The Azadi Tower in Tehran, Iran. (Christiaan Triebert, CC BY 2.0, via Wikimedia Commons)

In late 2020, a well-known hacker group believed to be sponsored by the Iranian government started a credential harvesting campaign targeting United States and Israeli medical personnel, according to new research from Proofpoint.

Researchers attribute the campaign, which it has dubbed "BadBlood," to Charming Kitten, also known as Phosphorous or, in Proofpoint's parlance, TA453.

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