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THREAT ACTORS STOLE AT LEAST $1.7M WORTH OF NFTS FROM TENS OF OPENSEA USERS

February 20, 2022  By Pierluigi Paganini


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THREAT ACTORS HAVE STOLEN AND FLIPPED HIGH-VALUED NFTS FROM THE USERS OF THE
WORLD’S LARGEST NFT EXCHANGE, OPENSEA.

The world’s largest NFT exchange, OpenSea on Sunday confirmed that tens of some
of its users have been hit by a phishing attack and had lost valuable NFTs worth
$1.7 million.

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The phishing attack was confirmed by OpenSea Co-Founder and CEO, Devin Finzer,
he also added that 32 users have lost NFTs.



The analysis of the attacker’s walled revealed it contained $1.7 million of ETH
(Ethereum) obtained by selling some of the stolen NFTs. Finzer pointed out that
the company doesn’t believe the hack is connected to the OpenSea website.

“Blockchain records show that the attacker was able to transfer numerous NFTs
from different users to their address for free. Stolen NFTs included examples
from the Bored Ape Yacht Club, Mutant Ape Yacht Club, and several other popular
collections. The attacker has already sold some of the NFTs, for example, this
NFT from the Azuki collection for 13.4 ETH ($36,380). The attacker’s wallet
currently contains more than 600 ETH worth nearly $2 million.” reported
Motherboard.

According to the Blockchain security firm Peckshield the threat actors behind
the OpenSea hack used TornadoCash fully decentralized protocol for private
transactions on Ethereum to wash 1,100 ETH (approximately $2.7 million)



According to PeckShield, threat actors may have launched a phishing campaign
using the migration process as bait.

OpenSea is investigating rumors of an exploit associated with OpenSea related
smart contracts that may have been exploited by attackers.



The attack was linked to the announcement of the marketplace of a new smart
contract upgrade with a one-week deadline aimed at delisting inactive NFTs on
the platform.



In order to upgrade the smart contract, users have to migrate their listed NFTs
from ETH blockchain to a new smart contract. However, impacted users started
reporting suspicious activities within hours after the upgrade announcement.

Finzer asked impacted users to get in contact with him via Twitter DM.

Follow me on Twitter: @securityaffairs and Facebook



Pierluigi Paganini

(SecurityAffairs – hacking, NFT)





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PIERLUIGI PAGANINI

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and
Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he
is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security
expert with over 20 years experience in the field, he is Certified Ethical
Hacker at EC Council in London. The passion for writing and a strong belief that
security is founded on sharing and awareness led Pierluigi to find the security
blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some
major publications in the field such as Cyber War Zone, ICTTF, Infosec Island,
Infosec Institute, The Hacker News Magazine and for many other Security
magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency
and Bitcoin”.




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