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Update README.md

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2.0
_xeroxz 4 years ago
parent 8897981acf
commit e5ea9810c1
1 changed files with 47 additions and 4 deletions
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README.md
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@ -534,10 +534,53 @@ extern "C" void* PiDDBCacheTable;
These two symbols are simply printed out via DbgPrint.
```cpp
// non-exported symbols being resolved by jit linker...
DbgPrint("> PiDDBCacheTable = 0x%p\n", &PiDDBCacheTable);
DbgPrint("> win32kfull!NtUserRegisterShellPTPListener = 0x%p\n", &NtUserRegisterShellPTPListener);
``
MutateRoutine extern "C" void DrvEntry()
{
DbgPrint("> Hello World!\n");
// non-exported symbols being resolved by jit linker...
DbgPrint("> PiDDBCacheTable = 0x%p\n", &PiDDBCacheTable);
DbgPrint("> win32kfull!NtUserRegisterShellPTPListener = 0x%p\n", &NtUserRegisterShellPTPListener);
// example of referencing itself...
DbgPrint("> DrvEntry = 0x%p\n", &DrvEntry);
// example of calling other obfuscated/non obfuscated routines...
PrintCR3();
LoopDemo();
}
```
Once compiled the assembly will look like this. Note that each reference to symbols is done via a relocation to an absolute address. This means strings can (and will) be mapped into their own allocation of memory.
```
0X0A8: public DrvEntry
0X0A8: DrvEntry proc near
0X0A8: 48 83 EC 28 sub rsp, 28h
0X0AC: 48 B9 78 01 00 00 00 00 00 00 mov rcx, offset ??_C@_0BA@LBLNBFIC@?$D...; "> Hello World!\n"
0X0B6: 48 B8 38 02 00 00 00 00 00 00 mov rax, offset DbgPrint
0X0C0: FF D0 call rax ; DbgPrint
0X0C2: 48 B9 88 01 00 00 00 00 00 00 mov rcx, offset ??_C@_0BK@PLIIADON...; "> PiDDBCacheTable = 0x%p\n"
0X0CC: 48 BA 40 02 00 00 00 00 00 00 mov rdx, offset PiDDBCacheTable
0X0D6: 48 B8 38 02 00 00 00 00 00 00 mov rax, offset DbgPrint
0X0E0: FF D0 call rax ; DbgPrint
0X0E2: 48 B9 A8 01 00 00 00 00 00 00 mov rcx, offset ??_C@_0DE@FLODGMCP...; "> win32kfull!NtUserRegisterShellPTPList"...
0X0EC: 48 BA 48 02 00 00 00 00 00 00 mov rdx, offset NtUserRegisterShellPTPListener
0X0F6: 48 B8 38 02 00 00 00 00 00 00 mov rax, offset DbgPrint
0X100: FF D0 call rax ; DbgPrint
0X102: 48 B9 E0 01 00 00 00 00 00 00 mov rcx, offset ??_C@_0BD@JGN... ; "> DrvEntry = 0x%p\n"
0X10C: 48 BA A8 00 00 00 00 00 00 00 mov rdx, offset DrvEntry
0X116: 48 B8 38 02 00 00 00 00 00 00 mov rax, offset DbgPrint
0X120: FF D0 call rax ; DbgPrint
0X122: 48 B8 00 00 00 00 00 00 00 00 mov rax, offset ?PrintCR3@@YAXXZ ; PrintCR3(void)
0X12C: FF D0 call rax ; PrintCR3(void) ; PrintCR3(void)
0X12E: 48 B8 58 00 00 00 00 00 00 00 mov rax, offset ?LoopDemo@@YAXXZ ; LoopDemo(void)
0X138: FF D0 call rax ; LoopDemo(void) ; LoopDemo(void)
0X13A: 90 nop
0X13B: 48 83 C4 28 add rsp, 28h
0X13F: C3 retn
0X13F: DrvEntry endp
```
### Usermode Example

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