CISA Alerts

AA20-227A: Phishing Emails Used to Deploy KONNI Malware

Original release date: August 14, 2020 Summary This Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise framework for all referenced threat actor techniques. The Cybersecurity and Infrastructure Security Agency (CISA) has observed cyber actors using emails containing a Microsoft Word document with a malicious Visual Basic …

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AA20-225A: Malicious Cyber Actor Spoofing COVID-19 Loan Relief Webpage via Phishing Emails

Original release date: August 12, 2020 Summary The Cybersecurity and Infrastructure Security Agency (CISA) is currently tracking an unknown malicious cyber actor who is spoofing the Small Business Administration (SBA) COVID-19 loan relief webpage via phishing emails. These emails include a malicious link to the spoofed SBA website that the cyber actor is using for …

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AA20-209A: Potential Legacy Risk from Malware Targeting QNAP NAS Devices

Original release date: July 27, 2020 Summary This is a joint alert from the United States Cybersecurity and Infrastructure Security Agency (CISA) and the United Kingdom’s National Cyber Security Centre (NCSC). CISA and NCSC are investigating a strain of malware known as QSnatch, which attackers used in late 2019 to target Network Attached Storage (NAS) …

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AA20-206A: Threat Actor Exploitation of F5 BIG-IP CVE-2020-5902

Original release date: July 24, 2020 Summary The Cybersecurity and Infrastructure Security Agency (CISA) is issuing this alert in response to recently disclosed exploits that target F5 BIG-IP devices that are vulnerable to CVE-2020-5902. F5 Networks, Inc. (F5) released a patch for CVE-2020-5902 on June 30, 2020.[1] Unpatched F5 BIG-IP devices are an attractive target …

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AA20-205A: NSA and CISA Recommend Immediate Actions to Reduce Exposure Across Operational Technologies and Control Systems

Original release date: July 23, 2020 Summary Note: This Activity Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework. See the ATT&CK for Enterprise and ATT&CK for Industrial Control Systems frameworks for all referenced threat actor techniques and mitigations. Over recent months, cyber actors have demonstrated their continued willingness to conduct malicious cyber activity …

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AA20-198A: Malicious Cyber Actor Use of Network Tunneling and Spoofing to Obfuscate Geolocation

Original release date: July 16, 2020 Summary This Activity Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK™) and Pre-ATT&CK frameworks. See the MITRE ATT&CK for Enterprise and Pre-ATT&CK frameworks for referenced threat actor techniques. Attributing malicious cyber activity that uses network tunneling and spoofing techniques to a specific threat actor is difficult. …

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AA20-195A: Critical Vulnerability in SAP NetWeaver AS Java

Original release date: July 13, 2020 Summary On July 13, 2020 EST, SAP released a security update to address a critical vulnerability, CVE-2020-6287, affecting the SAP NetWeaver Application Server (AS) Java component LM Configuration Wizard. An unauthenticated attacker can exploit this vulnerability through the Hypertext Transfer Protocol (HTTP) to take control of trusted SAP applications. …

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AA20-183A: Defending Against Malicious Cyber Activity Originating from Tor

Original release date: July 1, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) and Pre-ATT&CK framework. See the ATT&CK for Enterprise and Pre-ATT&CK frameworks for referenced threat actor techniques. This advisory—written by the Cybersecurity Security and Infrastructure Security Agency (CISA) with contributions from the Federal Bureau of Investigation (FBI)—highlights …

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AA20-183A: Defending Against Malicious Cyber Activity Originating from Tor

Original release date: July 1, 2020 | Last revised: July 2, 2020 Summary This advisory uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) and Pre-ATT&CK framework. See the ATT&CK for Enterprise and Pre-ATT&CK frameworks for referenced threat actor techniques. This advisory—written by the Cybersecurity Security and Infrastructure Security Agency (CISA) with contributions from …

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AA20-182A: EINSTEIN Data Trends – 30-day Lookback

Original release date: June 30, 2020 Summary Cybersecurity and Infrastructure Security Agency (CISA) analysts have compiled the top detection signatures that have been the most active over the month of May in our national Intrusion Detection System (IDS), known as EINSTEIN. This information is meant to give the reader a closer look into what analysts …

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