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I don't know, but they have their own version of Baghdad Bob on that issue:

Russian Ambassador to South Korea Gleb Ivashentsov urged the United States on Tuesday to present evidence North Korea is counterfeiting U.S. currency, Yonhap News Agency reported.
"The side that raises the suspicions should present evidence," Ivashentsov was quoted by Yonhap as telling a group of senior South Korean journalists.
"So, the U.S. should find evidence to convict (North Korea of counterfeiting)," he said.
The Russian envoy said his country has not received any concrete evidence on North Korea's alleged counterfeiting.
"There is rumor-level talk on the issue," he reportedly said.
He also said foreign countries should not interfere with North Korea's internal affairs, and added North Korea would fire back if pushed forcefully, Yonhap said.
Russia urges U.S. to present evidence of N. Korean counterfeiting

Oh my gosh...another denial from that area (ref: Baghdad Bob):

"Counterfeit dollars? Well, if you are going to listen to Georgians, soon you will say that we have a nuclear bomb here," Mikhail Mindzayev, interior minister in the separatist government, said in a telephone interview. Mindzayev asserted that "we do not have any counterfeit dollars here, and we do not have any criminals."
Washington Post

Too funny.