Backdoor.Coreflood is a trojan horse that opens a back door on the compromised computer. It acts as a keylogger and gathers user information.2 http://www.youtube.com
As of 2011, the FBI has the capability, and recently authorization from the courts, to delete Coreflood from infected computers after receiving written consent. The FBI has reduced the size of the botnet by 90% in the United States and 75% around the world.3
"Coordinated Law Enforcement Action Leads to Massive Reduction in Size of International Botnet « USDOJ: Justice Blog". Archived from the original on 2011-10-15. Retrieved 2011-10-11. https://web.archive.org/web/20111015161852/http://blogs.usdoj.gov/blog/archives/1320 ↩
"Backdoor.Coreflood". Symantec. November 29, 2002. Archived from the original on January 7, 2007. Retrieved May 3, 2011. https://web.archive.org/web/20070107135808/http://www.symantec.com/security_response/writeup.jsp?docid=2002-112912-2439-99 ↩
"US authorities to delete Coreflood bot from computers". April 29, 2011. Retrieved May 2, 2011. http://www.h-online.com/security/news/item/US-authorities-to-delete-Coreflood-bot-from-computers-1235033.html ↩