A recent Bitcoin scam on Twitter that compromised many major corporations’ verified accounts came from a third-party app, tech news outlet the next web (TNW) reports Friday, Nov. 16, citing social media officers.

Speaking to TNW, a Twitter representative confirmed that the attack came from an outside software system supplier and not from Twitter’s own system. However, the official kept away from naming the app.

The representative reportedly explained that the attackers exploited a third-party promoting solution to launch a Bitcoin (BTC) giveaway from many verified accounts, as well as Google’s G Suite and major U.S. department store retailer Target.

The information was implicitly confirmed by Target. Its representatives told TNW that the hackers used a third-party promoting app, approved to post content on Target’s behalf.

As TopMarketGroup previously reported, on Wed, Nov. 14, hackers took over G Suite and Target accounts (800,000 and 1.92 million followers, respectively) and announces malicious cryptocurrency giveaway links. The message in G Suite’s account additionally falsely claimed that users may create payments in G Suite using cryptocurrencies.

Moreover, in early November many verified Twitter accounts, as well as those of film production firm Pathe U.K. and U.S. politician Frank pallone Jr., were broken to create as Elon Musk. Once hackers gained control of accounts, they modified the profile image and name so as to create as Elon Musk and provide scammy Bitcoin giveaways.

Bitcoin scammers have already exhibit as Elon Musk for many times, prompting the Tesla founder to hunt help from Jackson palmer, the creator of Dogecoin (DOGE), who claimed to own invented an anti-scam script.