The US-CERT Current Activity web page is a regularly updated summary of the most frequent, high-impact types of security incidents currently being reported to the US-CERT.

CISA Releases CISA Insights and Creates Webpage on Ongoing APT Cyber Activity

CISA is tracking a known compromise involving SolarWinds Orion products that are currently being exploited by a malicious actor. An advanced persistent threat (APT) actor is responsible for compromising the SolarWinds Orion software supply chain, as well as widespread abuse of commonly used authentication mechanisms. If left unchecked, this threat actor has the resources, patience, and expertise to resist eviction from compromised networks and continue to hold affected organizations at risk.

CISA Updates Alert and Releases Supplemental Guidance on Emergency Directive for SolarWinds Orion Compromise

CISA has updated AA20-352A: Advanced Persistent Threat Compromise of Government Agencies, Critical Infrastructure, and Private Sector Organizations, originally released December 17. This update states that CISA has evidence of, and is currently investigating, initial access vectors in addition to those attributed to the SolarWinds Orion supply chain compromise. This update also provides new mitigation guidance and revises the indicators of compromise table; it also includes a downloadable STIX file of the IOCs.

NSA Releases Cybersecurity Advisory on Detecting Abuse of Authentication Mechanisms

The National Security Agency (NSA) has released a cybersecurity advisory on detecting abuse of authentication mechanisms. This advisory describes tactics, techniques, and procedures used by malicious cyber actors to access protected data in the cloud and provides guidance on defending against and detecting such activity.

Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird

Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system.  

Apple Releases Security Updates for Multiple Products

Apple has released security updates to address vulnerabilities in multiple products. An attacker could exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review the Apple security pages for the following products and apply the necessary updates:

Active Exploitation of SolarWinds Software

The Cybersecurity and Infrastructure Security Agency (CISA) is aware of active exploitation of SolarWinds Orion Platform software versions 2019.4 HF 5 through 2020.2.1 HF 1, released between March 2020 and June 2020.

CISA encourages affected organizations to read the SolarWinds and FireEye advisories for more information and FireEye’s GitHub page for detection countermeasures: