本文讲述了一个python查找 webshell脚本的代码，除了查找webshell功能之外还具有白名单功能，以及发现恶意代码发送邮件报警等功能，感兴趣的朋友可以自己测试一下看看效果。
具体的功能代码如下：
#!/usr/bin/env python
#-*- coding: utf-8 -*-
import os
import sys
import re
import smtplib
#设定邮件
fromaddr = “smtp.qq.com”
toaddrs = [“voilet@qq.com”]
username = “voilet”
password = “xxxxxx”
#设置白名单
pass_file = [“api_ucenter.php”]
#定义发送邮件函数
def sendmail(toaddrs,sub,content):
‘发送邮件模块’
# add the from: and to: headers at the start!
msg = (“from: %s\r\nto: %s\r\nsubject: %s\r\n\r\n”
% (fromaddr, “, “.join(toaddrs), sub))
msg += content
server = smtplib.smtp(‘mail.funshion.com’, 25,)
server.login(username, password)
server.sendmail(fromaddr, toaddrs, msg)
server.quit()
#设置搜索特征码
rulelist = [
‘(\$_(get|post|request)\[.{0,15}\]\(\$_(get|post|request)\[.{0,15}\]\))’,
‘(base64_decode\([\'”][\w\+/=]{200,}[\'”]\))’,
‘eval\(base64_decode\(‘,
‘(eval\(\$_(post|get|request)\[.{0,15}\]\))’,
‘(assert\(\$_(post|get|request)\[.{0,15}\]\))’,
‘(\$[\w_]{0,15}\(\$_(post|get|request)\[.{0,15}\]\))’,
‘(wscript\.shell)’,
‘(gethostbyname\()’,
‘(cmd\.exe)’,
‘(shell\.application)’,
‘(documents\s+and\s+settings)’,
‘(system32)’,
‘(serv-u)’,
‘(提权)’,
‘(phpspy)’,
‘(后门)’,
‘(webshell)’,
‘(program\s+files)’,
‘www.phpdp.com’,
‘phpdp’,
‘php神盾’,
‘decryption’,
‘ca3tie1’,
‘gif89a’,
‘ikfbiluvm0vcjd\/apdolojtw0tgekawa’,
‘\’e\’\.\’v\’\.\’a\’\.\’l\”,
]
def scan(path):
for root,dirs,files in os.walk(path):
for filespath in files:
isover = false
if ‘.’ in filespath:
ext = filespath[(filespath.rindex(‘.’)+1):]
if ext==’php’ and filespath not in pass_file:
file= open(os.path.join(root,filespath))
filestr = file.read()
file.close()
for rule in rulelist:
result = re.compile(rule).findall(filestr)
if result:
print ‘文件：’+os.path.join(root,filespath)
print ‘恶意代码：’+str(result[0])
print ‘\n\n’
sendmail(toaddrs,”增值发现恶意代码”,’文件：’+os.path.join(root,filespath)+”\n” + ‘恶意代码：’+str(result[0]))
break
try:
if os.path.lexists(“/home/web_root/”):
print(‘\n\n开始扫描：’+ “/home/web_root/”)
print(‘ 可疑文件 ‘)
print(‘########################################’)
scan(“/home/web_root/”)
print(‘提示：扫描完成–~’)
else:
print ‘提示：指定的扫描目录不存在— ‘
except indexerror:
print “请指定扫描文件目录”