SandwichAttack.md

This is a MEV (Maximal Extractable Value) bot contract designed to perform sandwich attacks and arbitrage on decentralized exchanges. Here's a breakdown of what it does:

Key Components:

Owner & Access Control

• Owner: 0x6c8ec8f14be7c01672d31cfa5f2cefeab2562b50
• Target DEX: 0x764c64b2a09b09acb100b80d8c505aa6a0302ef2 (likely a DEX router)
• Token: 0xf65b5c5104c4fafd4b709d9d60a185eae063276c (token being traded)

Main Attack Functions:

1. attack(uint256 bribeAmount) (0x64dd891a)

// Performs sandwich attack with miner bribe
function attack(uint256 bribeAmount) external onlyOwner {
    // Loop through 5 stored pool addresses
    for (uint i = 0; i < 5; i++) {
        address pool = pools[i];
        
        // 1. Get quote from pool
        uint256 amountOut = pool.getAmountOut(poolAddress);
        
        // 2. If profitable, buy tokens
        if (amountOut <= balance) {
            pool.swap(poolAddress, amountOut);
            
            // 3. Check token balance
            uint256 tokenBalance = token.balanceOf(address(this));
            
            // 4. Approve and sell tokens back
            token.approve(pool, tokenBalance);
            pool.sell(tokenBalance);
            
            // 5. Calculate profit
            uint256 profit = currentBalance - initialBalance;
            
            // Emit trade event
        }
    }
    
    // 6. Pay miner bribe to get transaction included first
    require(profit > bribeAmount, "Not profitable after bribe");
    block.coinbase.transfer(bribeAmount);
    
    // 7. Withdraw remaining profit to owner
    owner.transfer(address(this).balance);
}

2. Unknown function 0x4b70f3ed

// Similar attack without specifying bribe amount
// Loops through same 5 pools performing trades

3. Unknown function 0xe99b36d4(address, uint256)

// Single-pool attack with specific parameters
// Takes pool address and bribe amount as inputs

Supporting Functions:

• withdraw() - Sends all ETH to owner
• withdrawToken(address) - Sends all tokens of specified address to owner
• owner() - Returns owner address
• target() - Returns target DEX address

How the Attack Works:

1. Monitor mempool for large pending trades
2. Front-run: Submit transaction with higher gas to execute BEFORE victim
   • Buy tokens, driving price up
3. Victim's transaction executes at worse price
4. Back-run: Immediately sell tokens at profit
5. Bribe miner with part of profits to ensure transaction ordering
6. Withdraw profits to owner

Malicious Aspects:

• ✗ Exploits transaction ordering for profit
• ✗ Harms regular users by increasing their slippage
• ✗ Uses miner bribes (payments to block.coinbase) to guarantee execution order
• ✗ Multiple attack vectors for flexibility
• ✗ Hardcoded pools array for quick execution

This is a classic MEV sandwich attack bot that extracts value from unsuspecting traders on DEXs.