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CISA Issues Guidance on Evicting Adversaries from Networks Following SolarWinds Attacks

HIPAA Journal

Steve Alder

The Cybersecurity and Infrastructure Security Agency (CISA) has published guidance on evicting threat actors from networks compromised in the SolarWinds Orion supply chain attacks and, including subsequent compromises of Active Directory and M365 environments.

The attacks have been attributed to threat actors tied to the Russian Foreign Intelligence Service (SVR). After gaining network access through the update mechanism of SolarWinds Orion, the threat actor selected targets of interest for further compromise and bypassed multi-factor authentication methods and moved laterally into Microsoft 365 environments by compromising federated identity solutions. Most of the targets selected for further compromise were government departments and agencies and critical infrastructure organizations, although private sector organizations may also have experienced more extensive compromises.

The guidance applies to...

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