CISA Alerts

Original release date: March 18, 2021 Summary This Alert announces the CISA Hunt and Incident Response Program (CHIRP) tool. CHIRP is a forensics collection tool that CISA developed to help network defenders find indicators of compromise (IOCs) associated with activity detailed in the following CISA Alerts: AA20-352A: Advanced Persistent Threat Compromise of Government Agencies, Critical …

AA21-077A: Detecting Post-Compromise Threat Activity Using the CHIRP IOC Detection Tool Read More »

Original release date: March 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. The Cybersecurity and Infrastructure Security Agency (CISA) and Federal Bureau of Investigation (FBI) have observed continued targeting through spearphishing campaigns using TrickBot …

AA21-076A: TrickBot Malware Read More »

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 arbitrary code on vulnerable Exchange Servers, enabling the attacker to gain persistent system access, as well as access to files …

AA21-062A: Mitigate Microsoft Exchange Server Vulnerabilities Read More »

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 …

AA21-055A: Exploitation of Accellion File Transfer Appliance Read More »

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 …

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

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, …

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

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 …

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

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 …

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

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 …

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

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 …

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