The officer of the lure worked for Direction Générale de la Sécurité Intérieure (DGSI, translated to General Directorate for Internal Security), a French intelligence agency charged with counter-espionage, counter-terrorism, countering cybercrime and surveillance of potentially threatening groups, organisations, and social phenomena.
French authorities did not release the officer's name but said he operated using the pseudonym Haurus on a dark web market known as Black Hand.
The officer stands accused of selling confidential information such as sensitive documents that made their way into the hands of cyber-criminals. Investigators believe the criminals to whom Haurus sold the secret files used them to create forged documents.
French authorities also say the officer advertised a service to track the location of mobile devices based on a supplied phone number. He advertised the system as a way to track spouses or members of competing criminal gangs. Investigators believe Haurus was using the French police resources designed with the intention to track criminals for this service.
He advertised a service that told buyers if they were tracked by French police and what information officers had on them.
Officials said they tracked down the real-life identity of Haurus after they seized and shut down the Black Hand portal on June 12, earlier this year. They were also able to track down some of the documents put up for sale on the market based on an individual-specific code that's added to official documents and tracks their history.
Haurus faces up to seven years in prison and a fine of up to a fine of €100,000 / $115,000.
All sorts of goods are available for sale on the dark web, such as hotel guest data, health records, government spyware, US military drone data, and backdoors into PCs and servers. This case stands out because it's usually hackers and cyber-criminals who sell this data and not police officers.