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THE THREAT eSentire is aware of widespread exploitation attempts targeting the recently disclosed ownCloud vulnerability CVE-2023-49103. CVE-2023-49103 (CVSS: 10) is tracked as a disclosure of… READ NOW
Our Threat Response Unit (TRU) publishes security advisories, blogs, reports, industry publications and webinars based on its original research and the insights driven through proactive threat hunts.
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company's mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Waterloo, ON and GITEX GLOBAL 2023, Dubai, UAE – October 18, 2023 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), today announced that Inspira Enterprise Inc, (Inspira), a… READ NOW
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On May 27th, 2022, security researchers identified a malicious Word document abusing a previously unidentified zero-day vulnerability in Microsoft products. The zero-day vulnerability is being tentatively tracked under the name “Follina”. Exploitation of Follina would allow remote and unauthenticated threat actors to achieve Remote Code Execution, with minimal user interaction, by sending a malicious document to potential victims.
eSentire is aware of public Proof-of-Concept (PoC) exploit code for Follina; widespread exploitation of the vulnerability is expected in the immediate future. At the time of publishing, security patches to address the vulnerability are not available. Alternative mitigations should be applied to prevent exploitation.
On May 27, 2022, researchers at Nao_Sec identified a malicious Office document submitted to VirusTotal on May 25th, 2022. The document exploits a previously unknown vulnerability to execute code retrieved from a remote source. This is accomplished through the following steps:
This technique is expected to be adapted by threat actors in the near term to deliver and execute malware. Potential attack vectors include Office documents, templates, and emails. Protected View is considered a barrier but can be bypassed by users, or by attackers using an RTF file. Researchers noted RTF files can be used to trigger the vulnerability from the preview pane in Windows Explorer.
Until an official fix is released by Microsoft, the only identified workaround at this time is to remove the ms-msdt handler via the registry. We recommended testing this workaround for issues prior to deployment. Additionally, Microsoft’s Attack Surface Reduction rule to block child processes from spawning has been shown to be effective (see above recommendation).