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Security1 publisher2 min readPublished

Xinbi Guarantee answers a $52.8m seizure by migrating to a harder-to-freeze stablecoin

Treasury sanctioned the $24 billion Chinese-language escrow marketplace on Wednesday and the Secret Service pulled $52.8 million out of 52 wallets, about 0.22 percent of what Xinbi has cleared since 2022.

The Watch · Security desk

What happened

  • Treasury sanctioned the Chinese-language Telegram marketplace Xinbi Guarantee along with Anwen Technology, the Cambodia-based developer of the XinbiPay app, and SafeW Technology, maker of an encrypted messenger.
  • The Secret Service, helped by blockchain intelligence firm Elliptic, seized $52.8 million from 52 cryptocurrency wallets connected to the platform.
  • Elliptic puts Xinbi's volume since its 2022 launch at a minimum of $24 billion and calls it the second-largest illicit online marketplace in history.

Compiled by The WatchSomething wrong?How this is made

Why it matters

  • precedent Telegram's removal of Huione Guarantee relocated the escrow business rather than ending it, and this time the designation attaches to named operators and firms, so a successor inherits a liability a fresh channel did not.
  • constraint The reach of this operation depended on one stablecoin issuer answering a request; a marketplace settling in something Tether does not control takes that option away from the next investigation.
  • cost The immediate loss falls on the 4,600-plus vendors who paid Xinbi for assurance they would be paid, not on the syndicates staffing the compounds their customers run.
  • decision The task force says it will now pursue compounds worldwide, so the escrow-layer approach runs alongside physical raids like Madagascar's rather than replacing them.

$52.8 million against at least $24 billion cleared since 2022 is 0.22 percent of throughput [3][8][20]. The leverage sat in the currency. Every payment on Xinbi settled in Tether's USDT [9], and Tether cooperated with the Scam Center Task Force, which is how investigators reached two wallets holding $12 million of collected vendor payments plus dozens more [14]. Those two addresses account for 23 percent of everything seized [21]. Xinbi's administrators then told users they would move to USDD on the TRON blockchain, which Elliptic describes as harder to seize [15], and called Tether's freezes arbitrary [16].

That response has a precedent worth reading closely. Telegram removed Huione Guarantee after international pressure, by which point it had processed $31 billion [10]. Xinbi grew into the vacancy, and Telegram declined to remove it even after researchers asked [11]. Across the two platforms, $55 billion has passed through the guarantee layer [24]. A channel deletion moved the business to a new channel; a designation follows the operators and the two firms named alongside them, including Anwen Technology, the Cambodia-based developer of the XinbiPay app, and SafeW Technology [18].

DarkTower counted more than 4,600 crime-as-a-service vendors on the platform last week [12], which works out to roughly $5.2 million of lifetime throughput each [23]. What those vendors bought was escrow: assurance that a supplier of laundering, stolen personal data or deepfake tooling actually got paid [9]. That is the function the warrant hit. A district court authorized seizure of the hosting Telegram channels on Monday, and by Wednesday the main channel was down and associated usernames deactivated [6][5].

The same announcement complicates any clean story about enforcement moving up a layer. The task force, created last November to target scams run largely by Chinese organized crime groups in Southeast Asia [13], said it would expand its scope to scam compounds globally and had already sent a team to Madagascar, where 13 centers were taken down and dozens of alleged leaders arrested [19]. US attorney for the District of Columbia Jeanine Pirro said those leaders were quickly repatriated to China [19]. The arrests in Wednesday's package were Madagascan. The Xinbi package was sanctions, a warrant and wallet freezes [2][7][3].

Elliptic cofounder Tom Robinson told The Record he expects Xinbi to try to rebuild and relaunch, and that sanctions will make that very challenging [17]. The testable part is narrower than the forecast: whether an issuer other than Tether freezes addresses on request. If USDD holds, the capability that produced $52.8 million does not transfer to whatever replaces Xinbi, and the next disruption will need a different handle.

What to watch

  • Whether Xinbi's USDD migration completes, and whether anyone can freeze TRON-based USDD balances on request.
  • Whether Telegram removes Xinbi successor channels on its own initiative or waits for another seizure warrant.
  • Whether the Scam Center Task Force follows the sanctions with an indictment naming Xinbi's administrators.
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