The FBI, with the help of local international law enforcement, has been targeting users of the remote administration tool (RAT) dubbed BlackShades.
No arrests have been made, but police raids in Europe have been reported on forums by BlackShades users, according to a blog post by cyber crime investigator Rickey Gevers. According to posts on hackforum.net, police have been seizing any computers linked to the RAT.
The BlackShades website, where the software was sold, went offline Wednesday. According to whois.com information, the domain was seized by the FBI.
This recent crackdown may be tied to comments made by an FBI official at the Reuters Cybersecurity summit, when he indicated that the agency expects to announce "searches, indictments and multiple arrests over the next several weeks," according to a report by Reuters.