diff --git a/pywxdump/wx_info/ctypes_utils.py b/pywxdump/wx_info/ctypes_utils.py
index f2371e5..0779f1a 100644
--- a/pywxdump/wx_info/ctypes_utils.py
+++ b/pywxdump/wx_info/ctypes_utils.py
@@ -44,6 +44,24 @@ class PROCESSENTRY32(ctypes.Structure):
                 ("szExeFile", ctypes.c_char * MAX_PATH)]
 
 
+class VS_FIXEDFILEINFO(ctypes.Structure):
+    _fields_ = [
+        ('dwSignature', ctypes.wintypes.DWORD),
+        ('dwStrucVersion', ctypes.wintypes.DWORD),
+        ('dwFileVersionMS', ctypes.wintypes.DWORD),
+        ('dwFileVersionLS', ctypes.wintypes.DWORD),
+        ('dwProductVersionMS', ctypes.wintypes.DWORD),
+        ('dwProductVersionLS', ctypes.wintypes.DWORD),
+        ('dwFileFlagsMask', ctypes.wintypes.DWORD),
+        ('dwFileFlags', ctypes.wintypes.DWORD),
+        ('dwFileOS', ctypes.wintypes.DWORD),
+        ('dwFileType', ctypes.wintypes.DWORD),
+        ('dwFileSubtype', ctypes.wintypes.DWORD),
+        ('dwFileDateMS', ctypes.wintypes.DWORD),
+        ('dwFileDateLS', ctypes.wintypes.DWORD),
+    ]
+
+
 # 加载dll
 kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)
 psapi = ctypes.WinDLL('psapi', use_last_error=True)
@@ -214,24 +232,6 @@ def get_file_version_info(file_path):
     return f"{version[0]}.{version[1]}.{version[2]}.{version[3]}"
 
 
-class VS_FIXEDFILEINFO(ctypes.Structure):
-    _fields_ = [
-        ('dwSignature', ctypes.wintypes.DWORD),
-        ('dwStrucVersion', ctypes.wintypes.DWORD),
-        ('dwFileVersionMS', ctypes.wintypes.DWORD),
-        ('dwFileVersionLS', ctypes.wintypes.DWORD),
-        ('dwProductVersionMS', ctypes.wintypes.DWORD),
-        ('dwProductVersionLS', ctypes.wintypes.DWORD),
-        ('dwFileFlagsMask', ctypes.wintypes.DWORD),
-        ('dwFileFlags', ctypes.wintypes.DWORD),
-        ('dwFileOS', ctypes.wintypes.DWORD),
-        ('dwFileType', ctypes.wintypes.DWORD),
-        ('dwFileSubtype', ctypes.wintypes.DWORD),
-        ('dwFileDateMS', ctypes.wintypes.DWORD),
-        ('dwFileDateLS', ctypes.wintypes.DWORD),
-    ]
-
-
 def get_process_list():
     h_process_snap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
     if h_process_snap == ctypes.wintypes.HANDLE(-1).value:
@@ -257,8 +257,6 @@ def get_process_list():
     return process_list
 
 
-bias_list = []
-
 if __name__ == "__main__":
     processes = get_process_list()
     for pid, name in processes:
diff --git a/pywxdump/wx_info/get_wx_info.py b/pywxdump/wx_info/get_wx_info.py
index 497c59a..d00a0b3 100644
--- a/pywxdump/wx_info/get_wx_info.py
+++ b/pywxdump/wx_info/get_wx_info.py
@@ -11,7 +11,7 @@ import os
 import re
 import winreg
 from typing import List, Union
-from .utils import pattern_scan_all, verify_key, get_exe_version, get_exe_bit, info_error
+from .utils import  verify_key, get_exe_version, get_exe_bit, info_error
 from .ctypes_utils import get_process_list, get_info_with_key, get_memory_maps, get_process_exe_path, \
     get_file_version_info
 from .memory_search import search_memory
diff --git a/pywxdump/wx_info/memory_search.py b/pywxdump/wx_info/memory_search.py
index 4d65736..e39a583 100644
--- a/pywxdump/wx_info/memory_search.py
+++ b/pywxdump/wx_info/memory_search.py
@@ -1,7 +1,6 @@
 import ctypes
 import ctypes.wintypes as wintypes
 import logging
-from ctypes.wintypes import HANDLE
 import re
 import sys
 
diff --git a/pywxdump/wx_info/utils.py b/pywxdump/wx_info/utils.py
index d5a1eee..f696280 100644
--- a/pywxdump/wx_info/utils.py
+++ b/pywxdump/wx_info/utils.py
@@ -7,11 +7,8 @@
 # -------------------------------------------------------------------------------
 import os
 import re
-import sys
 import hmac
 import traceback
-
-import pymem
 import hashlib
 from win32com.client import Dispatch
 
@@ -22,7 +19,6 @@ def info_error(func):
     :param func:
     :return:
     """
-
     def wrapper(*args, **kwargs):
         try:
             return func(*args, **kwargs)
@@ -31,7 +27,6 @@ def info_error(func):
             rdata = f"{traceback_data}"
             print(f"info_error: \n{rdata}")
             return "None"
-
     return wrapper
 
 
@@ -112,33 +107,3 @@ def get_exe_bit(file_path):
         print('get exe bit error: File not found or cannot be opened')
         return 64
 
-
-def pattern_scan_all(handle, pattern, *, return_multiple=False, find_num=100):
-    """
-    扫描内存中所有匹配的模式
-    :param handle: 进程句柄
-    :param pattern: 模式
-    :param return_multiple: 是否返回所有匹配
-    :param find_num: 最多查找数量
-    """
-    next_region = 0
-    found = []
-    user_space_limit = 0x7FFFFFFF0000 if sys.maxsize > 2 ** 32 else 0x7fff0000
-    while next_region < user_space_limit:
-        try:
-            next_region, page_found = pymem.pattern.scan_pattern_page(
-                handle,
-                next_region,
-                pattern,
-                return_multiple=return_multiple
-            )
-        except Exception as e:
-            print(e)
-            break
-        if not return_multiple and page_found:
-            return page_found
-        if page_found:
-            found += page_found
-        if len(found) > find_num:
-            break
-    return found