Malware

CISA released thirty-two Industrial Control Systems (ICS) advisories on August 14, 2025. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-25-226-01 Siemens SIMATIC RTLS Locating Manager ICSA-25-226-02 Siemens COMOS ICSA-25-226-03 Siemens Engineering Platforms ICSA-25-226-04 Siemens Simcenter Femap ICSA-25-226-05 Siemens Wibu CodeMeter Runtime ICSA-25-226-06 Siemens Opcenter Quality ICSA-25-226-07 Siemens Third-Party Components in SINEC OS ICSA-25-226-08 Siemens RUGGEDCOM CROSSBOW Station Access Controller ICSA-25-226-09 Siemens RUGGEDCOM APE1808 ICSA-25-226-10 Siemens SIPROTEC 5 ICSA-25-226-11 Siemens SIMATIC S7-PLCSIM ICSA-25-226-12 Siemens SIPROTEC 4 and SIPROTEC 4 Compact ICSA-25-226-13 Siemens…

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CISA, along with the National Security Agency, the Federal Bureau of Investigation, Environmental Protection Agency, and several international partners, released comprehensive guidance to help operational technology (OT) owners and operators across all critical infrastructure sectors create and maintain OT asset inventories and supplemental taxonomies.  An asset inventory is a regularly updated, structured list of an organization’s systems, hardware, and software. It includes a categorization system—a taxonomy—that classifies assets based on their importance and function. This…

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Today, CISA issued Emergency Directive (ED) 25-02: Mitigate Microsoft Exchange Vulnerability in response to CVE-2025-53786, a vulnerability in Microsoft Exchange server hybrid deployments.   ED 25-02 directs all Federal Civilian Executive Branch (FCEB) agencies with Microsoft Exchange hybrid environments to implement required mitigations by 9:00 AM EDT on Monday, August 11, 2025.  This vulnerability presents significant risk to all organizations operating Microsoft Exchange hybrid-joined configurations that have not yet implemented the April 2025 patch guidance.…

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Note: This Alert may be updated to reflect new guidance issued by CISA or other parties.  CISA is aware of the newly disclosed high-severity vulnerability, CVE-2025-53786, that allows a cyber threat actor with administrative access to an on-premise Microsoft Exchange server to escalate privileges by exploiting vulnerable hybrid-joined configurations. This vulnerability, if not addressed, could impact the identity integrity of an organization’s Exchange Online service.  While Microsoft has stated there is no observed exploitation as of…

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CISA published a Malware Analysis Report (MAR) with analysis and associated detection signatures on files related to Microsoft SharePoint vulnerabilities: CVE-2025-49704 [CWE-94: Code Injection], CVE-2025-49706 [CWE-287: Improper Authentication], CVE-2025-53770 [CWE-502: Deserialization of Untrusted Data], and CVE-2025-53771 [CWE-287: Improper Authentication] Cyber threat actors have chained CVE-2025-49704 and CVE-2025-49706 (in an exploit chain publicly known as “ToolShell”) to gain unauthorized access to on-premises SharePoint servers. CISA analyzed six files including two Dynamic Link-Library (.DLL), one cryptographic key…

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Today, CISA, in partnership with Sandia National Laboratories, announced the public availability of Thorium, a scalable and distributed platform for automated file analysis and result aggregation. Thorium enhances cybersecurity teams’ capabilities by automating analysis workflows through seamless integration of commercial, open-source, and custom tools. It supports various mission functions, including software analysis, digital forensics, and incident response, allowing analysts to efficiently assess complex malware threats. Thorium enables teams that frequently analyze files to achieve scalable…

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CISA, in partnership with the U.S. Coast Guard (USCG), released a joint Cybersecurity Advisory aimed at helping critical infrastructure organizations improve their cyber hygiene. This follows a proactive threat hunt engagement conducted at a U.S. critical infrastructure facility. During this engagement, CISA and USCG did not find evidence of malicious cyber activity or actor presence on the organization’s network but did identify several cybersecurity risks. CISA and USCG are sharing their findings and associated mitigations…

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Today, CISA released the Eviction Strategies Tool to provide cyber defenders with critical support and assistance during the containment and eviction phases of incident response. This tool includes: Cyber Eviction Strategies Playbook Next Generation (Playbook-NG): A web-based application for next-generation operations. COUN7ER: A database of atomic post-compromise countermeasures users can execute based on adversary tactics, techniques, and procedures. Together, Playbook-NG and COUN7ER create a systematic, tailored eviction plan that leverages distinct countermeasures to effectively contain…

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CISA released Microsegmentation in Zero Trust, Part One: Introduction and Planning as part of its ongoing efforts to support Federal Civilian Executive Branch (FCEB) agencies implementing zero trust architectures (ZTAs).  This guidance provides a high-level overview of microsegmentation, focusing on its key concepts, associated challenges and potential benefits, and includes recommended actions to modernize network security and advance zero trust principles. Microsegmentation is a critical component of ZTA that reduces the attack surface, limits lateral…

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CISA, along with the Federal Bureau of Investigation, Canadian Centre for Cyber Security, Royal Canadian Mounted Police, the Australian Cyber Security Centre’s Australian Signals Directorate, and the Australian Federal Police and National Cyber Security Centre, released an updated joint Cybersecurity Advisory on Scattered Spider—a cybercriminal group targeting commercial facilities sectors and subsectors. This advisory provides updated tactics, techniques, and procedures (TTPs) obtained through FBI investigations conducted through June 2025. Scattered Spider threat actors have been…

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