Business Email Compromise in Microsoft 365
Take swift action to contain and recover from email attacks.
Email drives modern business communication, but the rising threat of business email compromise (BEC) by cybercriminals jeopardizes data security and integrity.
In today's digital age, collaborative environments have become the lifeblood of business communication, and Microsoft 365 (M365) is at the forefront of this transformation. However, this digital transformation comes with a growing threat - BEC. Cybercriminals and threat actors are constantly looking for ways to compromise sensitive information, commit fraud, and steal valuable data.
TrustedSec’s BEC offering provides a low-cost way for companies to quickly determine what actions attackers took within their M365 environment after they were compromised. Analysis will include examining M365 user activities for:
- Attacker Sign-Ins
- Evidence of files accessed or downloaded
- Emails sent by attackers
- Unauthorized MFA devices
- Malicious mailbox rules
Additionally, TrustedSec searches the M365 tenant for other users that may have been compromised so the organization can be assured if their compromise has been contained.
BECs require swift action by organizations to contain and recover from an attack. TrustedSec’s BEC analysis lets every organization quickly respond to the attack, determine what actions were taken by attackers, and be confident that the compromise is resolved.
“TrustedSec allows me to help make an impact on our clients and help those in need.”Tyler HudakPractice Lead, Incident Response
Tyler Hudak
Practice Lead, Incident ResponseTyler has over 20 years of real-world experience in incident handling, malware analysis, computer forensics, and information security for multiple organizations. He has spoken and taught at a number of security conferences about topics ranging from incident response to penetration testing techniques.
Learn more about our services from an expert.
Let our experts tailor solutions to your security challenges.
Read our blog
Explore the latest cybersecurity topics on the TrustedSec Security Blog
Observations From Business Email Compromise (BEC) Attacks
Since joining TrustedSec, I have gotten to work numerous cases, and each of them is like unraveling a mystery to get at the truth—especially the situations…
Securing Sensitive Data: How Ransomware Challenges the Healthcare Industry
The healthcare industry is a prime target for ransomware attacks due to the critical nature of its services and the sensitive data it handles. This blog post…
MailItemsAccessed Woes: M365 Investigation Challenges
Email compromises within Microsoft 365 are too common these days. The TrustedSec Incident Response team receives a lot of calls to investigate M365 email…
The Rising Threat: A Surge in Zero-Day Exploits
IntroductionThe cat-and-mouse game between defenders and attackers continues to escalate in the ever-evolving cybersecurity landscape. Advanced Persistent…
Unmasking Business Email Compromise: Safeguarding Organizations in the Digital Age
Business Email Compromises (BEC) within the Microsoft 365 environment are a large threat with nearly $500 Million reported in stolen funds in 2022[1].…
Prefetch: The Little Snitch That Tells on You
Incident Response and forensic analysts use the contents of prefetch files in investigations to gather information, such as the source from which an executable…
Critical Vulnerability in Progress MOVEit Transfer: Technical Analysis and Recommendations
On May 31, 2023, Progress Software released a security bulletin concerning a critical vulnerability within MOVEit Transfer, a widely used secure file transfer…
Incident Response Rapid Triage: A DFIR Warrior's Guide (Part 3 – Network Analysis and Tooling)
Within the first two installments of this series, we identified the key to successful incident preparation starts with making sure a solid incident triage…
Incident Response Rapid Triage: A DFIR Warrior's Guide (Part 2 – Incident Assessment and Windows Artifact Processing)
In Part 1 of this series, we identified that there are three (3) key parts to successful incident preparation: ensuring that a solid incident triage process is…
Incident Response Rapid Triage: A DFIR Warrior's Guide (Part 1 – Process Overview and Preparation)
In this series, I will be discussing how to handle an incident with the speed and precision of a DFIR warrior. With a rapid triage mindset, you'll be able to…