1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
|
#! /usr/bin/env python2
#-*- coding:utf-8 -*-
from builtins import range
import unittest
import logging
from miasm.analysis.machine import Machine
import miasm.os_dep.win_api_x86_32 as winapi
from miasm.os_dep.win_api_x86_32 import get_win_str_a, get_win_str_w
from miasm.core.utils import pck32
from miasm.jitter.csts import PAGE_READ, PAGE_WRITE
from miasm.core.locationdb import LocationDB
machine = Machine("x86_32")
loc_db = LocationDB()
jit = machine.jitter(loc_db)
jit.init_stack()
heap = winapi.winobjs.heap
class TestWinAPI(unittest.TestCase):
def test_DebuggingFunctions(self):
# BOOL WINAPI IsDebuggerPresent(void);
jit.push_uint32_t(0) # @return
winapi.kernel32_IsDebuggerPresent(jit)
vBool = jit.cpu.EAX
self.assertFalse(vBool)
def test_msvcrt_sprintf(self):
def alloc_str(s):
s += b"\x00"
ptr = heap.alloc(jit, len(s))
jit.vm.set_mem(ptr, s)
return ptr
fmt = alloc_str(b"'%s' %d")
str_ = alloc_str(b"coucou")
buf = heap.alloc(jit,1024)
jit.push_uint32_t(1111)
jit.push_uint32_t(str_)
jit.push_uint32_t(fmt)
jit.push_uint32_t(buf)
jit.push_uint32_t(0) # ret_ad
winapi.msvcrt_sprintf(jit)
ret = get_win_str_a(jit, buf)
self.assertEqual(ret, "'coucou' 1111")
def test_msvcrt_swprintf(self):
def alloc_str(s):
s = s.encode("utf-16le")
s += b"\x00\x00"
ptr = heap.alloc(jit, len(s))
jit.vm.set_mem(ptr, s)
return ptr
fmt = alloc_str("'%s' %d")
str_ = alloc_str("coucou")
buf = heap.alloc(jit,1024)
jit.push_uint32_t(1111)
jit.push_uint32_t(str_)
jit.push_uint32_t(fmt)
jit.push_uint32_t(buf)
jit.push_uint32_t(0) # ret_ad
winapi.msvcrt_swprintf(jit)
ret = get_win_str_w(jit, buf)
self.assertEqual(ret, u"'coucou' 1111")
def test_msvcrt_realloc(self):
jit.push_uint32_t(10)
jit.push_uint32_t(0) # ret_ad
winapi.msvcrt_malloc(jit)
ptr = jit.cpu.EAX
jit.push_uint32_t(20)
jit.push_uint32_t(ptr)
jit.push_uint32_t(0) # ret_ad
winapi.msvcrt_realloc(jit)
ptr2 = jit.cpu.EAX
self.assertNotEqual(ptr, ptr2)
self.assertEqual(heap.get_size(jit.vm,ptr2), 20)
def test_GetCurrentDirectory(self):
# DWORD WINAPI GetCurrentDirectory(size, buf)
# Test with a buffer long enough
addr = 0x80000
size = len(winapi.winobjs.cur_dir)+1
jit.vm.add_memory_page(addr, PAGE_READ | PAGE_WRITE, b"\x00" * (size), "")
jit.push_uint32_t(addr) # buf
jit.push_uint32_t(size) # size
jit.push_uint32_t(0) # @return
winapi.kernel32_GetCurrentDirectoryA(jit)
dir_ = get_win_str_a(jit, addr)
size_ret = jit.cpu.EAX
self.assertEqual(len(dir_), size_ret)
# Test with a buffer too small
jit.vm.set_mem(addr, b"\xFF"*size)
jit.push_uint32_t(addr) # buf
jit.push_uint32_t(5) # size
jit.push_uint32_t(0) # @return
winapi.kernel32_GetCurrentDirectoryA(jit)
size_ret = jit.cpu.EAX
self.assertEqual(len(dir_)+1, size_ret)
dir_short = get_win_str_a(jit, addr)
self.assertEqual(dir_short, dir_[:4])
def test_MemoryManagementFunctions(self):
# HGLOBAL WINAPI GlobalAlloc(_In_ UINT uFlags, _In_ SIZE_T dwBytes);
jit.push_uint32_t(10) # dwBytes
jit.push_uint32_t(0) # uFlags
jit.push_uint32_t(0) # @return
winapi.kernel32_GlobalAlloc(jit)
hMem = jit.cpu.EAX
self.assertTrue(hMem)
# HGLOBAL WINAPI GlobalFree(_In_ HGLOBAL hMem);
jit.push_uint32_t(hMem) # hMem
jit.push_uint32_t(0) # @return
winapi.kernel32_GlobalFree(jit)
hMem = jit.cpu.EAX
self.assertFalse(hMem)
# LPVOID WINAPI HeapAlloc(_In_ HANDLE hHeap, _In_ DWORD dwFlags, _In_ SIZE_T dwBytes);
jit.push_uint32_t(10) # dwBytes
jit.push_uint32_t(0) # dwFlags
jit.push_uint32_t(0) # hHeap
jit.push_uint32_t(0) # @return
winapi.kernel32_HeapAlloc(jit)
lpMem = jit.cpu.EAX
self.assertTrue(lpMem)
# BOOL WINAPI HeapFree(_In_ HANDLE hHeap, _In_ DWORD dwFlags, _In_ LPVOID lpMem);
jit.push_uint32_t(lpMem) # lpMem
jit.push_uint32_t(0) # dwFlags
jit.push_uint32_t(0) # hHeap
jit.push_uint32_t(0) # @return
winapi.kernel32_HeapFree(jit)
vBool = jit.cpu.EAX
self.assertTrue(vBool)
# HLOCAL WINAPI LocalAlloc(_In_ UINT uFlags, _In_ SIZE_T uBytes);
jit.push_uint32_t(10) # uBytes
jit.push_uint32_t(0) # uFlags
jit.push_uint32_t(0) # @return
winapi.kernel32_LocalAlloc(jit)
hMem = jit.cpu.EAX
self.assertTrue(hMem)
# HLOCAL WINAPI LocalFree(_In_ HLOCAL hMem);
jit.push_uint32_t(hMem) # hMem
jit.push_uint32_t(0) # @return
winapi.kernel32_LocalFree(jit)
hMem = jit.cpu.EAX
self.assertFalse(hMem)
def test_ProcessAndThreadFunctions(self):
# HANDLE WINAPI GetCurrentProcess(void);
jit.push_uint32_t(0) # @return
winapi.kernel32_GetCurrentProcess(jit)
hProc = jit.cpu.EAX
self.assertTrue(hProc)
# DWORD WINAPI GetCurrentProcessId(void);
jit.push_uint32_t(0) # @return
winapi.kernel32_GetCurrentProcessId(jit)
dwProc = jit.cpu.EAX
self.assertTrue(dwProc)
def test_SystemInformationFunctions(self):
# DWORD WINAPI GetVersion(void);
jit.push_uint32_t(0) # @return
winapi.kernel32_GetVersion(jit)
dwVer = jit.cpu.EAX
self.assertTrue(dwVer)
# BOOL WINAPI GetVersionEx(_Inout_ LPOSVERSIONINFO lpVersionInfo);
jit.vm.set_mem(jit.stack_base, pck32(0x9c))
jit.push_uint32_t(jit.stack_base) # lpVersionInfo
jit.push_uint32_t(0) # @return
winapi.kernel32_GetVersionExA(jit)
vBool = jit.cpu.EAX
self.assertTrue(vBool)
def test_TimeFunctions(self):
# DWORD WINAPI GetTickCount(void);
jit.push_uint32_t(0) # @return
winapi.kernel32_GetTickCount(jit)
dwTime = jit.cpu.EAX
self.assertTrue(dwTime)
def test_ToolHelpFunctions(self):
# HANDLE WINAPI CreateToolhelp32Snapshot(_In_ DWORD dwFlags, _In_ DWORD th32ProcessID);
jit.push_uint32_t(0) # th32ProcessID
jit.push_uint32_t(0) # dwFlags
jit.push_uint32_t(0) # @return
winapi.kernel32_CreateToolhelp32Snapshot(jit)
hSnap = jit.cpu.EAX
self.assertTrue(hSnap)
# BOOL WINAPI Process32First(_In_ HANDLE hSnapshot, _Inout_ LPPROCESSENTRY32 lppe);
jit.push_uint32_t(jit.stack_base) # lppe
jit.push_uint32_t(hSnap) # hSnapshot
jit.push_uint32_t(0) # @return
winapi.kernel32_Process32First(jit)
vBool = jit.cpu.EAX
self.assertTrue(vBool)
# BOOL WINAPI Process32Next(_In_ HANDLE hSnapshot, _Out_ LPPROCESSENTRY32 lppe);
for i in range(3, -1, -1):
jit.push_uint32_t(jit.stack_base) # lppe
jit.push_uint32_t(hSnap) # hSnapshot
jit.push_uint32_t(0) # @return
winapi.kernel32_Process32Next(jit)
vBool = jit.cpu.EAX
if i: self.assertTrue(vBool)
else: self.assertFalse(vBool)
def test_VirtualXXFunctions(self):
def call_vprotect(jitter, addr, size, protect):
jitter.push_uint32_t(0x0)
jitter.push_uint32_t(protect)
jitter.push_uint32_t(size)
jitter.push_uint32_t(addr)
jitter.push_uint32_t(0)
winapi.kernel32_VirtualProtect(jitter)
jit.push_uint32_t(0x2)
jit.push_uint32_t(0x2)
jit.push_uint32_t(0x4000)
jit.push_uint32_t(0x1000)
jit.push_uint32_t(0)
winapi.kernel32_VirtualAlloc(jit)
alloc_addr = jit.cpu.EAX
self.assertEqual(jit.vm.get_all_memory()[alloc_addr]["size"], 0x4000)
self.assertEqual(jit.vm.get_all_memory()[alloc_addr]["access"],
winapi.ACCESS_DICT[0x2])
# Full area
call_vprotect(jit, alloc_addr, 0x4000, 0x1)
self.assertEqual(jit.vm.get_all_memory()[alloc_addr]["access"],
winapi.ACCESS_DICT[0x1])
# Splits area [0--1000] [1000 -- 3000] [3000 -- 4000]
call_vprotect(jit, alloc_addr+0x1000, 0x2000, 0x40)
print(jit.vm)
for (addr, size, access) in [
(alloc_addr, 0x1000, 0x1),
(alloc_addr + 0x1000, 0x2000, 0x40),
(alloc_addr + 0x3000, 0x1000, 0x1)
]:
self.assertEqual(jit.vm.get_all_memory()[addr]["size"], size)
self.assertEqual(jit.vm.get_all_memory()[addr]["access"],
winapi.ACCESS_DICT[access])
# Protect over split areas
call_vprotect(jit, alloc_addr, 0x4000, 0x4)
for (addr, size) in [
(alloc_addr, 0x1000),
(alloc_addr + 0x1000, 0x2000),
(alloc_addr + 0x3000, 0x1000)
]:
self.assertEqual(jit.vm.get_all_memory()[addr]["size"], size)
self.assertEqual(jit.vm.get_all_memory()[addr]["access"],
winapi.ACCESS_DICT[0x4])
if __name__ == '__main__':
testsuite = unittest.TestLoader().loadTestsFromTestCase(TestWinAPI)
report = unittest.TextTestRunner(verbosity=2).run(testsuite)
exit(len(report.errors + report.failures))
|