A cybercriminal hacked the social media accounts of the British Army to drag people toward cryptocurrency scams.

The UK army’s Twitter and YouTube profiles were taken over by the hacker, or hackers — the identity of whom is not yet known — on Sunday. The Twitter account’s name was changed to “pssssd,” and its profile and banner pictures were changed to resemble a nonfungible token collection called “The Possessed.”

The hacked official Twitter account warned users of a “new verified SCAM account” impersonating the collection of NFTs — tokens representing ownership of pieces of online content.

Earlier Sunday, the account was renamed “Bapesclan” — the name of another NFT collection — while its banner image was changed to a cartoon ape with clown makeup on. The hacker also began retweeting posts promoting NFT giveaway schemes.

The name of the U.K. military’s YouTube account, meanwhile, was changed to “Ark Invest,” the investment firm of Tesla and bitcoin bull Cathie Wood.

The hacker deleted all the account’s videos and replaced them with live streams of old clips taken from a conversation with Elon Musk and Twitter co-founder Jack Dorsey on bitcoin that was hosted by Ark in July 2021. Text was added to the live streams directing users to crypto scam websites.

Both accounts have since been returned to their rightful owner.

“The breach of the Army’s Twitter and YouTube accounts that occurred earlier today has been resolved and an investigation is underway,” Britain’s Ministry of Defense tweeted Monday.

“The Army takes information security extremely seriously and until their investigation is complete it would be inappropriate to comment further.”

A Twitter spokesperson confirmed the British Army’s account “was compromised and has since been locked and secured.”

“The account holders have now regained access and the account is back up and running,” the spokesperson told CNBC via email.

A YouTube representative was not immediately available for comment when reached by CNBC.

Tobias Ellwood, a British Conservative lawmaker who chairs the defense committee in Parliament, said the breach “looks serious.”

“I hope the results of the investigation and actions taken will be shared appropriately.”

It’s not the first time a high-profile social media account has been exploited by hackers to promote crypto scams. In 2020, the Twitter accounts of Musk, President Joe Biden and numerous others were taken over to swindle their followers of bitcoin.