CISA Alerts

AA21-055A: Exploitation of Accellion File Transfer Appliance

Original release date: February 24, 2021 Summary This joint advisory is the result of a collaborative effort by the cybersecurity authorities of Australia,[1] New Zealand,[2] Singapore,[3] the United Kingdom,[4] and the United States.[5][6] These authorities are aware of cyber actors exploiting vulnerabilities in Accellion File Transfer Appliance (FTA).[7] This activity has impacted organizations globally, including …

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AA21-048A: AppleJeus: Analysis of North Korea’s Cryptocurrency Malware

Original release date: February 17, 2021 Summary This Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise for all referenced threat actor tactics and techniques. This joint advisory is the result of analytic efforts among the Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure Security Agency …

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AA21-042A: Compromise of U.S. Water Treatment Facility

Original release date: February 11, 2021 Summary On February 5, 2021, unidentified cyber actors obtained unauthorized access to the supervisory control and data acquisition (SCADA) system at a U.S. drinking water treatment plant. The unidentified actors used the SCADA system’s software to increase the amount of sodium hydroxide, also known as lye, a caustic chemical, …

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AA21-008A: Detecting Post-Compromise Threat Activity in Microsoft Cloud Environments

Original release date: January 8, 2021 Summary This Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise for all referenced threat actor tactics and techniques. This Alert is a companion alert to AA20-352A: Advanced Persistent Threat Compromise of Government Agencies, Critical Infrastructure, and Private Sector Organizations. AA20-352A …

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AA20-352A: Advanced Persistent Threat Compromise of Government Agencies, Critical Infrastructure, and Private Sector Organizations

Original release date: December 17, 2020<br/><h3>Summary</h3><p class=”tip-intro” style=”font-size: 15px;”><em>This Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&amp;CK®) version 8 framework. See the <a href=”https://attack.mitre.org/versions/v8/”>ATT&amp;CK for Enterprise version 8</a> for all referenced threat actor tactics and techniques.</em></p> <p>The Cybersecurity and Infrastructure Security Agency (CISA) is aware of compromises of U.S. government agencies, critical …

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AA20-345A: Cyber Actors Target K-12 Distance Learning Education to Cause Disruptions and Steal Data

Original release date: December 10, 2020<br/><h3>Summary</h3><p>This Joint Cybersecurity Advisory was coauthored by the Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure Security Agency (CISA), and the Multi-State Information Sharing and Analysis Center (MS-ISAC).</p> <p>The FBI, CISA, and MS-ISAC assess malicious cyber actors are targeting kindergarten through twelfth grade (K-12) educational institutions, leading to ransomware …

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AA20-336A: Advanced Persistent Threat Actors Targeting U.S. Think Tanks

Original release date: December 1, 2020<br/><h3>Summary</h3><p class=”tip-intro” style=”font-size: 15px;”><em>This Advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&amp;CK®) framework. See the <a href=”https://attack.mitre.org/versions/v7/techniques/enterprise/”>ATT&amp;CK for Enterprise</a> for all referenced threat actor tactics and techniques.</em></p> <p>The Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) have observed persistent continued cyber intrusions …

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AA20-304A: Iranian Advanced Persistent Threat Actor Identified Obtaining Voter Registration Data

Original release date: October 30, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) version 7 framework. See the ATT&CK for Enterprise version 7 for all referenced threat actor tactics and techniques. This joint cybersecurity advisory was coauthored by the Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau …

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AA20-302A: Ransomware Activity Targeting the Healthcare and Public Health Sector

Original release date: October 28, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) version 7 framework. See the ATT&CK for Enterprise version 7 for all referenced threat actor tactics and techniques. This joint cybersecurity advisory was coauthored by the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of …

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AA20-301A: North Korean Advanced Persistent Threat Focus: Kimsuky

Original release date: October 27, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) version 7 framework. See the ATT&CK for Enterprise version 7 for all referenced threat actor tactics and techniques. This joint cybersecurity advisory was coauthored by the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of …

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