The Iranian government-sponsored hackers targeted U.S. critical infrastructure sectors, an advisory found.
The hackers leveraged their access for additional operations, including data exfiltration, ransomware, and extortion.
The advisory, compiled by American, British, and Australian officials, outlined the malicious activity perpetrated by the attackers, which date back to at least March of this year, the agencies said in a statement released by the FBI and U.K. cybersecurity officials said the hackers are focused on exploiting known vulnerabilities rather than targeting specific sectors, which include transportation and health care sectors.