
Kraken locked some accounts after 12,000 dust transfers from HTX-linked wallets triggered compliance freezes. The exchange restored access but still holds funds subject to sanctions.
Kraken temporarily locked customer accounts after nearly 12,000 small cryptocurrency transfers from wallets linked to sanctioned exchange HTX reached Kraken-linked addresses over eight days, the exchange said.
The transfers, most worth only a few cents to several dollars, arrived between August 17 and August 24, Bloomberg reported. Kraken described the activity as a possible "dust attack", a tactic where tiny amounts of crypto are sent to numerous addresses, potentially triggering compliance reviews or contaminating transaction histories for unsuspecting recipients.
Kraken has since restored access to affected accounts. The exchange continues to hold funds it considers subject to sanctions.
Blockchain analytics firm Arkham Intelligence linked the sending wallet to HTX based on an address the exchange had previously disclosed as part of its proof-of-reserves information, Bloomberg reported. HTX denied directly sending the transfers and said it is investigating whether the wallet was misidentified or used by a third party without its involvement.
A Kraken spokesperson said the attack appeared to be an attempt to distribute funds subject to UK and European Union sanctions across other platforms and potentially undermine confidence in the crypto industry's compliance systems. The exchange is investigating the transactions and working with authorities. It has not publicly established who controlled the sending wallet when the transfers were made.
The dust transfers came as international scrutiny of HTX intensified.
The United Kingdom designated Huobi Global S.A., the corporate entity tied to HTX, under its Russia sanctions regime on May 26. British authorities determined there were reasonable grounds to suspect Huobi Global S.A. supported the Russian government by offering financial services or making funds available to entities linked to Russia.
The European Union added Huobi Global S.A. to its sanctions list as part of its 21st package of sanctions against Russia, adopted July 23. EU officials stated the package specifically targets cryptocurrency platforms and networks involved in helping Russia circumvent financial sanctions. A transaction ban prohibiting EU citizens and businesses from conducting operations with HTX took effect August 23.
Kraken's compliance freeze shows how a deliberate dust attack can exploit blockchain transparency and automated sanctions screening to disrupt exchange infrastructure. The incident also signals the operational risk exchanges face when sanctioned entities' wallets interact with their platforms through small, hard-to-filter transactions.
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