CISA – Alerts

Original release date: February 9, 2023 Summary Note: This Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail various ransomware variants and various ransomware threat actors. These #StopRansomware advisories detail historically and recently observed tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to help

Original release date: February 8, 2023 Summary The Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) are releasing this joint Cybersecurity Advisory (CSA) in response to the ongoing ransomware campaign, known as “ESXiArgs.” Malicious actors may be exploiting known vulnerabilities in VMware ESXi servers that are likely running unpatched and

Original release date: January 25, 2023 Summary The Cybersecurity and Infrastructure Security Agency (CISA), National Security Agency (NSA), and Multi-State Information Sharing and Analysis Center (MS-ISAC) (hereafter referred to as the “authoring organizations”) are releasing this joint Cybersecurity Advisory (CSA) to warn network defenders about malicious use of legitimate remote monitoring and management (RMM) software.

Original release date: December 1, 2022 Summary 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. Note: This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories

Original release date: November 17, 2022 Summary Actions to Take Today to Mitigate Cyber Threats from Ransomware: • Prioritize remediating known exploited vulnerabilities. • Enable and enforce multifactor authentication with strong passwords • Close unused ports and remove any application not deemed necessary for day-to-day operations. Note: This joint Cybersecurity Advisory (CSA) is part of

Original release date: November 16, 2022 Summary From mid-June through mid-July 2022, CISA conducted an incident response engagement at a Federal Civilian Executive Branch (FCEB) organization where CISA observed suspected advanced persistent threat (APT) activity. In the course of incident response activities, CISA determined that cyber threat actors exploited the Log4Shell vulnerability in an unpatched