ILprotector 22.15壳的脱法研究

zhj777

手里有一.net程序，加的是ILprotector的混淆，用de4dot干不掉，找了专用脱壳机也不行，于是在网上搜了一下相应资料，找到了wwh1004大牛的 [.NET]详解ILProtector并写出脱壳机 https://www.52pojie.cn/thread-824381-1-1.html，但由于水平有限，未能实现脱壳，但已导出检测hook 涵数的伪代码，通过对比感觉和ILprotector22.15的相似，希望看到本贴的大牛对如何脱掉此壳指点一二，也欢迎更多的高手尝试脱壳。程序地址https://pan.baidu.com/s/1vpzg-3iz-yKnsTfvQmWt-A
提取码：ie65
下面是v22.15检测hook涵数伪码（不知找的对不对哈）

[C++] 纯文本查看 复制代码

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001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386

char __fastcall sub_1002BCA0(int a1, int a2, int a3, int *a4, int a5, char a6, LONG a7, LONG **a8, int a9, int a10){   int v10; // edi@1   int v11; // edi@6   SAFEARRAY *v12; // edi@10   int v13; // eax@10   HRESULT v14; // edi@12   int v15; // edi@13   int v16; // eax@13   int v17; // eax@17   int v18; // edx@18   char v19; // al@21   int *v20; // edx@30   int v21; // edi@32   int v22; // edi@32   int *v23; // ecx@33   int v24; // edx@35   LONG *v25; // eax@37   int v26; // edi@40   char v27; // al@47   int v28; // esi@51   SAFEARRAY *v29; // eax@51   void (__stdcall *v30)(VARIANTARG *); // edi@51   int v31; // eax@52   int v32; // esi@57   SAFEARRAY *v33; // eax@57   int v34; // edx@57   int v35; // edi@58   int (__stdcall *v36)(LONG, _DWORD); // esi@58   int v37; // eax@58   LONG **v38; // ecx@58   int v39; // eax@58   int v40; // eax@62   int v41; // ecx@64   int v42; // edx@64   _DWORD *v43; // eax@64   int v44; // esi@65   int v45; // eax@67   char v47; // [sp-20h] [bp-F0h]@21   int v48; // [sp-1Ch] [bp-ECh]@21   int v49; // [sp-18h] [bp-E8h]@21   int v50; // [sp-14h] [bp-E4h]@21   int v51; // [sp-10h] [bp-E0h]@21   int v52; // [sp-Ch] [bp-DCh]@21   int v53; // [sp-8h] [bp-D8h]@21   VARIANTARG *v54; // [sp-4h] [bp-D4h]@21   VARIANTARG v55; // [sp+10h] [bp-C0h]@1   VARIANTARG v56; // [sp+20h] [bp-B0h]@51   int v57; // [sp+30h] [bp-A0h]@19   SAFEARRAY *psa; // [sp+34h] [bp-9Ch]@10   int v59; // [sp+38h] [bp-98h]@1   int v60; // [sp+3Ch] [bp-94h]@1   int v61; // [sp+40h] [bp-90h]@1   int v62; // [sp+44h] [bp-8Ch]@1   int v63; // [sp+48h] [bp-88h]@1   LONG **v64; // [sp+4Ch] [bp-84h]@1   VARIANTARG pvarg; // [sp+50h] [bp-80h]@1   int v66; // [sp+64h] [bp-6Ch]@1   int (__stdcall *v67)(int, int, int, VARIANTARG *); // [sp+68h] [bp-68h]@1   LONG v68; // [sp+6Ch] [bp-64h]@1   int pv; // [sp+70h] [bp-60h]@10   int v70; // [sp+74h] [bp-5Ch]@32   SAFEARRAY *v71; // [sp+78h] [bp-58h]@10   VARIANTARG *v72; // [sp+7Ch] [bp-54h]@30   int *v73; // [sp+80h] [bp-50h]@21   int v74; // [sp+84h] [bp-4Ch]@1   int v75; // [sp+88h] [bp-48h]@1   LONG rgIndices; // [sp+8Ch] [bp-44h]@1   int v77; // [sp+90h] [bp-40h]@1   int v78; // [sp+94h] [bp-3Ch]@1   char v79; // [sp+9Bh] [bp-35h]@1   int v80; // [sp+9Ch] [bp-34h]@1   int v81; // [sp+A0h] [bp-30h]@21   int *v82; // [sp+A4h] [bp-2Ch]@21   VARIANTARG *v83; // [sp+A8h] [bp-28h]@21   VARIANTARG *v84; // [sp+ACh] [bp-24h]@21   VARIANTARG v85; // [sp+B0h] [bp-20h]@21   int v86; // [sp+CCh] [bp-4h]@1     v80 = a3;   v63 = a1;   v66 = a2;   v64 = a8;   v74 = a9;   v75 = a10;   v79 = 0;   rgIndices = 0;   v77 = 0;   v86 = 0;   v78 = 0;   v62 = 0;   v60 = 0;   v67 = 0;   v61 = 0;   v59 = 0;   v68 = 0;   VariantInit(&pvarg);   VariantInit(&v55);   LOBYTE(v86) = 3;   v10 = *(_DWORD *)v63;   if ( !*(_DWORD *)v63 )     sub_1007C060(-2147467261);   if ( v77 )     (*(void (__stdcall **)(int))(*(_DWORD *)v77 + 8))(v77);   v77 = 0;   if ( (*(int (__stdcall **)(int, int *))(*(_DWORD *)v10 + 72))(v10, &v77) >= 0 )   {     v11 = *(_DWORD *)v66;     if ( !*(_DWORD *)v66 )       goto LABEL_80;     if ( v78 )       (*(void (__stdcall **)(int))(*(_DWORD *)v78 + 8))(v78);     v78 = 0;     if ( (*(int (__stdcall **)(int, int *))(*(_DWORD *)v11 + 72))(v11, &v78) >= 0 )     { LABEL_80:       v12 = SafeArrayCreateVector(0xCu, 0, 1u);       v13 = *a4;       psa = v12;       rgIndices = 0;       LOWORD(pv) = 9;       v71 = (SAFEARRAY *)v13;       if ( v13 )         (*(void (__stdcall **)(int))(*(_DWORD *)v13 + 4))(v13);       v14 = SafeArrayPutElement(v12, &rgIndices, &pv);       VariantClear((VARIANTARG *)&pv);       if ( v14 < 0 )         goto LABEL_71;       v15 = v80;       v16 = *(_DWORD *)(*(_DWORD *)(v80 + 56) + 156);       if ( !v16 )         sub_1007C060(-2147467261);       if ( (*(int (__stdcall **)(int, SAFEARRAY *, VARIANTARG *))(*(_DWORD *)v16 + 156))(v16, psa, &pvarg) < 0 )         goto LABEL_71;       if ( (pvarg.vt & 0xFFF) != 13 )         goto LABEL_71;       v17 = *(_DWORD *)(a7 + 100);       if ( !(v17 & 1) )         goto LABEL_71;       v18 = *(_DWORD *)(v15 + 56);       if ( *(_BYTE *)(v18 + 8) )       {         v57 = a5;         if ( !(a6 & 2) || v17 & 2 )         {           v82 = &v57;           v83 = &pvarg;           v84 = &v55;           *(_DWORD *)&v85.vt = &v77;           *(_QWORD *)&v85.decVal.Hi32 = __PAIR__(&v78, v74);           v81 = v15;           v85.cyVal.Hi = v75;           qmemcpy(&v47, &v81, 0x20u);           sub_1002DA60(&v83, v47, v48, v49, v50, v51, v52, v53, v54);           LOBYTE(v86) = 4;           v73 = &v49;           sub_100254A0();           v19 = sub_1002CC70(v49, v50, v51, v52, v53, v54);           LOBYTE(v86) = 3;           if ( !v19 )           {             sub_10012D00();             goto LABEL_71;           }           sub_10012D00();           v15 = v80; LABEL_30:           LOWORD(pv) = 20;           v71 = (SAFEARRAY *)(a7 ^ 0x4B4F4F4C);           v72 = (VARIANTARG *)(((unsigned __int64)a7 >> 32) ^ 0x45524548);           LOBYTE(v86) = 5;           v20 = *(int **)(*(_DWORD *)(v15 + 56) + 148);           if ( !v20 )             sub_1007C060(-2147467261);           v21 = *v20;           v51 = pv;           v52 = v70;           v53 = (int)v71;           v54 = v72;           *(_DWORD *)&v47 = *(_DWORD *)&pvarg.vt;           *(_QWORD *)&v48 = *(_QWORD *)&pvarg.decVal.Hi32;           v22 = (*(int (__stdcall **)(int *, _DWORD, ULONG, LONG, __int32, int, int, SAFEARRAY *, VARIANTARG *))(v21 + 100))(                   v20,                   *(_DWORD *)&pvarg.vt,                   pvarg.decVal.Hi32,                   pvarg.lVal,                   pvarg.cyVal.Hi,                   pv,                   v70,                   v71,                   v72);           LOBYTE(v86) = 3;           VariantClear((VARIANTARG *)&pv);           if ( v22 >= 0 )           {             v23 = *(int **)(*(_DWORD *)(v80 + 56) + 152);             if ( !v23 )               sub_1007C060(-2147467261);             v24 = *v23;             *(VARIANTARG *)&v51 = v55;             *(VARIANTARG *)&v47 = pvarg;             if ( (*(int (__stdcall **)(int *, _DWORD, ULONG, LONG, __int32, _DWORD, ULONG, LONG, __int32))(v24 + 100))(                    v23,                    *(_DWORD *)&pvarg.vt,                    pvarg.decVal.Hi32,                    pvarg.lVal,                    pvarg.cyVal.Hi,                    *(_DWORD *)&v55.vt,                    v55.decVal.Hi32,                    v55.lVal,                    v55.cyVal.Hi) >= 0               && *(_BYTE *)(a7 + 100) & 1 )             {               v25 = (LONG *)operator new(0xCu);               if ( v25 )               {                 *v25 = pvarg.lVal;                 v25[1] = a7;                 v25[2] = 0;               }               else               {                 v25 = 0;               }               v26 = v80;               *v64 = v25;               if ( (unsigned __int8)sub_1002C4F0(v25) )               {                 if ( (!*(_DWORD *)v63 || (unsigned __int8)sub_100240C0(v26, v63, (int)&v62))                   && (!*(_DWORD *)v66 || (unsigned __int8)sub_100240C0(v26, v66, (int)&v60))                   && (unsigned __int8)sub_100242A0(v26, *(_DWORD *)(v26 + 56) + 28, *(_DWORD *)(v26 + 52) + 192, &v67)                   && (unsigned __int8)sub_1002CFB0(v26, *(_DWORD *)(v26 + 56) + 32, (int)&v61) )                 {                   v83 = (VARIANTARG *)off_1009091C;                   v84 = (VARIANTARG *)v26;                   *(_DWORD *)&v85.vt = &v59;                   v85.lVal = (LONG)&v83;                   LOBYTE(v86) = 6;                   v73 = &v49;                   sub_100254A0();                   v27 = sub_100238D0(v49, v50, v51, v52, v53, v54);                   LOBYTE(v86) = 3;                   if ( v27 )                   {                     sub_10012D00();                     if ( *(_DWORD *)v63 && (*(_WORD *)v74 & 0xFFF) == 13 )                     {                       v73 = &v51;                       v68 = -1;                       sub_1001C380(v74);                       v28 = v67(v51, v52, v53, v54);                       VariantInit((VARIANTARG *)&pv);                       VariantInit(&v85);                       LOBYTE(v86) = 8;                       LOWORD(pv) = 8204;                       v29 = SafeArrayCreateVector(0xCu, 0, 1u);                       v56.vt = 22;                       v71 = v29;                       rgIndices = 0;                       v56.lVal = -1;                       SafeArrayPutElement(v29, &rgIndices, &v56);                       v30 = (void (__stdcall *)(VARIANTARG *))VariantClear;                       VariantClear(&v56);                       sub_10025210(v80, &pv, (int)&v85);                       *(_DWORD *)(a7 + 56) = *(_DWORD *)v28;                       *(_DWORD *)(a7 + 60) = *(_DWORD *)(v28 + 4);                       if ( (*(_BYTE *)v28 ^ 0x80) == 105 )                       {                         v31 = *(_DWORD *)(v28 + 1) + ((*(_BYTE *)v28 ^ 0xFC) & 0xF);                         *(_DWORD *)(a7 + 92) = *(_DWORD *)(v31 + v28);                         *(_DWORD *)(a7 + 96) = *(_DWORD *)(v31 + v28 + 4);                       }                       VariantClear(&v85);                       LOBYTE(v86) = 3;                       VariantClear((VARIANTARG *)&pv);                     }                     else                     {                       v30 = (void (__stdcall *)(VARIANTARG *))VariantClear;                     }                     if ( *(_DWORD *)v66 && (*(_WORD *)v75 & 0xFFF) == 13 )                     {                       --v68;                       v73 = &v51;                       sub_1001C380(v75);                       v32 = v67(v51, v52, v53, v54);                       VariantInit((VARIANTARG *)&pv);                       VariantInit(&v85);                       LOBYTE(v86) = 10;                       LOWORD(pv) = 8204;                       v33 = SafeArrayCreateVector(0xCu, 0, 1u);                       v56.vt = 22;                       v56.lVal = v68;                       v71 = v33;                       rgIndices = 0;                       SafeArrayPutElement(v33, &rgIndices, &v56);                       v30(&v56);                       sub_10025210(v80, &pv, (int)&v85);                       *(_DWORD *)(a7 + 64) = *(_DWORD *)v32;                       v34 = *(_DWORD *)(v32 + 4);                       v54 = &v85;                       *(_DWORD *)(a7 + 68) = v34;                       v30(v54);                       LOBYTE(v86) = 3;                       v30((VARIANTARG *)&pv);                     }                     v35 = v80;                     v36 = *(int (__stdcall **)(LONG, _DWORD))(*(_DWORD *)(v80 + 56) + 316);                     v37 = v36(**v64, *(_DWORD *)(*(_DWORD *)(v80 + 52) + 316));                     *(_DWORD *)(a7 + 84) = *(_DWORD *)v37;                     v38 = v64;                     *(_DWORD *)(a7 + 88) = *(_DWORD *)(v37 + 4);                     v39 = v36(**v38, *(_DWORD *)(*(_DWORD *)(v35 + 52) + 240));                     *(_DWORD *)(a7 + 80) = v39;                     if ( (*(_BYTE *)v39 ^ 0x11) == 68                       && (*(_BYTE *)(v39 + 1) ^ 0x72) == -7                       && (*(_BYTE *)(v39 + 2) ^ 0x61) == -115 )                     {                       v54 = (VARIANTARG *)16;                       *(_DWORD *)(a7 + 36) = v67;                       v73 = (int *)operator new((size_t)v54);                       LOBYTE(v86) = 11;                       if ( v73 )                         v40 = sub_1001C380(v74);                       else                         v40 = 0;                       LOBYTE(v86) = 3;                       v41 = v61;                       v42 = v59;                       *(_DWORD *)(a7 + 48) = v40;                       *(_DWORD *)(a7 + 40) = v62;                       v43 = (_DWORD *)v66;                       *(_DWORD *)(a7 + 72) = v41;                       *(_DWORD *)(a7 + 76) = v42;                       if ( *v43 )                       {                         v44 = v75;                         if ( (*(_WORD *)v75 & 0xFFF) == 13 )                         {                           v73 = (int *)operator new(0x10u);                           LOBYTE(v86) = 12;                           if ( v73 )                             v45 = sub_1001C380(v44);                           else                             v45 = 0;                           *(_DWORD *)(a7 + 52) = v45;                           *(_DWORD *)(a7 + 44) = v60;                         }                       }                       v79 = 1;                     }                   }                   else                   {                     sub_10012D00();                   }                 }               }             }           }           goto LABEL_71;         }       }       else if ( (!(a6 & 2) || v17 & 2)              && (unsigned __int8)sub_10026870(v15, *(_DWORD *)(v15 + 56) + 12, &pvarg, v18 + 196, (int)&v55)              && (unsigned __int8)sub_10026870(v15, (int)&v77, &pvarg, *(_DWORD *)(v15 + 56) + 200, v74)              && (!v78 || (unsigned __int8)sub_10026870(v15, (int)&v78, &pvarg, *(_DWORD *)(v15 + 56) + 208, v75)) )       {         goto LABEL_30;       } LABEL_71:       if ( psa )         SafeArrayDestroy(psa);       goto LABEL_73;     }   } LABEL_73:   VariantClear(&v55);   VariantClear(&pvarg);   LOBYTE(v86) = 0;   if ( v78 )     (*(void (__stdcall **)(int))(*(_DWORD *)v78 + 8))(v78);   v86 = -1;   if ( v77 )     (*(void (__stdcall **)(int))(*(_DWORD *)v77 + 8))(v77);   return v79; }

zhj777

SoftCracker 发表于 2024-9-7 21:39
> 只不过样本我用的是22.15保护的

这个程序不是你加的壳吧？（https://pan.baidu.com/s/1vpzg-3iz-yKnsT ...

这个样本是我加的，因为我这有个程序不方便上传，通过对比发现加的混淆和22.15的差不多，所以就传了这个样本。大牛有思路去掉此混淆还请指导一下，如果能出个教程那再好不过了。

zhj777

SoftCracker 发表于 2024-9-5 00:57
跟以前一样啊，我还以为ILProtector更新了呢

更新了，最新的是22.17吧，只不过样本我用的是22.15保护的。不知大牛能不能去掉混淆？如果能的话那能不能麻烦您请指点一下如何去掉混淆。

zhj777

看来和wwh1004大牛类似的高手们都没空研究这壳了！

SoftCracker

跟以前一样啊，我还以为ILProtector更新了呢

SoftCracker

> 只不过样本我用的是22.15保护的

这个程序不是你加的壳吧？（https://pan.baidu.com/s/1vpzg-3iz-yKnsTfvQmWt-A）

zhj777

SoftCracker 发表于 2024-9-5 00:57
跟以前一样啊，我还以为ILProtector更新了呢

看到您已经去掉混淆，能不能麻烦您指导一下如何去掉混淆？

go2crack

确实还是老样子啊。

zhj777

go2crack 发表于 2024-9-15 00:22
确实还是老样子啊。

最新22.17了

zhj777

go2crack 发表于 2024-9-15 00:22
确实还是老样子啊。

最新是22.17，自己已解决。