$3M worth of customer funds swiped via alleged Swaprum DEX rug pull

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Arbitrum-based decentralized exchange (DEX) Swaprum has allegedly conducted a rug-pull on its users, with $3 million worth of customer deposits being swiped from the platform.

A rug pull or exit scam occurs when a seemingly legitimate project gathers investment or user deposits before promptly shutting everything down, pulling the capital and vanishing — if they adequately cover their tracks.

According to May 19 tweet from the alerts-focused account of blockchain security firm PeckShield, the bad actors swiped 1,628 Ether (ETH) — worth roughly $2.95 million at current prices — from Swaprum’s liquidity pools, bridged it to Ethereum and “laundered” almost all of the funds through crypto mixer Tornado Cash.

Following the incident, Swaprum’s Twitter, Telegram and GitHub accounts have all been deleted; however, Swaprum’s website is still operational at the time of writing.

Phemex
Deleted socials. Source: Twitter

Adding extra context to the incident, fellow blockchain security firm Beosin claimed that the “deployer of Swaprum used the add() backdoor function to steal LP [liquidity provider] tokens staked by users, then removed liquidity from the pool for profit.”

This was made possible due to the Swaprum developer team allegedly “upgrading the normal liquidity collateral reward contract to a contract containing backdoor functions.”

A keyword search for “Swaprum” on Twitter yields several tweets from people calling out smart contract auditors CertiK, as the firm had conducted an audit of the platform as recently as May 5.

Related: Can you recover stolen Bitcoin from crypto scams?

Their complaints essentially assert that CertiK signed off on the platform by auditing it, with the “audited by CertiK” logo still currently on the Swaprum website.

However, as per CertiK’s disclaimers, it “conducts security assessments on the provided source code exclusively” and can’t guarantee that its recommendations are integrated. In the audit, CertiK flagged a “major” issue with how centralized Swaprum was.

It also seems that the backdoor-related upgrades to the project’s smart contracts were conducted after the audit.

As it stands, CertiK’s website has now flagged Swaprum as an “exit scam.”

Swaprum audit. Source: CertiK

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