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Let’s say that, during the middle of a busy day, you receive what looks like a work-related email with a QR code. The email claims to come from a coworker, requesting your help in reviewing a d… Read more on Cisco Blogs
Imagine this: Your CEO sends you an email asking for your help transferring $5,000 to a new vendor for an urgent project. You make the transfer, only to find out later that the email was actually from an imposter, and that money is now in the hands of cybercriminals. Oops, right? crickets
Business Email Compromise (BEC) is a type of cybercrime that involves compromising or imitating legitimate business email accounts to carry out fraudulent transactions or steal sensitive information. The goal of a BEC attack is typically to trick the victim into transferring money, clicking on a malicious link, or disclosing sensitive information such as login credentials. BEC attacks can have a devastating impact on organizations of all sizes and in all industries, making it essential for businesses to be aware of the threat, understand the business risk, and take the necessary steps to protect themselves.
According to the latest FBI IC3 report, BEC is “one of the most financially damaging online crimes” and in 2021 was accountable for $2.4 Billion in adjusted losses for businesses and consumers.
One of the most common types of BEC attacks is called impersonating or email spoofing. By pretending to be a trusted colleague or business partner to gain the victim’s trust, the attacker uses social engineering techniques to trick the victim into clicking on a link or attachment in an email that contains malware, takes the victim to a malicious website, and has them transfer funds or change payment information.
BEC attacks can be very sophisticated and are difficult to detect. Many times, what the end-user sees on their email client does not represent the true email address of that sender, or it shows one that has been spoofed.
Typically, the attacker tries to impersonate someone in the organization with enough authority to not be questioned about what he/she is asking to be done.
As with everything in security, to be able to succeed in stopping BEC attacks, additional security layers & techniques should be implemented. There are several options to mitigate or reduce the number of successful BEC attacks. Creating a list of the people who will be likely to be impersonated will provide the best results. Usually, with names from the CxO level, this is known as a High Impact Personnel list. It will be used along with other security analysis engines to make sure any impersonated/spoof emails, along with other threats, get stopped and will not reach the end user.
The Cisco Secure Email Threat Defense solution leverages hundreds of detection engines that utilize state-of-the-art artificial intelligence/machine learning and natural language processing to convict messages from the most creative attackers! On top of this, our customers can define their High Impact Personnel list, and together with the other detection engines, will be able to not only block malicious messages but also understand the reasons and categories of why a message is being convicted as malicious.
In summary, Business Email Compromise (BEC) is a serious threat to organizations of all sizes and in all industries. To protect against BEC attacks, businesses should implement multiple techniques including identifying their High Impact Personnel for their organization, educating employees about the threat, and relying on reporting to understand who is being targeted most frequently so their security policies can be adjusted.
See how Secure Email Threat Defense identifies specific business risk factors to protect your organization.
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Attackers specifically craft business email compromise (BEC) and phishing emails using a combination of malicious techniques, expertly selected from an ever-evolving bag of tricks. They’ll use these techniques to impersonate a person or business that’s well-known to the targeted recipient and hide their true intentions, while attempting to avoid detection by security controls.
As a result of the requisite expertise needed to combat these complex attacks, email security has traditionally been siloed away in disparate teams and security controls. Practitioners are buried under an ever-growing pile of RFCs, requiring extensive domain-specific knowledge, unending vigilance, and meticulous manual interventions, such as tweaking trust levels and cultivating allow/block lists with IPs, domains, senders, and vendors.
Cisco Secure Email Threat Defense is leading the industry forward with a major shift, elevating email security into a new era; where administration will consist of merely associating specific business risks with the appropriate due diligence response required to remediate against them.
Email Threat Defense has introduced a new Threat Profile that provides the customer with deep insights into the specific business risks of individual email threats and the confidence to act quickly. This new visualization is powered by a new patent-pending threat detection engine. This engine leverages intelligence distilled from Talos global-scale threat research across a massive volume of email traffic into machine learning, behavioral modeling, and natural language understanding.
The detection engine granularly identifies specific underlying threat techniques utilized in the message by the attacker. The identified techniques provide the full context of the threat message as the supporting foundation for the engine to determine threat categorization and the specific risk to the business. These malicious Techniques, together with the threat category and specific business risk, are used to populate the Threat Profile.
Each message’s Threat Profile is identified in real-time, automatically remediated per policy, and surfaced directly to the operator in the message detail views, providing deep contextual insights into the attacker’s intent and the associated risks to the business. As part of a larger Extended Detection and Response (XDR) strategy, the actionable intelligence in Email Threat Defense is integrated with the wider enterprise orchestration of security controls via SecureX, easing the operational burden by decreasing your mean time to remediation (MTTR).
Email Threat Defense delivers a distinct understanding of malicious messages, the most vulnerable targets within the organization, and the most effective means of protecting them from phishing, scams, and BEC attacks. With a clean design and core focus on simplifying administration, Email Threat Defense deploys in minutes to strengthen protection of your existing Microsoft 365 Exchange Online platform against the most advanced email threats.
For more information, visit the Cisco Secure Email product pages, read the Email Threat Defense data sheet, and view the demo video below.
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I’m sure you’ve seen them — emails or messages that sound alarming and ask you to act quickly. We live in a digital world that produces hundreds of messages and alerts every day. It’s often hard to determine the validity of a suspicious message or phishing email. Whether you are an administrator, or an end-user, it can be overwhelming to accurately identify a malicious message. When in doubt, here are some questions you should ask yourself:
Is the message from a legitimate sender?
Do I normally receive messages from this person?
If there’s a link, can I tell where it’s sending me?
Attackers continue to evolve their methods, and they’re highly educated on the defenses they come up against in the wild. They’ll craft messages that do not involve any traditional indicators of compromise, such as domains, IP address, or URL links. They’ll also start their attacks by sending messages as an initial lure to establish trust, before sending an email with altered invoice or one claiming to be a helpless employee attempting to get their payroll fixed.
Phishing is a socially-based attack type, one where the threat actors focus on human behavior. When these attacks target organizations, there are multiple levels of attack at play. One that focuses on behavioral patterns and workflow, and the other centers on the victim’s emotional boundaries, such as targeting their desire to help others. You see this pattern frequently in Business Email Compromise (BEC) attacks.
Below, we’ve placed an example of a lure, which will test the victim to see if there is a means to quickly establish trust. Here, the threat actor is pretending to be the Chief Financial Officer (CFO) of the victim’s organization. If the lure is successful, then the threat actor will progress the attack, and often request sensitive records or wire transfers. Notice that in the email headers, the person pretending to be the CFO is using a Gmail account, one that was likely created just for this attack. The message is brief, stresses importance and urgency, and requests assistance, playing on the victim’s workflow and desire to help an executive or someone with authority.
The example below is a simplified one, to be sure, but the elements are legitimate. Daily, emails like this hit the inboxes of organizations globally, and the attackers only need to locate a single victim to make their efforts payout.
In the FBI / IC3 2021 Internet Crime Report, there were nearly 20,000 Business Email Compromise complaints filed, with an adjusted loss of nearly 2.4 billion dollars. While spoofing the identity of an executive is certainly one way to conduct a BEC attack, the FBI says that threat actors have started leveraging the normality of hybrid-work to target meeting platforms to establish trust and conduct their crimes. When successful, the funds from the fraudulent wire transfers are moved to crypto wallets and the funds dispersed, making recovery harder.
So as an end user what can you do to protect your organization? Be mindful anytime you receive an urgent call to action, especially when the subject involves money. If your workflow means that you regularly receive these types of requests from the specific individual, verify their identity and the validity of the request using another channel of communication, such as in person or via phone. If you do validate their identity via the phone, take care to avoid calling any numbers listed in the email.
Cisco Secure Email helps stop these types of attacks by tracking user relationships and threat techniques. These techniques often include account takeover, spoofing and many more. Using an intent-based approach allows Secure Email to detect and classify business email compromises and other attacks, so administrators are empowered to take a risk-based approach to stopping these threats.
Find out more about how Cisco Secure Email can help keep your organization safe from phishing.
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Trend Micro Research has developed a go-to resource for all things related to cybercriminal underground hosting and infrastructure. Today we released the second in this three-part series of reports which detail the what, how, and why of cybercriminal hosting (see the first part here).
As part of this report, we dive into the common life cycle of a compromised server from initial compromise to the different stages of monetization preferred by criminals. It’s also important to note that regardless of whether a company’s server is on-premise or cloud-based, criminals don’t care what kind of server they compromise.
To a criminal, any server that is exposed or vulnerable is fair game.
Cloud vs. On-Premise Servers
Cybercriminals don’t care where servers are located. They can leverage the storage space, computation resources, or steal data no matter what type of server they access. Whatever is most exposed will most likely be abused.
As digital transformation continues and potentially picks up to allow for continued remote working, cloud servers are more likely to be exposed. Many enterprise IT teams, unfortunately, are not arranged to provide the same protection for cloud as on-premise servers.
As a side note, we want to emphasize that this scenario applies only to cloud instances replicating the storage or processing power of an on-premise server. Containers or serverless functions won’t fall victim to this same type of compromise. Additionally, if the attacker compromises the cloud account, as opposed to a single running instance, then there is an entirely different attack life cycle as they can spin up computing resources at will. Although this is possible, however, it is not our focus here.
Attack Red Flags
Many IT and security teams might not look for earlier stages of abuse. Before getting hit by ransomware, however, there are other red flags that could alert teams to the breach.
If a server is compromised and used for cryptocurrency mining (also known as cryptomining), this can be one of the biggest red flags for a security team. The discovery of cryptomining malware running on any server should result in the company taking immediate action and initiating an incident response to lock down that server.
This indicator of compromise (IOC) is significant because while cryptomining malware is often seen as less serious compared to other malware types, it is also used as a monetization tactic that can run in the background while server access is being sold for further malicious activity. For example, access could be sold for use as a server for underground hosting. Meanwhile, the data could be exfiltrated and sold as personally identifiable information (PII) or for industrial espionage, or it could be sold for a targeted ransomware attack. It’s possible to think of the presence of cryptomining malware as the proverbial canary in a coal mine: This is the case, at least, for several access-as-a-service (AaaS) criminals who use this as part of their business model.
Attack Life Cycle
Attacks on compromised servers follow a common path:
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The monetization lifecycle of a compromised server
Often, targeted ransomware is the final stage. In most cases, asset categorization reveals data that is valuable to the business but not necessarily valuable for espionage.
A deep understanding of the servers and network allows criminals behind a targeted ransomware attack to hit the company where it hurts the most. These criminals would know the dataset, where they live, whether there are backups of the data, and more. With such a detailed blueprint of the organization in their hands, cybercriminals can lock down critical systems and demand higher ransom, as we saw in our 2020 midyear security roundup report.
In addition, while a ransomware attack would be the visible urgent issue for the defender to solve in such an incident, the same attack could also indicate that something far more serious has likely already taken place: the theft of company data, which should be factored into the company’s response planning. More importantly, it should be noted that once a company finds an IOC for cryptocurrency, stopping the attacker right then and there could save them considerable time and money in the future.
Ultimately, no matter where a company’s data is stored, hybrid cloud security is critical to preventing this life cycle.
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