Add g_CiOptions offset extract "feature"

Here is an example :  
ExtractOffsets.py ci -i C:\Windows\System32\ci.dll

Offsets/ExtractOffsets.py

@@ -13,8 +13,8 @@ import threading
 CSVLock = threading.Lock()
 
 machineType = dict(x86=332, x64=34404)
-knownImageVersions = dict(ntoskrnl=list(), wdigest=list())
+knownImageVersions = dict(ntoskrnl=list(), wdigest=list(),ci=list())
-extensions_by_mode = dict(ntoskrnl="exe", wdigest="dll")
+extensions_by_mode = dict(ntoskrnl="exe", wdigest="dll",ci="dll")
 
 def run(args, **kargs):
     """Wrap subprocess.run to works on Windows and Linux"""
@@ -41,7 +41,12 @@ def downloadSpecificFile(entry, pe_basename, pe_ext, knownPEVersions, output_fol
     virtual_size = entry['fileInfo']['virtualSize']
     file_id = hex(timestamp).replace('0x','').zfill(8).upper() + hex(virtual_size).replace('0x','')
     url = 'https://msdl.microsoft.com/download/symbols/' + pe_name + '/' + file_id + '/' + pe_name
+    # fix download error, sometimes version does not exist
+    try:
         version = entry['fileInfo']['version'].split(' ')[0]
+    except KeyError:
+        print(f"{url} version is unknown.")
+        return "SKIP"
     
     # Output file format: <PE>_build-revision.<exe | dll>
     output_version = '-'.join(version.split('.')[-2:])
@@ -126,6 +131,9 @@ def extractOffsets(input_file, output_file, mode):
                 elif "wdigest.dll" in line:
                     imageType = "wdigest"
                     break
+                elif "CI.dll" in line:
+                    imageType = "ci"
+                    break
             else:
                 print(f"[*] File {input_file} unrecognized")
                 return 
@@ -170,6 +178,10 @@ def extractOffsets(input_file, output_file, mode):
                 ("g_fParameter_UseLogonCredential",get_symbol_offset), 
                 ("g_IsCredGuardEnabled",get_symbol_offset)
                 ]
+            elif imageType == "ci":
+                symbols = [
+                ("g_CiOptions",get_symbol_offset), 
+                ]
                             
                 
             symbols_values = list()
@@ -219,18 +231,18 @@ def loadOffsetsFromCSV(loadedVersions, CSVPath):
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()
     
-    parser.add_argument('mode', help='ntoskrnl or wdigest. Mode to download and extract offsets for either ntoskrnl or wdigest')
+    parser.add_argument('mode', help='ntoskrnl or wdigest or ci. Mode to download and extract offsets for either ntoskrnl or wdigest or ci')
     parser.add_argument('-i', '--input', dest='input', required=True,
-                        help='Single file or directory containing ntoskrnl.exe / wdigest.dll to extract offsets from. If in download mode, the PE downloaded from MS symbols servers will be placed in this folder.')
+                        help='Single file or directory containing ntoskrnl.exe / wdigest.dll / ci.dll to extract offsets from. If in download mode, the PE downloaded from MS symbols servers will be placed in this folder.')
     parser.add_argument('-o', '--output', dest='output', 
-                        help='CSV file to write offsets to. If the specified file already exists, only new ntoskrnl versions will be downloaded / analyzed. Defaults to NtoskrnlOffsets.csv / WdigestOffsets.csv in the current folder.')
+                        help='CSV file to write offsets to. If the specified file already exists, only new ntoskrnl versions will be downloaded / analyzed. Defaults to NtoskrnlOffsets.csv / WdigestOffsets.csv / CiOffsets.csv in the current folder.')
     parser.add_argument('-d', '--download', dest='download', action='store_true',
                         help='Flag to download the PE from Microsoft servers using list of versions from winbindex.m417z.com.')
     
     args = parser.parse_args()
     mode = args.mode.lower()
     if mode not in knownImageVersions:
-        print(f'[!] ERROR : unsupported mode "{args.mode}", supported mode are: "ntoskrnl" and "wdigest"')      
+        print(f'[!] ERROR : unsupported mode "{args.mode}", supported mode are: "ntoskrnl" and "wdigest" and "ci"')      
         exit(1)
     
     # check R2 version
@@ -269,6 +281,8 @@ if __name__ == '__main__':
                 output.write('ntoskrnlVersion,PspCreateProcessNotifyRoutineOffset,PspCreateThreadNotifyRoutineOffset,PspLoadImageNotifyRoutineOffset,_PS_PROTECTIONOffset,EtwThreatIntProvRegHandleOffset,EtwRegEntry_GuidEntryOffset,EtwGuidEntry_ProviderEnableInfoOffset,PsProcessType,PsThreadType,CallbackList\n')
             elif mode == "wdigest":
                 output.write('wdigestVersion,g_fParameter_UseLogonCredentialOffset,g_IsCredGuardEnabledOffset\n')
+            elif mode == "ci":
+                output.write('g_CiOptionsOffset\n')
             else:
                 assert False
     # In download mode, an updated list of image versions published will be retrieved from https://winbindex.m417z.com.