[华为杯研究生创新赛 2023] 初赛 REV WP

前言

一年没打比赛了, 差一题进决赛, REV当时lin的第三个challenge没看出来是凯撒, 想得复杂了, 结果错失一次线下机会 >_<

T4ee

动态调试, nop掉反调试代码

发现处理过程为

• 置换
• sub_412F20处理(这里看其他师傅的wp知道应该是rc4, 我是直接en逆的
• buf字符串中每一位和下一位异或

最后和byte_41C004数组比较
逆过程则反过来

permut_table = [
   18, 157, 158, 161, 223,  37, 194, 130, 115, 251, 
  116, 227, 190, 128, 208, 109, 255, 127,  31, 111, 
   17,  74, 153, 118,  14,  67, 204,  75, 179,  69, 
   47, 154, 133,   0, 160,   3, 207, 246, 209,  41, 
  205,  22, 254,  15,  70, 144, 249, 178, 238, 114, 
   54,  65, 164, 220, 123,  27,   2,  24,  52,  19, 
   16,  49, 107, 252, 234, 183,  78, 110,  85,  64, 
   96,  72,  56,  60,  33,  57,  36, 120, 165,  63, 
  112, 216,  83,  11, 217,  35, 180, 198,  13, 201, 
  250, 129, 170, 167,  10, 163, 231,  39, 244, 172, 
  137, 132, 240, 210, 113,  12, 195, 124,  93, 193, 
  224, 186, 104,  98,   5, 131, 199,  82, 202, 142, 
  145,  42, 196, 147, 197,  30, 152, 215,  68, 226, 
   73, 177, 146, 173,  76, 247, 119, 230,   4,  25, 
  176,  89,  91, 232,  90, 150, 125, 225, 181, 175, 
  182, 106,  46, 218,   9, 122, 239, 200, 211,  59, 
  243, 143, 206, 135,  99, 228,  29, 213, 141,  21, 
  185, 117,   7, 156, 253, 126,  50, 184, 214,  23, 
   28,  20, 241, 162,  97, 138,  88,  94,  58, 235, 
  212, 151, 140,  26, 169, 166,  87, 171, 248, 148, 
  222, 192,  92,  86, 245, 102,  53,  62, 100, 139, 
   34,  40, 159,  79,  38,  44,   6,  84,  48, 229, 
  121,  77,  51, 237, 103, 174,  66, 134, 203, 189, 
  149, 233,  95,  45,   8, 136,  32,  55, 101,   1, 
   61, 219, 155,  81,  71, 168, 105, 221, 236, 187, 
  108,  80,  43, 191, 242, 188
]

checklist = [
    44,  64, 206, 136, 234, 179, 167, 250, 190, 227, 
    50, 217, 139, 228,  28, 119, 252, 212, 118, 171, 
    135,  65, 176, 206, 245,  94,  97, 134, 168, 207, 
    113, 153,  92, 177
]

for i in range(32, -1, -1):
    checklist[i] = checklist[i + 1] ^ checklist[i]

flag_tmp = [0 for _ in range(34)]

v6, v7 = 0, 0
for i in range(0, 34, 1):
    v7 = (v7 + 1) % 256
    v6 = (v6 + permut_table[v7]) % 256
    v5 = permut_table[v7]
    permut_table[v7] = permut_table[v6]
    permut_table[v6] = v5

    # brute force every byte
    for k in range(1, 128):
        tmp = k ^ permut_table[(permut_table[v6] + permut_table[v7]) % 256]
        if tmp == checklist[i]:
            flag_tmp[i] = k

print(flag_tmp)

change_table = [
    7, 3, 15, 18, 0, 6, 25, 21, 20, 2,
    29, 12, 14, 17, 5, 19, 11, 22, 8, 1, 
    27, 10, 31, 30, 4, 26, 28, 32, 33, 13,
    16, 9, 23, 24
]

flag = ''
for i in range(34):
    flag += chr(flag_tmp[change_table[i]])

print(flag)
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这题很坑的地方是, 静态分析判断的函数调用顺序不是实际执行顺序, 很坑, 浪费了大量时间
动调几遍最后才确定的函数调用顺序

easy_xors

有一些花指令, 影响反编译, 直接读汇编
这里有个反调试, 直接nop掉, 或者用插件绕过

定位到xor代码

动调提取xor的数组, xor回去就行

checklist = [
  153,  72,  94, 189, 197, 155, 133, 150,  32, 252, 
   24, 178,   0, 197, 218, 192, 177, 200, 108, 129, 
   99, 189,   9,  80, 194, 187, 236,  51, 214, 215, 
  143, 175, 173, 206,  20, 237, 140, 206, 111, 169, 
  168,   2, 140, 144, 148, 103
]

xor_list = [
    0xFF, 0x24, 0x3F, 0xDA, 0xBE, 0xA9, 0xB6, 0xF7, 0x12, 0x8F, 
    0x29, 0xD0, 0x73, 0xF7, 0xF7, 0xA2, 0x83, 0xAD, 0x5F, 0xB0, 
    0x51, 0x90, 0x3F, 0x68, 0xF6, 0x8C, 0xC1, 0x0A, 0xB7, 0xB5, 
    0xBC, 0x82, 0xCC, 0xFC, 0x67, 0xDE, 0xE9, 0xFF, 0x5B, 0xCB, 
    0xC9, 0x67, 0xEA, 0xF6, 0xA6, 0x1A
]

flag = ''
for i in range(len(checklist)):
    flag += chr(checklist[i] ^ xor_list[i])

print(flag)
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小林的世界

一共三个challenges, 前两个的key是rot13处理, 第一个是hasaki, 第二个是vxnfnu

base64串

第三个challenge, 可以看到后面有个base64串, 解出来是DASCTF{hasaki-pdtzptz-vxnfnu}, 输入进去不对, 动态调试查看一下中间值, 发现输入进去的pdtzptz会变成uiyeuye, 猜测是凯撒加密, 偏移为5

pdtzytz凯撒解密回去, 就是kyoukou
最后得到flag: DASCTF{hasaki-kyoukou-vxnfnu}

Robbie gave up

Unity 逆向, dnSpy打开Robbie gave up_Data\Managed\Assembly-CSharp.dll, 定位到关键代码Robbie.win(), 这个关键函数的定位一个一个object看就行

// Robbie
// Token: 0x0600005C RID: 92 RVA: 0x0001080C File Offset: 0x0000EA0C
public static object Win()
{
	for (int i = GameManager.instance.orbs.Count; i < Robbie.data1.Length; i++)
	{
		Robbie.data2[i] = (byte)(Robbie.data1[i] ^ i);
	}
	Type type = Assembly.Load(Robbie.data2).GetType("ClassLibrary1.Class1");
	object obj = type.GetConstructor(Type.EmptyTypes).Invoke(new object[0]);
	return type.GetMethod("Method").Invoke(obj, null).ToString();
}
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和flag相关的数据都是硬编码在程序中的, 可以抽取关键逻辑出来, 在vscode装C#插件, 创建项目跑

当然也可以在线运行, 本地环境要求Microsoft.NETCore.App等SDK各种依赖, 需要一点配置时间

using System;
using System.Reflection;

namespace ConsoleApp
{
    class Robbie
	{
		// Robbie
		// Token: 0x04000084 RID: 132
		private static int[] data1 = new int[]
		{
			77,
			91,
			146,
			3,
			7,
			5,
			6,
			7,
			12,
			9,
			10,
			11,
			243,
			242,
			14,
			15,
			168,
			17,
			18,
			19,
			20,
			21,
			22,
			23,
			88,
			25,
			26,
			27,
			28,
			29,
			30,
			31,
			32,
			33,
			34,
			35,
			36,
			37,
			38,
			39,
			40,
			41,
			42,
			43,
			44,
			45,
			46,
			47,
			48,
			49,
			50,
			51,
			52,
			53,
			54,
			55,
			56,
			57,
			58,
			59,
			188,
			61,
			62,
			63,
			78,
			94,
			248,
			77,
			68,
			241,
			79,
			138,
			105,
			241,
			75,
			7,
			129,
			108,
			26,
			39,
			57,
			34,
			114,
			35,
			38,
			58,
			49,
			37,
			57,
			52,
			122,
			56,
			61,
			51,
			48,
			48,
			20,
			65,
			0,
			6,
			68,
			23,
			19,
			9,
			72,
			0,
			4,
			75,
			40,
			34,
			61,
			79,
			29,
			30,
			22,
			22,
			90,
			120,
			123,
			125,
			92,
			121,
			122,
			123,
			124,
			125,
			126,
			127,
			208,
			196,
			130,
			131,
			200,
			132,
			133,
			135,
			232,
			8,
			43,
			63,
			140,
			141,
			142,
			143,
			144,
			145,
			146,
			147,
			116,
			149,
			180,
			183,
			147,
			152,
			170,
			155,
			156,
			141,
			158,
			159,
			160,
			167,
			162,
			163,
			164,
			165,
			166,
			167,
			38,
			134,
			170,
			171,
			172,
			141,
			174,
			175,
			176,
			241,
			178,
			179,
			180,
			181,
			182,
			167,
			184,
			153,
			186,
			187,
			188,
			191,
			190,
			191,
			196,
			193,
			194,
			195,
			196,
			197,
			198,
			199,
			206,
			201,
			202,
			203,
			204,
			205,
			206,
			207,
			208,
			81,
			210,
			211,
			212,
			215,
			214,
			215,
			216,
			217,
			218,
			219,
			223,
			221,
			190,
			90,
			224,
			225,
			242,
			227,
			228,
			245,
			230,
			231,
			232,
			233,
			250,
			235,
			236,
			253,
			238,
			239,
			240,
			241,
			242,
			243,
			228,
			245,
			246,
			247,
			248,
			249,
			250,
			251,
			252,
			253,
			254,
			255,
			320,
			302,
			258,
			259,
			335,
			261,
			262,
			263,
			264,
			329,
			266,
			267,
			408,
			270,
			270,
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			288,
			321,
			290,
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			296,
			293,
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			296,
			297,
			298,
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			321,
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			323,
			324,
			325,
			326,
			327,
			328,
			329,
			330,
			331,
			332,
			333,
			334,
			335,
			336,
			337,
			338,
			339,
			340,
			341,
			342,
			343,
			344,
			377,
			346,
			347,
			340,
			349,
			350,
			351,
			352,
			353,
			354,
			355,
			356,
			357,
			358,
			359,
			352,
			329,
			362,
			363,
			292,
			365,
			366,
			367,
			368,
			369,
			370,
			371,
			372,
			373,
			374,
			375,
			342,
			269,
			287,
			259,
			264,
			381,
			382,
			383,
			276,
			398,
			386,
			387,
			388,
			421,
			390,
			391,
			392,
			409,
			394,
			395,
			396,
			399,
			398,
			399,
			400,
			401,
			402,
			403,
			404,
			405,
			406,
			407,
			408,
			409,
			410,
			411,
			444,
			413,
			414,
			511,
			398,
			467,
			465,
			465,
			455,
			421,
			422,
			423,
			316,
			426,
			426,
			427,
			428,
			493,
			430,
			431,
			432,
			437,
			434,
			435,
			436,
			423,
			438,
			439,
			440,
			441,
			442,
			443,
			444,
			445,
			446,
			447,
			448,
			449,
			450,
			451,
			388,
			453,
			454,
			391,
			486,
			443,
			431,
			423,
			419,
			430,
			462,
			463,
			476,
			465,
			466,
			467,
			468,
			437,
			470,
			471,
			472,
			475,
			474,
			475,
			476,
			459,
			478,
			479,
			480,
			481,
			482,
			483,
			484,
			485,
			486,
			487,
			488,
			489,
			490,
			491,
			428,
			493,
			494,
			429,
			496,
			497,
			498,
			499,
			500,
			501,
			502,
			503,
			504,
			505,
			506,
			507,
			508,
			509,
			510,
			511,
			624,
			558,
			514,
			515,
			516,
			517,
			518,
			519,
			576,
			521,
			522,
			523,
			526,
			525,
			523,
			527,
			672,
			565,
			530,
			531,
			644,
			543,
			534,
			535,
			537,
			537,
			538,
			539,
			540,
			541,
			542,
			543,
			544,
			545,
			546,
			547,
			548,
			549,
			550,
			551,
			552,
			553,
			554,
			555,
			556,
			557,
			558,
			559,
			560,
			561,
			562,
			563,
			564,
			565,
			566,
			567,
			568,
			569,
			570,
			571,
			572,
			573,
			574,
			575,
			576,
			577,
			578,
			579,
			580,
			581,
			582,
			583,
			584,
			585,
			586,
			587,
			588,
			589,
			590,
			591,
			590,
			595,
			634,
			579,
			596,
			597,
			604,
			637,
			558,
			603,
			626,
			587,
			604,
			605,
			596,
			605,
			531,
			624,
			610,
			611,
			622,
			536,
			613,
			615,
			616,
			621,
			616,
			537,
			517,
			621,
			622,
			543,
			525,
			627,
			626,
			627,
			624,
			607,
			556,
			629,
			515,
			632,
			634,
			635,
			632,
			593,
			633,
			637,
			763,
			640,
			642,
			643,
			640,
			687,
			644,
			764,
			650,
			649,
			650,
			655,
			678,
			767,
			653,
			679,
			646,
			657,
			658,
			665,
			697,
			647,
			660,
			703,
			655,
			665,
			666,
			657,
			671,
			754,
			646,
			671,
			672,
			683,
			650,
			687,
			676,
			677,
			672,
			653,
			683,
			643,
			728,
			680,
			644,
			699,
			686,
			687,
			698,
			668,
			672,
			667,
			675,
			693,
			694,
			701,
			698,
			698,
			658,
			688,
			700,
			701,
			696,
			720,
			729,
			705,
			706,
			713,
			750,
			710,
			748,
			665,
			715,
			741,
			728,
			739,
			731,
			717,
			718,
			709,
			722,
			722,
			762,
			735,
			724,
			725,
			720,
			696,
			704,
			729,
			730,
			721,
			758,
			713,
			756,
			641,
			739,
			717,
			752,
			737,
			716,
			754,
			742,
			743,
			738,
			746,
			645,
			754,
			748,
			749,
			740,
			711,
			763,
			753,
			754,
			757,
			734,
			737,
			732,
			645,
			762,
			642,
			761,
			763,
			764,
			761,
			657,
			741,
			768,
			769,
			776,
			796,
			836,
			811,
			778,
			773,
			778,
			882,
			776,
			779,
			780,
			777,
			806,
			778,
			784,
			785,
			788,
			825,
			854,
			790,
			782,
			831,
			827,
			793,
			794,
			785,
			770,
			770,
			814,
			880,
			772,
			801,
			802,
			809,
			782,
			775,
			805,
			831,
			768,
			780,
			810,
			811,
			806,
			775,
			814,
			815,
			803,
			769,
			816,
			819,
			806,
			821,
			822,
			823,
			825,
			825,
			826,
			810,
			846,
			828,
			830,
			831,
			816,
			843,
			817,
			832,
			836,
			837,
			832,
			833,
			864,
			846,
			842,
			843,
			842,
			871,
			846,
			847,
			835,
			865,
			849,
			851,
			950,
			853,
			854,
			855,
			858,
			857,
			858,
			842,
			862,
			806,
			861,
			863,
			864,
			869,
			781,
			881,
			868,
			869,
			876,
			869,
			875,
			788,
			875,
			875,
			876,
			873,
			876,
			788,
			881,
			881,
			882,
			887,
			857,
			856,
			884,
			780,
			890,
			889,
			890,
			895,
			886,
			875,
			885,
			852,
			920,
			903,
			901,
			1004,
			919,
			901,
			902,
			909,
			900,
			907,
			1009,
			904,
			908,
			909,
			906,
			903,
			1023,
			901,
			914,
			915,
			926,
			914,
			897,
			975,
			915,
			926,
			924,
			1012,
			905,
			925,
			926,
			917,
			914,
			894,
			904,
			929,
			991,
			932,
			934,
			935,
			940,
			966,
			959,
			939,
			940,
			935,
			945,
			1007,
			927,
			979,
			944,
			968,
			949,
			949,
			950,
			947,
			946,
			943,
			945,
			912,
			932,
			955,
			953,
			976,
			979,
			961,
			962,
			969,
			969,
			967,
			957,
			964,
			968,
			969,
			974,
			962,
			931,
			985,
			974,
			975,
			986,
			982,
			965,
			907,
			991,
			978,
			976,
			952,
			973,
			985,
			986,
			977,
			1006,
			770,
			968,
			972,
			996,
			970,
			1020,
			993,
			927,
			998,
			998,
			999,
			1004,
			1003,
			913,
			1001,
			1004,
			1005,
			1002,
			1022,
			1012,
			926,
			993,
			1011,
			1012,
			1023,
			921,
			995,
			1016,
			1017,
			1008,
			1002,
			1016,
			1002,
			934,
			1004,
			1028,
			1040,
			1030,
			1052,
			1092,
			1031,
			1149,
			1030,
			1032,
			1033,
			1038,
			1124,
			1049,
			1037,
			1038,
			1029,
			1097,
			1059,
			1218,
			1081,
			1026,
			1030,
			1043,
			1084,
			1030,
			1051,
			1121,
			1048,
			1052,
			1053,
			1050,
			1053,
			1115,
			1056,
			1058,
			1059,
			1056,
			1076,
			1059,
			1096,
			1083,
			1065,
			1066,
			1057,
			1091,
			1081,
			1070,
			1071,
			1082,
			1056,
			1079,
			1060,
			1132,
			1062,
			1075,
			1062,
			1085,
			1062,
			1146,
			1033,
			1248,
			1047,
			1086,
			1087,
			1107,
			1137,
			1092,
			1091,
			1128,
			1092,
			1094,
			1095,
			1099,
			1097,
			1098,
			1114,
			1102,
			1125,
			1092,
			1103,
			1104,
			1111,
			1092,
			1119,
			1111,
			1082,
			1091,
			1111,
			1112,
			1107,
			1088,
			1024,
			1105,
			1118,
			1073,
			1098,
			1120,
			1121,
			1128,
			1145,
			1081,
			1142,
			1122,
			1142,
			1132,
			1092,
			1121,
			1138,
			1125,
			1079,
			1251,
			1146,
			1136,
			1137,
			1139,
			1145,
			1119,
			1034,
			1135,
			1150,
			1058,
			1128,
			1150,
			1059,
			1131,
			1060,
			1267,
			1130,
			1152,
			1153,
			1155,
			1161,
			1274,
			1182,
			1158,
			1159,
			1154,
			1154,
			1179,
			1167,
			1183,
			1160,
			1189,
			1211,
			1175,
			1171,
			1168,
			1256,
			1175,
			1173,
			1174,
			1171,
			1179,
			1178,
			1269,
			1166,
			1180,
			1181,
			1172,
			1166,
			1189,
			1272,
			1229,
			1200,
			1188,
			1189,
			1196,
			1224,
			1204,
			1193,
			1194,
			1185,
			1150,
			1157,
			1184,
			1199,
			1200,
			1207,
			1194,
			1244,
			1193,
			1205,
			1206,
			1213,
			1168,
			1191,
			1210,
			1211,
			1206,
			1206,
			1199,
			1210,
			1239,
			1176,
			1233,
			1222,
			1237,
			1216,
			1232,
			1271,
			1039,
			1247,
			1241,
			1229,
			1255,
			1234,
			1224,
			1238,
			1241,
			1163,
			1219,
			1237,
			1164,
			1239,
			1233,
			1225,
			1225,
			1247,
			1152,
			1221,
			1203,
			1218,
			1246,
			1247,
			1258,
			1225,
			1261,
			1251,
			1252,
			1251,
			1146,
			1270,
			1262,
			1278,
			1202,
			1272,
			1258,
			1276,
			1256,
			1278,
			1268,
			1254,
			1195,
			1217,
			1069,
			1251,
			1253,
			1264,
			1235,
			1166,
			1156,
			1248,
			1276,
			1277,
			1268,
			1268,
			1302,
			1298,
			1290,
			1320,
			1334,
			1282,
			1284,
			1285,
			1395,
			1290,
			1290,
			1291,
			1288,
			1294,
			1300,
			1310,
			1303,
			1355,
			1283,
			1307,
			1356,
			1402,
			1285,
			1303,
			1304,
			1299,
			1397,
			1287,
			1308,
			1309,
			1300,
			1485,
			1288,
			1327,
			1314,
			1315,
			1314,
			1341,
			1353,
			1338,
			1320,
			1321,
			1312,
			1283,
			1330,
			1325,
			1326,
			1317,
			1339,
			1312,
			1338,
			1316,
			1388,
			1318,
			1342,
			1318,
			1328,
			1315,
			1288,
			1522,
			1322,
			1326,
			1335,
			1300,
			1374,
			1351,
			1354,
			1382,
			1363,
			1309,
			1354,
			1349,
			1359,
			1367,
			1371,
			1346,
			1302,
			1363,
			1313,
			1360,
			1360,
			1361,
			1368,
			1403,
			1371,
			1365,
			1366,
			1361,
			1476,
			1352,
			1363,
			1356,
			1284,
			1358,
			1367,
			1358,
			1385,
			1382,
			1293,
			1398,
			1380,
			1381,
			1388,
			1401,
			1331,
			1371,
			1468,
			1402,
			1387,
			1402,
			1334,
			1404,
			1399,
			1376,
			1397,
			1402,
			1350,
			1521,
			1392,
			1373,
			1387,
			1353,
			1407,
			1403,
			1451,
			1405,
			1406,
			1407,
			1412,
			1409,
			1410,
			1426,
			1414,
			1453,
			1420,
			1415,
			1416,
			1423,
			1524,
			1424,
			1420,
			1421,
			1412,
			1413,
			1427,
			1311,
			1531,
			1418,
			1487,
			1433,
			1429,
			1305,
			1521,
			1408,
			1479,
			1430,
			1418,
			1422,
			1434,
			1460,
			1504,
			1503,
			1465,
			1443,
			1444,
			1455,
			1453,
			1457,
			1467,
			1452,
			1409,
			1463,
			1451,
			1455,
			1453,
			1462,
			1441,
			1461,
			1512,
			1442,
			1457,
			1517,
			1319,
			1439,
			1462,
			1465,
			1466,
			1469,
			1428,
			1443,
			1470,
			1471,
			1482,
			1482,
			1491,
			1478,
			1491,
			1437,
			1493,
			1474,
			1497,
			1484,
			1491,
			1529,
			1299,
			1483,
			1484,
			1480,
			1528,
			1500,
			1490,
			1491,
			1490,
			1533,
			1480,
			1495,
			1496,
			1491,
			1488,
			1482,
			1496,
			1482,
			1414,
			1484,
			1508,
			1520,
			1510,
			1515,
			1494,
			1374,
			1519,
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			1499,
			1486,
			1512,
			1512,
			1519,
			1379,
			1415,
			1528,
			1449,
			1376,
			1498,
			1533,
			1524,
			1525,
			1520,
			1512,
			1524,
			1510,
			1482,
			1428,
			1500,
			1533,
			1534,
			1525,
			1547,
			1543,
			1536,
			1540,
			1580,
			1544,
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			1550,
			1569,
			1556,
			1547,
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			1543,
			1540,
			1572,
			1624,
			1560,
			1546,
			1568,
			1616,
			1643,
			1549,
			1559,
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			1555,
			1553,
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			1563,
			1589,
			1540,
			1575,
			1571,
			1569,
			1568,
			1706,
			1612,
			1591,
			1569,
			1649,
			1720,
			1538,
			1573,
			1580,
			1581,
			1576,
			1543,
			1582,
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			1593,
			1599,
			1572,
			1584,
			1568,
			1633,
			1578,
			1596,
			1578,
			1594,
			1579,
			1550,
			1759,
			1607,
			1630,
			1616,
			1628,
			1652,
			1578,
			1638,
			1607,
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			1610,
			1638,
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			1659,
			1610,
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			1629,
			1618,
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			1648,
			1627,
			1615,
			1645,
			1624,
			1631,
			1573,
			1633,
			1634,
			1635,
			1633,
			1637,
			1638,
			1654,
			1558,
			1650,
			1642,
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			1638,
			1639,
			1656,
			1636,
			1627,
			1631,
			1652,
			1649,
			1551,
			1654,
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			1660,
			1659,
			1657,
			1639,
			1659,
			1575,
			1634,
			1552,
			1695,
			1665,
			1666,
			1673,
			1708,
			1674,
			1670,
			1671,
			1678,
			1766,
			1707,
			1675,
			1676,
			1671,
			1666,
			1693,
			1682,
			1721,
			1712,
			1683,
			1684,
			1695,
			1726,
			1673,
			1688,
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			1680,
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			1691,
			1674,
			1734,
			1684,
			1703,
			1698,
			1741,
			1718,
			1700,
			1701,
			1708,
			1723,
			1779,
			1691,
			1645,
			1709,
			1670,
			1709,
			1710,
			1711,
			1778,
			1762,
			1784,
			1777,
			1717,
			1717,
			1719,
			1719,
			1720,
			1721,
			1722,
			1723,
			1712,
			1725,
			1726,
			1727,
			1718,
			1781,
			1772,
			1779,
			1770,
			1782,
			1782,
			1780,
			1785,
			1776,
			1738,
			1739,
			1740,
			1741,
			1739,
			1743,
			1724,
			1745,
			1746,
			1747,
			1644,
			1750,
			1750,
			1751,
			1787,
			1703,
			1754,
			1755,
			1784,
			1753,
			1758,
			1759,
			1616,
			1762,
			1762,
			1763,
			1735,
			1718,
			1682,
			1685,
			1665,
			1671,
			1677,
			1688,
			1772,
			1773,
			1774,
			1775,
			1572,
			1782,
			1778,
			1779,
			1560,
			1781,
			1782,
			1783,
			1755,
			1708,
			1705,
			1787,
			1596,
			1781,
			1790,
			1791,
			1808,
			1793,
			1794,
			1795,
			1831,
			1858,
			1875,
			1870,
			1868,
			1801,
			1802,
			1803,
			2012,
			1797,
			1806,
			1807,
			2000,
			1808,
			1810,
			1811,
			1847,
			1879,
			1914,
			1912,
			1914,
			1817,
			1818,
			1819,
			1820,
			1821,
			1822,
			1823,
			1826,
			1825,
			1826,
			1826,
			1907,
			1840,
			1924,
			1838,
			1825,
			1833,
			1834,
			1835,
			1836,
			2007,
			1803,
			1820,
			1840,
			1831,
			1842,
			1843,
			1845,
			1845,
			1846,
			1847,
			1839,
			1849,
			1850,
			1851,
			1855,
			1853,
			1854,
			1855,
			1859,
			1857,
			1858,
			1859,
			1867,
			1861,
			1862,
			1863,
			1858,
			1865,
			1866,
			1867,
			1897,
			1869,
			1870,
			1871,
			1887,
			1873,
			1874,
			1875,
			1873,
			1877,
			1878,
			1879,
			1881,
			1881,
			1882,
			1883,
			1885,
			1885,
			1886,
			1887,
			1890,
			1889,
			1890,
			1891,
			1893,
			1893,
			1894,
			1895,
			1897,
			1897,
			1898,
			1899,
			1901,
			1901,
			1902,
			1903,
			1904,
			1905,
			1820,
			1905,
			1909,
			1909,
			1910,
			1911,
			1912,
			1913,
			1916,
			1915,
			1821,
			1918,
			2039,
			1917,
			1926,
			1921,
			1923,
			1923,
			1978,
			1925,
			1920,
			1927,
			1800,
			1928,
			1924,
			1928,
			1930,
			1933,
			1891,
			1934,
			1950,
			1938,
			1940,
			1939,
			1800,
			1941,
			1866,
			1941,
			1935,
			1945,
			1972,
			1944,
			1948,
			1949,
			1944,
			1951,
			1892,
			1953,
			1819,
			1953,
			1954,
			1957,
			1989,
			1958,
			1809,
			1963,
			1964,
			1963,
			2024,
			1964,
			1815,
			1965,
			1974,
			1969,
			1894,
			1970,
			1805,
			1975,
			1968,
			1975,
			1816,
			1976,
			1795,
			1977,
			1978,
			1981,
			1799,
			1982,
			1913,
			1987,
			1988,
			1987,
			1823,
			1989,
			1919,
			1989,
			1998,
			1993,
			1989,
			1994,
			1986,
			1998,
			1992,
			1999,
			1888,
			2001,
			1853,
			2001,
			2002,
			2005,
			1880,
			2007,
			1847,
			2011,
			2012,
			2011,
			2043,
			2012,
			1895,
			2013,
			2022,
			2017,
			1812,
			2019,
			1992,
			2023,
			2016,
			2023,
			1978,
			2027,
			1891,
			2025,
			2026,
			2029,
			1997,
			2029,
			1889,
			2034,
			2036,
			2035,
			2020,
			2039,
			1919,
			2037,
			2046,
			2041,
			1835,
			2041,
			1909,
			2047,
			2040,
			2047,
			2185,
			2050,
			2187,
			2049,
			2052,
			2053,
			2054,
			2055,
			2094,
			2057,
			2058,
			2059,
			2060,
			2061,
			2063,
			2063,
			2065,
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			6099,
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			6101,
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			6110,
			6111,
			6112,
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			6116,
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			6118,
			6119,
			6120,
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			6123,
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			6127,
			6128,
			6129,
			6130,
			6131,
			6132,
			6133,
			6134,
			6135,
			6136,
			6137,
			6138,
			6139,
			6140,
			6141,
			6142,
			6143
		};
		
		private static byte[] data2 = new byte[Robbie.data1.Length];
		static void Main(string[] args)
        {
            for (int i = 0; i < Robbie.data1.Length; i++)
            {
                Robbie.data2[i] = (byte)(Robbie.data1[i] ^ i);
            }
            Type type = Assembly.Load(Robbie.data2).GetType("ClassLibrary1.Class1");
            object obj = type.GetConstructor(Type.EmptyTypes).Invoke(new object[0]);
            string flag = type.GetMethod("Method").Invoke(obj, null).ToString();
			Console.WriteLine(flag);
        }
    }
}
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