-
Notifications
You must be signed in to change notification settings - Fork 52
/
Copy pathsheller.py
311 lines (258 loc) · 9.4 KB
/
sheller.py
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
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
# -*- coding: UTF-8 -*-
import struct
import zlib
import hashlib
import re
from subprocess import check_call
import argparse
import os
from xml.dom.minidom import parse
import xml.dom.minidom
import zipfile
from PIL import Image
import shutil
stApkToolPt = r'D:\Tools\ReverseTools\android\apktool_2.4.1.jar'
stShellAppPt = r'.\shellApplicationSourceCode'
staaptPt = r'D:\Android\Sdk\build-tools\29.0.3\aapt.exe'
stAndroidJarlibPt = r'D:\Android\Sdk\platforms\android-29\android.jar'
stdxJarPt = r'D:\Android\Sdk\build-tools\29.0.3\lib\dx.jar'
stApksignJarPt = r'D:\Android\Sdk\build-tools\29.0.3\lib\apksigner.jar'
stCurrentPt = os.path.abspath(__file__).replace(os.path.basename(__file__), "")
def add_srcDexToShellDex(srcDex, shellDex):
liShellDt = []
liSrcDexDt = []
liAllDt = []
#将原始DEX和壳DEX数据放在一个列表中
with open(shellDex, "rb") as f:
shellData = f.read()
liShellDt = list(struct.unpack(len(shellData)*'B', shellData))
with open(srcDex, 'rb') as f:
srcDt = f.read()
liSrcDexDt = list(struct.unpack(len(srcDt)*'B', srcDt))
liAllDt.extend(shellData)
# 加密原DEX
for i in liSrcDexDt:
liAllDt.append(i ^ 0xff)
iSrcDexLen = len(liSrcDexDt)
liSrcDexLen = intToSmalEndian(iSrcDexLen)
liSrcDexLen.reverse()
# 加密原DEX长度
for i in liSrcDexLen:
liAllDt.append(i ^ 0xff)
# 计算合成后DEX文件的checksum、signature、file_size
# 更改文件头
newFsize = len(liAllDt)
liNewFSize = intToSmalEndian(newFsize)
for i in range(4):
liAllDt[32 + i] = liNewFSize[i]
newSignature = hashlib.sha1(bytes(liAllDt[32:])).hexdigest()
liNewSignature = re.findall(r'.{2}', newSignature)
for i in range(len(liNewSignature)):
liNewSignature[i] = ord(bytes.fromhex(liNewSignature[i]))
for i in range(20):
liAllDt[12 + i] = liNewSignature[i]
newChecksum = zlib.adler32(bytes(liAllDt[12:]))
liNewChecksum = intToSmalEndian(newChecksum)
for i in range(4):
liAllDt[8 + i] = liNewChecksum[i]
with open(os.path.join(stCurrentPt, 'classes.dex'), 'wb') as f:
f.write(bytes(liAllDt))
def intToSmalEndian(numb):
liRes = []
stHexNumb = hex(numb)[2:]
for i in range(8 - len(stHexNumb)):
stHexNumb = '0' + stHexNumb
liRes = re.findall(r'.{2}', stHexNumb)
for i in range(len(liRes)):
liRes[i] = ord(bytes.fromhex(liRes[i]))
liRes.reverse()
return liRes
def decompAPK(fp):
cmd = []
cmd.append('java')
cmd.append('-jar')
cmd.append(stApkToolPt)
cmd.append('d')
cmd.append('-o')
cmd.append(fp + "decompile")
cmd.append(fp)
check_call(cmd)
def getAppName(fp):
stAppName = "android.app.Application"
stDisassembleDp = fp + "decompile"
stAMFp = os.path.join(stDisassembleDp, "AndroidManifest.xml")
oDomTree = parse(stAMFp)
manifest = oDomTree.documentElement
apps = manifest.getElementsByTagName('application')
if len(apps) != 1:
print("存在多个Application")
raise(Exception)
if apps[0].getAttribute("android:name") != "":
stAppName = apps[0].getAttribute("android:name")
return stAppName
def replaceTag(fp, stValue):
stAXMLFp = os.path.join(stCurrentPt, fp + "decompile", "AndroidManifest.xml")
dom = None
with open(stAXMLFp, 'r', encoding='UTF-8') as f:
dom = parse(f)
root = dom.documentElement
app = root.getElementsByTagName('application')[0]
app.setAttribute("android:name", stValue)
with open(stAXMLFp, "w", encoding='UTF-8') as f:
dom.writexml(f, encoding='UTF-8')
stDecompDp = os.path.join(stCurrentPt, fp + "decompile")
# 修复PNG文件BUG
PngBug(stDecompDp)
cmd = []
cmd.append('java')
cmd.append('-jar')
cmd.append(stApkToolPt)
cmd.append('b')
cmd.append('-o')
cmd.append("result.apk")
cmd.append(stDecompDp)
check_call(cmd)
shutil.rmtree(stDecompDp)
def save_appName(appName):
stCfgFp = os.path.join(stShellAppPt, "java/cn/yongye/nativeshell/common/Config.java")
with open(stCfgFp, 'w') as f:
f.write("package cn.yongye.nativeshell.common;\n")
f.write("\n")
f.write("public class Config {\n")
f.write(" public static final String MAIN_APPLICATION = \"{}\";\n".format(appName))
f.write("}")
def compileSrcApk(dp):
cmd = []
cmd.append('java')
cmd.append('-jar')
cmd.append(stApkToolPt)
cmd.append('b')
cmd.append('-f')
cmd.append('-o')
cmd.append(stCurrentPt + "\src.apk")
cmd.append(dp)
check_call(cmd)
def compileShellDex():
licmd2 = []
licmd2.append("javac")
licmd2.append("-encoding")
licmd2.append("UTF-8")
licmd2.append("-target")
licmd2.append("1.8")
licmd2.append("-bootclasspath")
licmd2.append(stAndroidJarlibPt)
licmd2.append("-d")
licmd2.append(stCurrentPt)
licmd2.append(stCurrentPt + r"\shellApplicationSourceCode\java\cn\yongye\nativeshell\*.java")
licmd2.append(stCurrentPt + r"\shellApplicationSourceCode\java\cn\yongye\nativeshell\common\*.java")
licmd2.append(stCurrentPt + r"\shellApplicationSourceCode\java\cn\yongye\nativeshell\inmemoryloaddex\*.java")
check_call(licmd2)
licmd3 = []
licmd3.append("java")
licmd3.append("-jar")
licmd3.append(stdxJarPt)
licmd3.append("--dex")
licmd3.append("--output=" + stCurrentPt + "\shell.dex")
licmd3.append(r"cn\yongye\nativeshell\*.class")
licmd3.append(r"cn\yongye\nativeshell\common\*.class")
licmd3.append(r"cn\yongye\nativeshell\inmemoryloaddex\*.class")
check_call(licmd3)
shutil.rmtree("cn")
def replaceSDexToShellDex(stSApkFp):
# 提取原APK中的DEX到本地
oFApk = zipfile.ZipFile(stSApkFp)
oFApk.extract("classes.dex", stCurrentPt)
oFApk.close()
stSDexFp = os.path.join(stCurrentPt, "classes.dex")
stShellDexFp = os.path.join(stCurrentPt, "shell.dex")
# 将原DEX添加到壳DEX尾部,保存到本目录下为classes.dex
add_srcDexToShellDex(stSDexFp, stShellDexFp)
#将修改后的壳DEX添加到原DEX中
cmd1 = []
cmd1.append(staaptPt)
cmd1.append("r")
cmd1.append(stSApkFp)
cmd1.append("classes.dex")
check_call(cmd1)
oNewApk = zipfile.ZipFile(stSApkFp, "a")
oNewApk.write("classes.dex", "classes.dex")
oNewApk.close()
os.remove(stSDexFp)
os.remove(stShellDexFp)
def signApk(fp, stKeystoreFp):
cmd = []
cmd.append("java")
cmd.append("-jar")
cmd.append(stApksignJarPt)
cmd.append("sign")
cmd.append("--ks")
cmd.append(stKeystoreFp)
cmd.append("--ks-pass")
cmd.append("pass:123456")
cmd.append(fp)
check_call(cmd)
def PngBug(decompFp):
import filetype
liFiles = os.listdir(decompFp)
for fn in liFiles:
fp = os.path.join(decompFp, fn)
if os.path.isdir(fp):
PngBug(fp)
if fp.endswith(".png") and filetype.guess(fp).MIME == "image/gif":
im = Image.open(fp)
current = im.tell()
im.save(fp)
def addLib(fp):
stLib2Fp1 = os.path.join(stCurrentPt, "lib", "libdalvik_system_DexFile.so")
stLib2Fp2 = os.path.join(stCurrentPt, "lib", "libyongyejiagu.so")
apk = zipfile.ZipFile(fp, "a")
apk.write(stLib2Fp1, "lib/x86/libdalvik_system_DexFile.so")
apk.write(stLib2Fp2, "lib/x86/libyongyejiagu.so")
apk.close()
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument('-f', help="对指定文件进行加固", nargs=1, metavar='APK')
args = parser.parse_args()
if args.f:
fp = args.__dict__.get('f')[0]
"""
1. 第一步:确定加密算法
"""
inKey = 0xFF
print("[*] 确定加密解密算法,异或: {}".format(str(inKey)))
"""
2. 第二步:准备好壳App
"""
# 反编译原apk
decompAPK(fp)
# print("[*] 反编译原的apk文件{}完成".format(fp))
# 获取Applicaiton name并保存到壳App源码中
stSrcDexAppName = getAppName(fp)
# print("[*] 获取原apk文件的Application Android:name=\"{}\" 完成".format(stSrcDexAppName))
save_appName(stSrcDexAppName)
# print("[*] 保存原apk文件的Application Android:name=\"{}\" 到壳App源码的配置文件完成".format(stSrcDexAppName))
# 编译出壳DEX
compileShellDex()
print("[*] 壳App的class字节码文件编译为:shell.dex完成")
"""
3. 第三步:修改原apk AndroidManifest.xml文件中的Application name字段为壳的Application name字段
"""
# 替换壳Applicaiton name到原apk的AndroidManifest.xml内
replaceTag(fp, "cn.yongye.nativeshell.StubApp")
print("[*] 原apk文件AndroidManifest.xml中application的name字段替换为壳application name字段完成")
"""
4. 替换原apk中的DEX文件为壳DEX
"""
replaceSDexToShellDex(os.path.join(stCurrentPt, "result.apk"))
print("[*] 壳DEX替换原apk包内的DEX文件完成")
"""
5. 添加脱壳lib库到原apk中
"""
addLib("result.apk")
"""
6. apk签名
"""
signApk(os.path.join(stCurrentPt, "result.apk"), os.path.join(stCurrentPt, "demo.keystore"))
print("[*] 签名完成,生成apk文件: {}".format(os.path.join(stCurrentPt, "result.apk")))
else:
parser.print_help()