Microsoft’s on‑premises SharePoint ecosystem is again at the center of a high‑urgency security incident: an unauthenticated or low‑privilege remote code execution (RCE) chain built from an authentication/spoofing bypass and an unsafe deserialization path has been weaponized in the wild, enabling...
CISA’s release of a Malware Analysis Report (MAR) detailing a Malicious Listener discovered on compromised Ivanti Endpoint Manager Mobile (EPMM) systems should reset priorities for every IT team that runs on-premises mobile device management (MDM). The analysis dissects two sets of malware...
A compact but sophisticated campaign tracked as GhostRedirector has infected at least 65 Internet‑facing Windows IIS servers and paired a stealthy native backdoor with an in‑process IIS module to run a covert, profitable SEO fraud operation that pushes third‑party gambling sites while leaving...
A new wave of critical vulnerabilities in Microsoft SharePoint has come to light with the release of a comprehensive Malware Analysis Report (MAR) by the US Cybersecurity and Infrastructure Security Agency (CISA). The report shines a spotlight on dangerous exploitation chains—most notably one...
Original release date: December 2, 2021
Summary
This joint Cybersecurity Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework, Version 9. See the ATT&CK for Enterprise framework for referenced threat actor techniques and for mitigations.
This joint...
Original release date: September 16, 2021
Summary
This Joint Cybersecurity Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework, Version 8. See the ATT&CK for Enterprise for referenced threat actor tactics and for techniques.
This joint advisory is...
Original release date: April 20, 2021
Summary
The Cybersecurity and Infrastructure Security Agency (CISA) is aware of compromises affecting U.S. government agencies, critical infrastructure entities, and other private sector organizations by a cyber threat actor—or actors—beginning in June 2020...
Original release date: March 3, 2021
Summary
Cybersecurity and Infrastructure Security (CISA) partners have observed active exploitation of vulnerabilities in Microsoft Exchange Server products. Successful exploitation of these vulnerabilities allows an unauthenticated attacker to execute...
Original release date: September 15, 2020
Summary
This Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise framework for all referenced threat actor techniques.
This product was written by the Cybersecurity and...
Original release date: November 10, 2015
Systems Affected
Web servers that allow web shells
Overview
This alert describes the frequent use of web shells as an exploitation vector. Web shells can be used to obtain unauthorized access and can lead to wider network compromise. This alert...