After the French satirical magazine Charlie Hebdo's launched a cartoon contest to mock Iran's ruling cleric, a state-backed Iranian cyber unit struck back with a hack-and-leak campaign that was designed to provoke fear with the claimed pilfering of a big subscriber database, Microsoft security researchers say. 

The FBI blames the same Iranian cyber operators, Emennet Pasargad, for an influence operation that sought to interfere in the 2020 U.S. presidential election, the tech giant said in a blog published Friday. Iran has in recent years stepped up false-flag cyber operations as a tool for discrediting foes.

Calling itself “Holy Souls” and posing as hacktivists, the group claimed in early January to have obtained personal information on 200,000 subscribers and Charlie Hebdo merchandise buyers, according to Microsoft's Digital Threat Analysis Center.

As proof of the data theft, “Holy Souls” released a 200-record sample with names, phone numbers and home and email addresses of Charlie Hebdo subscribers that “could put the magazine's subscribers at risk for online or physical targeting” by extremists. The group then advertised the supposed complete data cache on several dark web sites for $340,000.

Microsoft said it did not know whether anyone purchased the cache.