Cyber Security Alerts & Threat Intelligence

CISA has added ten new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2013-3163 Microsoft Internet Explorer Memory Corruption Vulnerability CVE-2014-1776 Microsoft Internet Explorer Memory Corruption Vulnerability CVE-2017-7494 Samba Remote Code Execution Vulnerability CVE-2022-42948 Fortra Cobalt Strike User Interface Remote Code Execution Vulnerability CVE-2022-39197 Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability CVE-2021-30900 Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability CVE-2022-38181 Arm Mali GPU Kernel Driver Use-After-Free Vulnerability CVE-2023-0266 Linux Kernel Use-After-Free Vulnerability CVE-2022-3038 Google Chrome Use-After-Free Vulnerability CVE-2022-22706 Arm Mali GPU Kernel Driver Unspecified Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal…

The Samba Team has released security updates addressing vulnerabilities in multiple versions of Samba. An attacker could exploit these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the following announcements and apply the necessary updates: CVE-2023-0225 CVE-2023-0922 CVE-2023-0614  

CISA is aware of open-source reports describing a supply chain attack against 3CX software and their customers. According to the reports, 3CXDesktopApp — a voice and video conferencing app — was trojanized, potentially leading to multi-staged attacks against users employing the vulnerable app. CISA urges users and organizations to review the following reports for more information, and hunt for the listed indicators of compromise (IOCs) for potential malicious activity: CrowdStrike: Falcon Platform Detects and Prevents Active Intrusion Campaign Targeting 3CXDesktopApp Customers SentinelOne: SmoothOperator | Ongoing Campaign Trojanizes 3CXDesktopApp in Supply Chain Attack

Today, CISA released the Untitled Goose Tool to help network defenders detect potentially malicious activity in Microsoft Azure, Azure Active Directory (AAD), and Microsoft 365 (M365) environments. The Untitled Goose Tool offers novel authentication and data gathering methods for network defenders to use as they interrogate and analyze their Microsoft cloud services. The tool enables users to: Export and review AAD sign-in and audit logs, M365 unified audit log (UAL), Azure activity logs, Microsoft Defender for IoT (internet of things) alerts, and Microsoft Defender for Endpoint (MDE) data for suspicious activity. Query, export, and investigate AAD, M365, and Azure configurations.…

In today’s blog post, Associate Director of the Joint Cyber Defense Collaborative (JCDC) Clayton Romans highlighted recent successes of pre-ransomware notification and its impact in reducing harm from ransomware intrusions. With pre-ransomware notifications, organizations can receive early warning and potentially evict threat actors before they can encrypt and hold critical data and systems for ransom. Using this proactive cyber defense capability, CISA has notified more than 60 entities of early-stage ransomware intrusions since January 2023, including critical infrastructure organizations in the Energy, Healthcare and Public Health, Water and Wastewater Systems sectors, as well as the education community. The pre-encryption ransomware notification…

As part of the Enduring Security Framework (ESF), the Cybersecurity and Infrastructure Security Agency (CISA) and the National Security Agency (NSA) has released Identity and Access Management Recommended Best Practices Guide for Administrators. These recommended best practices provide system administrators with actionable recommendations to better secure their systems from threats to Identity and Access Management (IAM). IAM—a framework of business processes, policies, and technologies that facilitate the management of digital identities—ensures that users only gain access to data when they have the appropriate credentials. This paper provides recommended best practices and mitigations to counter threats to IAM related to: identity…

Content: Today, we published stakeholder-based updates to the Cybersecurity Performance Goals (CPGs). Originally released last October, the CPGs are voluntary practices that businesses and critical infrastructure owners can take to protect themselves against cyber threats. The CPGs have been reorganized, reordered and renumbered to align closely with NIST CSF functions (Identify, Protect, Detect, Respond, and Recover) to help organizations more easily use the CPGs to prioritize investments as part of a broader cybersecurity program built around the CSF.  CISA urges stakeholders to review and learn more by visiting Cross-Sector Cybersecurity Performance Goals.  

Drupal has released a security advisory to address an access bypass vulnerability affecting multiple Drupal versions. An attacker could exploit this vulnerability to take control of an affected system. CISA encourages users and administrators to review Drupal security advisory SA-CONTRIB- 2023-004 for more information and apply the necessary updates.

The Federal Bureau of Investigation (FBI), CISA, and the Multi-State Information Sharing and Analysis Center (MS-ISAC) has released a joint cybersecurity advisory (CSA), #StopRansomware: LockBit 3.0. This joint advisory details known indicators of compromise (IOCs) and tactics, techniques, and procedures (TTPs) that FBI investigations correlated with LockBit 3.0 ransomware as recently as March 2023. LockBit 3.0 functions as an affiliate-based ransomware variant and is a continuation of LockBit 2.0 and LockBit. CISA encourages network defenders to review and apply the recommendations in the Mitigations section of this CSA. See StopRansomware.gov for additional guidance on ransomware protection, detection, and response.

SUMMARY Note: this joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail ransomware variants and ransomware threat actors. These #StopRansomware advisories include recently and historically observed tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to help organizations protect against ransomware. Visit stopransomware.gov to see all #StopRansomware advisories and to learn more about other ransomware threats and no-cost resources. Actions to take today to mitigate cyber threats from ransomware: Prioritize remediating known exploited vulnerabilities. Train users to recognize and report phishing attempts. Enable and enforce phishing- resistant multifactor authentication.…

In light of recent bank failures, CISA warns consumers to beware of potential scams requesting your money or sensitive personal information. Exercise caution in handling emails with bank-related subject lines, attachments, or links. In addition, be wary of social media pleas, texts, or door-to-door solicitations relating to any failed bank. The Federal Deposit Insurance Corporation (FDIC), the “Receiver” of failed banks, would never contact you asking for personal details, such as bank account information, credit and debit card numbers, social security numbers, or passwords. To avoid becoming victims of scams, consumers should review the following resources and take preventative measures:…

The Water Information Sharing and Analysis Center (WaterISAC) has released an advisory, Potential for Mandatory Microsoft DCOM Patch to Disrupt SCADA. ICS/OT/SCADA engineers and operators should assess the use of the Distributed Component Object Model (DCOM) protocol in their industrial environments. According to WaterISAC, “failure to address could result in loss of critical communications between impacted ICS/OT/SCADA devices.” CISA urges operators to review the WaterISAC advisory and apply recommended compensating controls. See Microsoft KB5004442—Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414) for more information.