The Federal Bureau of Investigation (FBI) on Monday claimed it has seized $2.3 million worth of Bitcoin paid by the Colonial Pipeline in a ransomware attack after obtaining a court order. The alleged funds were found on a North California server, but the federal agency refused to clarify how they managed to access the Bitcoin wallet. The DOJ claimed,
Law enforcement was able to track multiple transfers of bitcoin and identify that approximately 63.7 bitcoins, representing the proceeds of the victim’s ransom payment, had been transferred to a specific address, for which the FBI has the “private key,” or the rough equivalent of a password needed to access assets accessible from the specific Bitcoin address.
The early perception was that the FBI managed to get their hands on the private key to the Bitcoin wallet, but people with the understanding of the matter questioned how a hacker group so sophisticated that managed to shut down the whole infrastructure could not keep the private keys to their Bitcoin wallet safe.
One theory suggests that the hackers had put the Bitcoin into a custodian wallet of exchange in North California for selling and the FBI managed to track the funds and seize them before it could have been liquidated. This is more believable since the agency won’t need a court order to seize Bitcoin if they had private key access.
Here’s a perfect example of the confusion. Why do you need a court order if you have the password to their wallet? The reverse is also true. If the bitcoin was transferred to a custodial wallet, you dont need the password (keys). https://t.co/BnXqqrWnlX
— Jordan Schachtel (@JordanSchachtel) June 7, 2021
Does FBI’s Action Raise Bitcoin Network Vulnerability Concerns?
Connecting the dots between the Federal agency’s claims and how the Bitcoin network functions, it seems there was no breach of security on the Bitcoin network. The FBI can for sure get a warrant to seize the funds from a custodial wallet, or against an exchange, which seems to be the case here.
One of the agency’s spokesperson revealed that they cannot dwell into the means that the FBI used to gain access to the ransom Bitcoin and said,
“I don’t want to give up our tradecraft in case we want to use this again for future endeavors,”
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