Malware

Today, the Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) released a joint Cybersecurity Advisory (CSA) on Scattered Spider—a cybercriminal group targeting commercial facilities sectors and subsectors. The advisory provides tactics, techniques, and procedures (TTPs) obtained through FBI investigations as recently as November 2023. Scattered Spider threat actors typically engage in data theft for extortion using multiple social engineering techniques and have recently leveraged BlackCat/ALPHV ransomware alongside their usual TTPs.…

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CISA has opened a 30-day Federal Register notice to receive public comment on the draft Secure Software Development Attestation Form. CISA developed this form in coordination with the Office of Management and Budget. With the Secure Software Development Attestation Form, federal departments and agencies will be able to obtain attestation of product security from a software producer before using the software on government systems. This form will establish a standardized process for the federal government…

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Citrix has released security updates addressing vulnerabilities in Citrix Hypervisor 8.2 CU1 LTSR. A cyber threat actor could exploit these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Citrix Hypervisor Security Bulletin for CVE-2023-23583 and CVE-2023-46835 and apply the necessary updates.                                        

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Today, the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) released a joint Cybersecurity Advisory (CSA), #StopRansomware: Rhysida Ransomware, to disseminate known Rhysida ransomware indicators of compromise (IOCs), detection methods, and tactics, techniques, and procedures (TTPs) identified through investigations as recently as September 2023. Observed as a ransomware-as-a-service (RaaS) model, Rhysida actors have compromised organizations in education, manufacturing, information technology, and government…

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Fortinet has released security advisories addressing vulnerabilities in FortiClient and FortiGate. Cyber threat actors may exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the following Fortinet security advisories and apply the recommended updates: FG-IR-22-299: FortiClient (Windows) – Arbitrary file deletion from unprivileged users FG-IR-23-274: FortiClient (Windows) – DLL Hijacking via openssl.cnf FG-IR-23-385: curl and libcurl CVE-2023-38545 and CVE-2023-38546 vulnerabilities

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VMware has released a security advisory addressing a vulnerability in VMWare Cloud Director Appliance. Cyber threat actors may exploit this vulnerability to take control of an affected system. CISA encourages users and administrators to review the following VMware security advisory and apply the recommended updates: VMSA-2023-0026: VMware Cloud Director Appliance contains an authentication bypass vulnerability (CVE-2023-34060)

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Microsoft has released updates addressing multiple vulnerabilities in Microsoft software. A cyber threat actor can exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Microsoft’s November 2023 Security Update Guide and apply the necessary updates.

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Today, the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) and CISA released Business Continuity in a Box. Business Continuity in a Box, developed by ACSC with contributions from CISA, assists organizations with swiftly and securely standing up critical business functions during or following a cyber incident. Comprised of two core components—Continuity of Communications and Continuity of Applications—Business Continuity in a Box is designed for situations where the availability or integrity of an organization’s…

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Today, the Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) released an update to joint Cybersecurity Advisory (CSA) #StopRansomware: Royal Ransomware. The updated advisory provides network defenders with additional information on tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) associated with Royal ransomware variants. FBI investigations identified these TTPs and IOCs as recently as June 2023. Royal ransomware attacks have spread across numerous critical infrastructure sectors including, but not…

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