Crypto exchange Kraken temporarily restricted some customer accounts after nearly 12,000 unsolicited transfers of small amounts of cryptocurrency arrived at addresses linked to the platform between August 17 and 24. The transfers, mostly valued between a few cents and several dollars, originated from a wallet associated with the Chinese exchange HTX, formerly known as Huobi.

Kraken described the activity as a dust attack intended to place sanctioned funds into unrelated accounts and force compliance reviews. The exchange restored access to the affected accounts after its compliance team completed reviews, while continuing to segregate and hold the disputed funds as required under applicable rules.

Wallet Attribution and HTX Response

Blockchain analytics firm Arkham Intelligence identified the sending wallet as connected to HTX based on addresses previously disclosed by the exchange in its proof-of-reserves reports. That association places the address within the HTX ecosystem but does not establish who controlled the wallet or directed the individual transfers at the time they occurred.

HTX has denied any official role in the activity. A representative stated that an internal review of accounts found no evidence the company initiated the transfers. The exchange is examining whether address-labeling issues, operational misunderstandings, or third-party misuse of associated wallets could explain the activity. HTX also noted that similar small transfers had reached addresses linked to other major platforms, including Coinbase and Binance, prior to the Kraken disclosures.

HTX suggested that some affected Kraken customers may have taken independent actions after their own funds were frozen, though no independent confirmation has linked those claims to the volume of 12,000 transfers. The exchange has not released a full list of addresses or detailed transaction analysis supporting its position.

Sanctions Timeline Adds Scrutiny

The transfers coincided with tightening restrictions on HTX. The United Kingdom designated Huobi Global S.A. under its Russia-related sanctions regime on May 26, imposing an asset freeze and limits on processing related payments. HTX has disputed the breadth of that designation, arguing that Huobi Global S.A. is legally distinct from its operating exchange.

The European Union subsequently added HTX, identified as Huobi Global S.A., to a list of crypto service providers subject to a transaction ban. That restriction took effect on August 23, near the end of the transfer window. The timing meant deposits arriving shortly before and after the EU measure became active faced heightened screening by platforms serving UK or EU customers.

Blockchain researchers had earlier reported that HTX rotated wallets following the UK designation. The exchange described those changes as standard security measures rather than efforts to circumvent restrictions.

Compliance Challenges for Exchanges

The episode illustrates a recurring difficulty for centralized platforms. A blockchain transaction can reach a public deposit address without the recipient’s consent or prior knowledge. Automated screening systems that flag exposure to sanctioned wallets can then restrict accounts even when the customer neither requested nor controlled the incoming funds.

Kraken characterized the pattern as an effort to spread UK- and EU-sanctioned funds across other platforms in order to create operational friction and undermine confidence in compliance processes. The exchange stated it is cooperating with authorities to limit any intended disruption.

Kraken has not disclosed the number of customers affected, the precise duration of the temporary restrictions, or the aggregate value of the segregated funds. Its public status page did not report a platform-wide outage tied to the incident.

Traditional dusting campaigns have historically aimed at tracking wallet activity. In this case, the volume and timing aligned more closely with attempts to generate compliance exposure through unsolicited deposits. Platforms must evaluate factors such as transfer size, timing, ownership history, and customer behavior rather than treating every inbound transaction from a flagged address as evidence of deliberate violation.

Neither Kraken nor HTX has announced a joint investigation or a firm timeline for further public updates. Clarity is expected to depend on additional wallet-level evidence identifying the true originator of the transfers or further guidance from UK and EU authorities.