a hardware token. Microsoft provides the technology to implement this method, but you have to buy the hardware tokens and manage them. This is the only MFA method that comes with direct costs.

Not all MFA options are the same in terms of strength of security. However, your overall security posture is still enhanced by enabling MFA with any of these options. MFA is a low-cost option that protects your financial institution from cyber-attacks and other malicious activity. If you’re interested in implementing MFA for your financial institution, please reach out to Safe Systems to find an option that fits best with your institution’s unique needs.

01 May 2020
Combating Business Email Compromise and Protecting Your Remote Workforce

Combating Business Email Compromise and Protecting Your Remote Workforce

Combating Business Email Compromise and Protecting Your Remote Workforce

Over the last two months, there have been more people working remotely than ever before, and with more being done outside the branch, financial institutions cannot rely on their usual firewall and anti-malware solutions to protect their staff. Today, the single most common attack used to target remote users is what is known as “business email compromise” (BEC).

Safe Systems hosted a live webinar earlier this month discussing how BEC works; the main techniques used in these types of attacks; and the cost-effective solutions needed to mitigate them. In case you missed it, here are a few key points from the webinar:

What is business email compromise and how does it work?

Business email compromise is a security exploit where an attacker targets an employee who has access to company funds or other non-public information and convinces the victim to transfer money into a bank account controlled by the attacker.

These attacks have two main categories:

  1. Phishing emails – this is just a spoofed email that seemingly comes from someone you trust within the organization (like the CFO or CEO) instructing an employee to wire money to a specific account.
  2. Account takeover – the attacker procures your real username and password and then logs into your mailbox where they are then able to send and receive emails at will from your actual account.

Using these attack methods, cybercriminals can commit many different types of fraud, including wire fraud, non-public information (NPI) theft, and spreading of malware.

There are also a number of different attack “types” that cybercriminals commonly use to take over accounts:

A single-stage attack is a social engineering email directing a user to complete a certain action. For example, an email may include a link that leads to a rogue website where the attacker is trying to capture login information. This is a fairly simple, one-step attack.

The more sophisticated variation on this type of attack is the multi-stage method. In this attack, we often see that instead of having a link in the email that goes to a suspicious website that could potentially be blocked by other security layers, attackers use a link in the email that goes to a highly trusted place like a Citrix share file or some other trusted site. If the user clicks the link, they’ve now stepped outside of any email security layers the institution might have in place. Most often these sites are SSL encrypted so this underscores the importance of having SSL inspection performed on your traffic to ensure links in emails do lead to legitimate, secure websites. The problem with this, however, is that it can be an increasingly difficult job for some financial institutions to implement and manage.

How Can Financial Institutions Defend Against These Threats?

Prevent

The first line of defense against business email compromise is to stop the user from being exposed in the first place, and the single most effective measure financial institutions can implement is user training. It’s important for financial institutions to regularly conduct penetration testing and use security awareness training to educate their employees. Over the years, we’ve seen a distinct correlation between the frequency of user security awareness training and the success rate of phishing attacks. Some institutions leverage self-testing tools such as KnowBe4, but there are many other services that financial institutions can use to test their employees.

Mitigate

The second line of defense is to stop the user from causing damage. To mitigate the threat, financial institutions can use a variety of effective tools, including:

  • Email Filtering – a tool that filters out suspicious emails to ensure no spam, malicious content, or sensitive data makes it out of the institution unauthorized.
  • DNS Filtering – is the process of using the Domain Name System lookup to find the IP address of a website to block malicious websites and filter out harmful or inappropriate content.
  • URL Rewrite – if an email has a link, the system rewrites the destination of the link to go to a security company first before the real session is connected.
  • Multifactor Authentication – this tool requires more than one method of authentication to verify a user’s identity for a login or other transaction. The methods include something you know (pin); something you have (phone) and/or something you are (biometrics).

These are just a few of the tools that can help strengthen your institution’s security posture and ensure users do not fall victim to malicious attacks. However, if they do, it is critical to have a plan to respond.

Respond

The last line of defense is to stop the expansion of damages if a threat has occurred. In this case, financial institutions must conduct an investigation into the cyberattack and have thorough logs of their mail system to understand exactly what occurred; how far it has spread; and determine the next steps. Community banks and credit unions should have an incident response plan in place and perform regular tabletop testing to confirm the plan works and will be useful when a real attack occurs.

To learn more ways to protect your institution from business email compromise, watch our recorded webinar, “Business Email Compromise – Preventing the Biggest Risk from Remote Users.”