Blockchain & Cryptocurrency
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Cryptocurrency Fraud
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Fraud Management & Cybercrime
Also: Winkle Abduction Sentencing and Crypto Theft Rising

Every week, Information Security Media Group rounds up cybersecurity incidents in digital assets. This week, uncovering 40 malicious crypto Firefox extensions, three sentenced in a Belgium court for crypto kidnapping, the rise of crypto theft. The U.S. Secret Service is a huge crypto custodian, and prosecutors claw back funds pilfered by a fake presidential inaugural committee.
See Also: OnDemand | NSM-8 Deadline July 2022:Keys for Quantum-Resistant Algorithms Implementation
More Than 40 Malicious Firefox Extensions Identified
A security researcher uncovered a large-scale crypto scam that used more than 40 fake malicious Mozilla Firefox extensions to steal cryptocurrencies.
The campaign, dubbed FoxyWallet, used extensions that mimic legitimate wallets used in platforms such as Coinbase, MetaMask, Trust Wallet, Phantom and Exodus.
The campaign begins when the victims download any of the extensions, after which it exfiltrates wallet credentials and IP addresses from the victims’ browsers.
The campaign has been active since April and operators continued to add malicious extensions until June. Russian-speaking hackers are likely behind the campaign, said researcher Yuval Ronen.
A Belgian Court Sentences Crypto Kidnapers
A Belgian criminal court sentenced three adults to 12 years each for their participation in the abduction of crypto investor and coach Stéphane Winkel’s wife. A judge also ordered the kidnappers to pay at least one million euros in damages to the victims, local news outlet Dernière Heure reported.
Kidnappers forced Winkel’s wife into a van in December 2024 outside their home in the town of Forest, demanding a ransom for her freedom. Police gave chase and cornered the van in a road near Bruges. Authorities arrested four individuals, including a teenager who was referred to juvenile court.
The court dismissed defendants’ claims that they were participated in the crime only after being threatened with killing. Authorities are continuing to pursue the criminal mastermind, who is at large.
Crypto Theft Rising
Crypto thieves collectively stole digital assets worth $2.1 billion during first half of 2025, calculates TRM Labs.
The largest hack during that time was a compromise of Dubai-based crypto exchange Bybit, which TRM Labs attributed to North Korean hackers. “This incident alone accounted for nearly 70% of total losses so far this year,” TRM said. The hack also pushed up the size of an average hack to $30 million, double the $15 million average during the same period last year.
North Korean hackers continue to be top threat actors, but other nation-state hackers may be joining in the fun. TRM cited the June hack of Nobitex, Iran’s largest crypto exchange, by hacker group Gonjeshke Darande, also called Predatory Sparrow, widely suspected of being an Israeli intelligence agency operation. (see: Cryptohack Roundup: $100 Million Iranian Cryptocurrency Hack).
The US Secret Service Recovered Nearly $400 Million in Crypto
The U.S. Secret Service recovered nearly $400 million in crypto from criminals in operations over the last decade, Bloomberg reported, citing unidentified officials. Much of that trove sits in a “single cold-storage wallet,” making the agency the world’s biggest crypto custodians, the report said. The agency previously played a central role in cracking down early forms of cryptocurrencies such as Liberty Reserve and E-Gold.
DOJ Seeks Recovery of Seized Crypto
The U.S. Department of Justice is seeking to recover Ethereum seized by the FBI in connection with a business email compromise campaign impersonating Trump-Vance Inaugural Committee.
U.S. Attorney Jeanine Ferris Pirro filed a complaint to recover 40,353 USDT.ETH, valued at over $40,300 to compensate a victim who donated around $250,300 worth of cryptocurrency to a fake Trump-Vance Inaugural Committee.
The victims transferred the amount after receiving an email that appeared to come from Steve Witkoff, co-chair of the Trump-Vance Inaugural Committee. An FBI investigation by the FBI traced the scammer to Nigeria and was able to recover $40,353 of the pilfered amount.
“All donors should double and triple check that they are sending cryptocurrency to their intended recipient. It can be extremely difficult for law enforcement to recoup lost funds due to the extremely complex nature of the blockchain,” Pirro said.
