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The Department of Homeland Security is actively investigating a cyberattack that recently compromised its Homeland Security Information Network (HSIN).  The network is an information sharing platform used by federal, state, local, and private-sector partners, specifically to share sensitive but unclassified data amongst the government and internationally.

According to an initial report, an unidentified threat actor orchestrated the intrusion between late May and early June.  Investigators indica

The Homeland Security Information Network (HSIN) is the Department of Homeland Security’s official system for trusted sharing of Sensitive But Unclassified (SBU) information between federal, state, local, tribal, territorial, international, and private sector partners.  HSIN users rely on the platform to access mission-critical data, send requests securely between agencies, manage operations, coordinate planned event safety and security, respond to incidents, and share the information they need