$10M Is Yours If You Can Get This Man to Depart Russia – Krebs on Safety


The U.S. authorities this week put a $10 million bounty on the pinnacle of a Russian man who for the previous 18 years operated Try2Check, one of many cybercrime underground’s most trusted companies for checking the validity of stolen bank card information. U.S. authorities say 43-year-old Denis Kulkov‘s card-checking service made him not less than $18 million, which he used to purchase a Ferrari, Land Rover, and different luxurious objects.

Denis Kulkov, a.okay.a. “Nordex,” in his Ferrari. Picture: USDOJ.

Launched in 2005, Try2Check quickly was processing greater than 1,000,000 card-checking transactions monthly — charging 20 cents per transaction. Cybercriminals turned to companies like this after buying stolen bank card information from an underground store, with a watch towards minimizing the variety of playing cards which might be inactive by the point they’re put to felony use.

Try2Check was so dependable that it will definitely turned the official card-checking service for a number of the underground’s most bustling crime bazaars, together with Vault Market, Unicc, and Joker’s Stash. Prospects of those carding retailers who selected to make use of the store’s built-in (however a-la-carte) card checking service from Try2Check might count on computerized refunds on any playing cards that have been discovered to be inactive or canceled on the time of buy.

Many established stolen card retailers will permit prospects to request refunds on useless playing cards based mostly on official stories from trusted third-party checking companies. However typically, the larger retailers have steered prospects towards utilizing their very own white-labeled model of the Try2Check service — primarily to assist decrease disputes over canceled playing cards.

On Wednesday, Might 3, Try2Check’s web sites have been changed with a website seizure discover from the U.S. Secret Service and U.S. Division of Justice, as prosecutors within the Jap District of New York unsealed an indictment and search warrant naming Denis Gennadievich Kulkov of Samara, Russia because the proprietor.

Try2Check’s login pages have been changed with a seizure discover from U.S. regulation enforcement.

On the identical time, the U.S. Division of State issued a $10 million reward for data resulting in the arrest or conviction of Kulkov. In November 2021, the State Division started providing as much as to $10 million for the identify or location of any key leaders of REvil, a significant Russian ransomware gang.

As famous within the Secret Service’s felony criticism (PDF), the Try2Check service was first marketed on the closely-guarded Russian cybercrime discussion board Mazafaka, by somebody utilizing the deal with “KreenJo.” That deal with used the identical ICQ prompt messenger account quantity (555724) as a Mazafaka denizen named “Nordex.”

In February 2005, Nordex posted to Mazafaka that he was available in the market for hacked financial institution accounts, and supplied 50 p.c of the take. He requested companions to contact him on the ICQ quantity 228427661 or on the electronic mail handle polkas@bk.ru. As the federal government famous in its search warrant, Nordex exchanged messages with discussion board customers on the time figuring out himself as a then-24-year-old “Denis” from Samara, RU.

In 2017, U.S. regulation enforcement seized the cryptocurrency alternate BTC-e, and the Secret Service stated these information present {that a} Denis Kulkov from Samara provided the username “Nordexin,” electronic mail handle nordexin@ya.ru, and an handle in Samara.

Investigators had already discovered Instagram accounts the place Kulkov posted photos of his Ferrari and his household. Authorities have been capable of establish that Kulkov had an iCloud account tied to the handle nordexin@icloud.com, and upon subpoenaing that discovered passport photographs of Kulkov, and properly as extra photographs of his household and expensive vehicles.

Like many different high cybercriminals based mostly in Russia or in international locations with favorable relations to the Kremlin, the proprietor of Try2Check was not significantly troublesome to hyperlink to a real-life id. In Kulkov’s case, it little question was crucial to U.S. investigators that they’d entry to a wealth of non-public data tied to a cryptocurrency alternate Kulkov had used.

Nonetheless, the hyperlink between Kulkov and Try2Check may be made — mockingly — based mostly on information which were plundered by hackers and revealed on-line through the years — together with Russian electronic mail companies, Russian authorities information, and hacked cybercrime boards.


Kulkov posing along with his passport, in a photograph authorities obtained by subpoenaing his iCloud account.

In keeping with cybersecurity agency Constella Intelligence, the handle polkas@bk.ru was used to register an account with the username “Nordex” at bankir[.]com, a now defunct information web site that was nearly commonplace studying for Russian audio system curious about information about varied Russian monetary markets.

Nordex seems to have been a finance nerd. In his early days on the boards, Nordex posted a number of lengthy threads on his views concerning the Russian inventory market and mutual fund investments.

That Bankir account was registered from the Web handle in Samara, Russia, and included Nordex’s date of delivery as April 8, 1980, in addition to their ICQ quantity (228427661).

Cyber intelligence agency Intel 471 discovered that Web handle additionally was used to register the account “Nordex” on the Russian hacking discussion board Exploit again in 2006.

Constella tracked one other Bankir[.]com account created from that very same Web handle below the username “Polkas.” This account had the identical date of delivery as Nordex, however a unique electronic mail handle: nordia@yandex.ru. This and different “nordia@” emails shared a password: “anna59.”


Nordia@yandex.ru shares a number of passwords with nordia@listing.ru, which Constella says was used to create an account at a spiritual web site for an Anna Kulikova from Samara. On the Russian house furnishing retailer Westwing.ru, Ms. Kulikova listed her full identify as Anna Vnrhoturkina Kulikova, and her handle as 29 Kommunistrecheskya St., Apt. 110.

A search on that handle in Constella brings up a report for an Anna Denis Vnrhoturkina Kulkov, and the cellphone quantity 879608229389.

Russian car registration information have additionally been hacked and leaked on-line through the years. These information present that Anna’s Apt 110 handle is tied to a Denis Gennadyvich Kulkov, born April 8, 1980.

The car Kolkov registered in 2015 at that handle was a 2010 Ferrari Italia, with the license plate quantity K022YB190. The cellphone quantity related to this report — 79608229389 — is strictly like Anna’s, solely minus the (mis?)main “8”. That quantity is also tied to a now-defunct Fb account, and to the e-mail addresses nordexin@ya.ru and nordexin@icloud.com.

Kulkov’s Ferrari has been photographed quite a few occasions through the years by Russian automobile aficionados, together with this one with the driving force’s face redacted by the photographer:

The Ferrari owned by Denis Kulkov, noticed in Moscow in 2016. Picture: Migalki.web.

Because the title of this story suggests, the laborious half for Western regulation enforcement isn’t figuring out the Russian cybercriminals who’re main gamers within the scene. Fairly, it’s discovering inventive methods to seize high-value suspects if and after they do depart the safety that Russia typically extends to home cybercriminals inside its borders who don’t additionally hurt Russian firms or shoppers, or intrude with state pursuits.

However Russia’s conflict in opposition to Ukraine has prompted main fault traces to look within the cybercrime underground: Cybercriminal syndicates that beforehand straddled Russia and Ukraine with ease have been pressured to reevaluate many comrades who have been immediately working for The Different Facet.

Many cybercriminals who operated with impunity from Russia and Ukraine previous to the conflict selected to flee these international locations following the invasion, presenting worldwide regulation enforcement companies with uncommon alternatives to catch most-wanted cybercrooks. A kind of was Mark Sokolovsky, a 26-year-old Ukrainian man who operated the favored “Raccoon” malware-as-a-service providing; Sokolovsky was apprehended in March 2022 after fleeing Ukraine’s obligatory navy service orders.

Additionally nabbed on the lam final 12 months was Vyacheslav “Tank” Penchukov, a senior Ukrainian member of a transnational cybercrime group that stole tens of hundreds of thousands of {dollars} over practically a decade from numerous hacked companies. Penchukov was arrested after leaving Ukraine to satisfy up along with his spouse in Switzerland.