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examples/shellcode_run.py: skip the Windows stages when system DLLs are absent #1630

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examples/shellcode_run.py: skip the Windows stages when system DLLs are absent #1630

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27 changes: 23 additions & 4 deletions examples/shellcode_run.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,23 @@
# Cross Platform and Multi Architecture Advanced Binary Emulation Framework
#

import os
import sys

sys.path.append("..")
from qiling import Qiling
from qiling.const import QL_ARCH, QL_OS, QL_VERBOSE


def windows_rootfs_ready(rootfs: str) -> bool:
# The Windows examples need genuine Windows system DLLs, which cannot be
# redistributed and are therefore not shipped with Qiling. They must be
# collected from a licensed Windows host using the helper script at
# examples/scripts/dllscollector.bat. Probe for ntdll.dll so we can skip
# these stages with a helpful message instead of crashing on an unmapped
# read when the DLLs are absent.
return os.path.isfile(os.path.join(rootfs, 'Windows', 'System32', 'ntdll.dll'))

X86_LIN = bytes.fromhex('31c050682f2f7368682f62696e89e3505389e1b00bcd80')
X8664_LIN = bytes.fromhex('31c048bbd19d9691d08c97ff48f7db53545f995257545eb03b0f05')

Expand Down Expand Up @@ -87,12 +98,20 @@
ql.run()

print("\nWindows x86 Shellcode")
ql = Qiling(code=X86_WIN, archtype=QL_ARCH.X86, ostype=QL_OS.WINDOWS, rootfs=r'rootfs/x86_windows')
ql.run()
if windows_rootfs_ready(r'rootfs/x86_windows'):
ql = Qiling(code=X86_WIN, archtype=QL_ARCH.X86, ostype=QL_OS.WINDOWS, rootfs=r'rootfs/x86_windows')
ql.run()
else:
print(" [skipped] Windows system DLLs not found under rootfs/x86_windows/Windows/System32.")
print(" Collect them from a licensed Windows host with examples/scripts/dllscollector.bat.")

print("\nWindows x86-64 Shellcode")
ql = Qiling(code=X8664_WIN, archtype=QL_ARCH.X8664, ostype=QL_OS.WINDOWS, rootfs=r'rootfs/x8664_windows')
ql.run()
if windows_rootfs_ready(r'rootfs/x8664_windows'):
ql = Qiling(code=X8664_WIN, archtype=QL_ARCH.X8664, ostype=QL_OS.WINDOWS, rootfs=r'rootfs/x8664_windows')
ql.run()
else:
print(" [skipped] Windows system DLLs not found under rootfs/x8664_windows/Windows/System32.")
print(" Collect them from a licensed Windows host with examples/scripts/dllscollector.bat.")

# FIXME: freebsd sockets are currently broken.
#
Expand Down
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