The report from the Microsoft Threat Analysis Center (MTAC) indicates that an Iranian group called Mint Sandstorm that is connected to the Islamic Revolutionary Guard Corps sent a spear phishing email in June to a high-ranking official on a presidential campaign from the compromised email account belonging to a former senior campaign adviser.

"Mint Sandstorm similarly targeted a presidential campaign in May and June 2020 five to six months ahead of the last U.S. presidential election," MTAC said, adding that the same group also tried but failed to breach an account belonging to a former presidential candidate.

No details were released on the official's identity, but Microsoft's threat assessment team said that the Iranian-linked breaches related to increasing attempts to influence the U.S. presidential election in November.

"This recent cyber-enabled influence activity arises from a combination of actors which are conducting initial cyber reconnaissance and seeding online personas and websites into the information space," according to the report.

Following the release of the report, the Trump 2024 presidential campaign confirmed that it had been the target of a cyberattack in which campaign documents were stolen.

The breach, which Trump campaign spokesperson Steven Cheung told Politico on Aug. 10 has been attributed to "foreign sources hostile to the United States," marks a significant development in the area of foreign interference in U.S. elections as the race for the White House heats up.

Politico reported that, on July 22, it began receiving emails from an anonymous source using the alias "Robert." The emails reportedly contained internal documents from the Trump campaign, including a 271-page research dossier on Sen. JD Vance (R-Ohio), who was vetted as a potential vice presidential nominee and later chosen as former President Donald Trump's running mate.