Kroll has identified two different file exfiltration methodologies leveraged by threat actors, primarily CLOP, during recent engagements involving the exploitation of the MOVEit vulnerability (CVE-2023-34362) throughout May and June 2023. In the vast majority of Kroll’s global MOVEit investigations, the primary data exfiltration method consisted of utilizing the dropped web shell to inject a session or create a malicious account (named Method 1 for this piece).
Recently, a team of experts from JumpSEC Labs discovered a vulnerability in Microsoft Teams that allows malicious actors to bypass policy controls and introduce malware through external communication channels. Leaving end-users susceptible to phishing attacks. Microsoft’s advice is to educate end-users to detect phishing attempts. One workaround would be to disable Microsoft Teams collaboration with external organizations.
GuidePoint Security is a software company that specializes in security services. The organization is located in Herndon, Virginia, employs 722 people, and protects and manages data for thousands of people during its daily operations. This company was compromised in the MOVEit data breaches, putting a large number of people at risk.