On Xinbi Guarantee, Elliptic found numerous posts from vendors offering to accept funds related to “quick kills,” “slow kills,” and “pig butchering” transactions, all different terms for crypto investment scams and other forms of fraud. In some cases, Robinson explains, these Xinbi Guarantee vendors offer bank accounts in the same country as the victim so that they can receive whatever payment they’re tricked into making, then pay the scammer in the cryptocurrency Tether. In other cases, the Xinbi Guarantee merchants offer to receive cryptocurrency payments and cash them out in the scammer’s local currency, such as Chinese renminbi.
Not just money laundering
Aside from Xinbi Guarantee’s central use as a cash-out point for crypto scammers, Elliptic also found that the market’s vendors offered other wares for scammers such as stolen data that could be used for finding victims, as well as services for registering SIM cards and Starlink Internet subscriptions through proxies.
North Korean state-sponsored cybercriminals also appear to have used the platform for money laundering. Elliptic found through blockchain analysis, for instance, that about $220,000 stolen from the Indian cryptocurrency exchange WazirX—the victim of a $235 million theft in July 2024, widely attributed to North Korean hackers—had flowed into Xinbi Guarantee in a series of transactions in November.
Those money-laundering and scam-enabling services, however, are far from the only shady offerings found on Xinbi Guarantee’s market. Elliptic also found listings for surrogate mothers and egg donors, with one post showing faceless pictures of the donor’s body. Other accounts have offered services that will, for a payment in Tether, place a funeral wreath at a target’s door, deface their home with graffiti, post damaging statements around their home, have someone verbally threaten them, throw feces at them, or even, most bizarrely, surround their home with AIDS patients. One posting suggested these AIDS patients would carry “case reports and needles for intimidation.”
