python 查找一句话木马

#!/usr/bin/env python
# encoding: utf-8

import os,sys
import re
import hashlib
import time

rulelist = [
'(\$_(GET|POST|REQUEST)\[.{0,15}\]\s{0,10}\(\s{0,10}\$_(GET|POST|REQUEST)\[.{0,15}\]\))',
'((eval|assert)(\s|\n)*\((\s|\n)*\$_(POST|GET|REQUEST)\[.{0,15}\]\))',
'(eval(\s|\n)*\(base64_decode(\s|\n)*\((.|\n){1,200})',
'(function\_exists\s*\(\s*[\'|\"](popen|exec|proc\_open|passthru)+[\'|\"]\s*\))',
'((exec|shell\_exec|passthru)+\s*\(\s*\$\_(\w+)\[(.*)\]\s*\))',
'(\$(\w+)\s*\(\s.chr\(\d+\)\))',
'(\$(\w+)\s*\$\{(.*)\})',
'(\$(\w+)\s*\(\s*\$\_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\]\s*\))',
'(\$\_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\]\(\s*\$(.*)\))',
'(\$\_\=(.*)\$\_)',
'(\$(.*)\s*\((.*)\/e(.*)\,\s*\$\_(.*)\,(.*)\))',
'(new com\s*\(\s*[\'|\"]shell(.*)[\'|\"]\s*\))',
'(echo\s*curl\_exec\s*\(\s*\$(\w+)\s*\))',
'((fopen|fwrite|fputs|file\_put\_contents)+\s*\((.*)\$\_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\](.*)\))',
'(\(\s*\$\_FILES\[(.*)\]\[(.*)\]\s*\,\s*\$\_(GET|POST|REQUEST|FILES)+\[(.*)\]\[(.*)\]\s*\))',
'(\$\_(\w+)(.*)(eval|assert|include|require|include\_once|require\_once)+\s*\(\s*\$(\w+)\s*\))',
'((include|require|include\_once|require\_once)+\s*\(\s*[\'|\"](\w+)\.(jpg|gif|ico|bmp|png|txt|zip|rar|htm|css|js)+[\'|\"]\s*\))',
'(eval\s*\(\s*\(\s*\$\$(\w+))',
'((eval|assert|include|require|include\_once|require\_once|array\_map|array\_walk)+\s*\(\s*\$\_(GET|POST|REQUEST|COOKIE|SERVER|SESSION)+\[(.*)\]\s*\))',
'(preg\_replace\s*\((.*)\(base64\_decode\(\$)'
]

def scan(path):
print('           可疑文件         ')
print('*'*30)
for root,dirs,files in os.walk(path):
for filespath in files:
if os.path.getsize(os.path.join(root,filespath))<1024000:
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][0:200])
print ('最后修改时间:'+time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(os.path.getmtime(os.path.join(root,filespath)))))
print '\n\n'
break
def md5sum(md5_file):
m = hashlib.md5()
fp = open(md5_file)
m.update(fp.read())
return m.hexdigest()
fp.close()

if md5sum('/etc/issue') == '3e3c7c4194b12af573ab11c16990c477':
if md5sum('/usr/sbin/sshd') == 'abf7a90c36705ef679298a44af80b10b':
pass
else:
print('*'*40)
print "\033[31m sshd被修改，疑似留有后门\033[m"
print('*'*40)
time.sleep(5)
if md5sum('/etc/issue') == '6c9222ee501323045d85545853ebea55':
if md5sum('/usr/sbin/sshd') == '4bbf2b12d6b7f234fa01b23dc9822838':
pass
else:
print('*'*40)
print "\033[31m sshd被修改，疑似留有后门\033[m"
print('*'*40)
time.sleep(5)
if __name__=='__main__':

if len(sys.argv)!=2:
print '参数错误'
print "\t按恶意代码查找:"+sys.argv[0]+'目录名'
if os.path.lexists(sys.argv[1]) == False:
print "目录不存在"
exit()
print ('\n\n开始查找:'+sys.argv[1])
if len(sys.argv) ==2:
scan(sys.argv[1])
else:
exit()