spellcheck
parent
03fcfc496a
commit
970c5d115a
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@ -1,7 +1,6 @@
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# -*- coding: binary -*-
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module Rex
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module Parser
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###
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#
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# This class parses the contents of an NTFS partition file.
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@ -19,9 +18,9 @@ module Rex
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@file_handler = file_handler
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data = @file_handler.read(4096)
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# Boot sector reading
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@bytes_per_sector = data[11, 2].unpack("v")[0]
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@sector_per_cluster = data[13].unpack("C")[0]
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@cluster_per_mft_record = data[64].unpack("c")[0]
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@bytes_per_sector = data[11, 2].unpack('v')[0]
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@sector_per_cluster = data[13].unpack('C')[0]
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@cluster_per_mft_record = data[64].unpack('c')[0]
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if @cluster_per_mft_record < 0
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@bytes_per_mft_record = 2**(-@cluster_per_mft_record)
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@cluster_per_mft_record = @bytes_per_mft_record.to_f / @bytes_per_sector / @sector_per_cluster
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@ -29,7 +28,7 @@ module Rex
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@bytes_per_mft_record = @bytes_per_sector * @sector_per_cluster * @cluster_per_mft_record
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end
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@bytes_per_cluster = @sector_per_cluster * @bytes_per_sector
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@mft_logical_cluster_number = data[48, 8].unpack("Q<")[0]
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@mft_logical_cluster_number = data[48, 8].unpack('Q<')[0]
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@mft_offset = @mft_logical_cluster_number * @sector_per_cluster * @bytes_per_sector
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@file_handler.seek(@mft_offset)
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@mft = @file_handler.read(@bytes_per_mft_record)
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@ -40,7 +39,7 @@ module Rex
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#
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def mft_record_from_mft_num(mft_num)
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mft_num_offset = mft_num * @cluster_per_mft_record
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mft_data_attribute = mft_record_attribute(@mft)[DATA_ATTRIBUTE_ID]["data"]
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mft_data_attribute = mft_record_attribute(@mft)[DATA_ATTRIBUTE_ID]['data']
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cluster_from_attribute_non_resident(mft_data_attribute, mft_num_offset, @bytes_per_mft_record)
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end
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@ -49,7 +48,7 @@ module Rex
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#
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def real_size_from_filenameattribute(attribute)
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filename_attribute = attribute
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filename_attribute[48, 8].unpack("Q<")[0]
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filename_attribute[48, 8].unpack('Q<')[0]
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end
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#
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@ -59,7 +58,7 @@ module Rex
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filename_attribute = attribute
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length_of_name = filename_attribute[64].ord
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# uft16 *2
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d = ::Encoding::Converter.new("UTF-16LE", "UTF-8")
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d = ::Encoding::Converter.new('UTF-16LE', 'UTF-8')
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d.convert(filename_attribute[66, (length_of_name * 2)])
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end
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@ -72,10 +71,10 @@ module Rex
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def file_content_from_mft_num(mft_num, size)
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mft_record = mft_record_from_mft_num(mft_num)
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attribute_list = mft_record_attribute(mft_record)
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if attribute_list[DATA_ATTRIBUTE_ID]["resident"]
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return attribute_list[DATA_ATTRIBUTE_ID]["data"]
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if attribute_list[DATA_ATTRIBUTE_ID]['resident']
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return attribute_list[DATA_ATTRIBUTE_ID]['data']
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else
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data_attribute = attribute_list[DATA_ATTRIBUTE_ID]["data"]
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data_attribute = attribute_list[DATA_ATTRIBUTE_ID]['data']
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return cluster_from_attribute_non_resident(data_attribute)[0, size]
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end
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end
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@ -85,14 +84,15 @@ module Rex
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#
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def parse_index(index_entry)
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res = {}
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filename_size = index_entry[10, 2].unpack("v")[0]
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filename_size = index_entry[10, 2].unpack('v')[0]
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filename_attribute = index_entry[16, filename_size]
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# Should be 8 bytes but it doesn't work
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# mft_offset = index_entry[0.unpack("Q<",:8])[0]
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# mft_offset = index_entry[0.unpack('Q<',:8])[0]
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# work with 4 bytes
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mft_offset = index_entry[0, 4].unpack("V")[0]
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res[filename_from_filenameattribute(filename_attribute)] = { "mft_offset" => mft_offset,
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"file_size" => real_size_from_filenameattribute(filename_attribute) }
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mft_offset = index_entry[0, 4].unpack('V')[0]
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res[filename_from_filenameattribute(filename_attribute)] = {
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'mft_offset' => mft_offset,
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'file_size' => real_size_from_filenameattribute(filename_attribute) }
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res
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end
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@ -101,29 +101,29 @@ module Rex
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# INDEX_ALLOCATION
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#
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def parse_index_list(index_record, index_allocation_attribute)
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offset_index_entry_list = index_record[0, 4].unpack("V")[0]
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index_size = index_record[offset_index_entry_list + 8, 2].unpack("v")[0]
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offset_index_entry_list = index_record[0, 4].unpack('V')[0]
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index_size = index_record[offset_index_entry_list + 8, 2].unpack('v')[0]
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index_entry = index_record[offset_index_entry_list, index_size]
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res = {}
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while index_entry[12, 4].unpack("V")[0] & 2 != 2
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while index_entry[12, 4].unpack('V')[0] & 2 != 2
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res.update(parse_index(index_entry))
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# if son
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if index_entry[12, 4].unpack("V")[0] & 1 == 1
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if index_entry[12, 4].unpack('V')[0] & 1 == 1
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# should be 8 bytes length
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vcn = index_entry[-8, 4].unpack("V")[0]
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vcn = index_entry[-8, 4].unpack('V')[0]
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vcn_in_bytes = vcn * @bytes_per_cluster
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index_size_in_bytes = index_size * @bytes_per_cluster
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res_son = parse_index_list(index_allocation_attribute[vcn_in_bytes + 24, index_size_in_bytes], index_allocation_attribute)
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res.update(res_son)
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end
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offset_index_entry_list += index_size
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index_size = index_record[offset_index_entry_list + 8, 2].unpack("v")[0]
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index_size = index_record[offset_index_entry_list + 8, 2].unpack('v')[0]
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index_entry = index_record [offset_index_entry_list, index_size]
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end
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# if son on the last
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if index_entry[12, 4].unpack("V")[0] & 1 == 1
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if index_entry[12, 4].unpack('V')[0] & 1 == 1
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# should be 8 bytes length
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vcn = index_entry[-8, 4].unpack("V")[0]
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vcn = index_entry[-8, 4].unpack('V')[0]
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vcn_in_bytes = vcn * @bytes_per_cluster
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index_size_in_bytes = index_size * @bytes_per_cluster
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res_son = parse_index_list(index_allocation_attribute[vcn_in_bytes + 24, index_size_in_bytes], index_allocation_attribute)
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@ -141,16 +141,16 @@ module Rex
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if attributes.key?(INDEX_ALLOCATION_ID)
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return parse_index_list(index_record, attributes[INDEX_ALLOCATION_ID])
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else
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return parse_index_list(index_record, "")
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return parse_index_list(index_record, '')
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end
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end
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def cluster_from_attribute_non_resident(attribute, cluster_num = 0, size_max = ((2**31) - 1))
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lowvcn = attribute[16, 8].unpack("Q<")[0]
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highvcn = attribute[24, 8].unpack("Q<")[0]
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offset = attribute[32, 2].unpack("v")[0]
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real_size = attribute[48, 8].unpack("Q<")[0]
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attribut = ""
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lowvcn = attribute[16, 8].unpack('Q<')[0]
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highvcn = attribute[24, 8].unpack('Q<')[0]
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offset = attribute[32, 2].unpack('v')[0]
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real_size = attribute[48, 8].unpack('Q<')[0]
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attribut = ''
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run_list_num = lowvcn
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old_offset = 0
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run_length_size = first_runlist_byte & 15
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run_length = attribute[offset + 1, run_length_size]
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run_length += "\x00" * (8 - run_length_size)
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run_length = run_length.unpack("Q<")[0]
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run_length = run_length.unpack('Q<')[0]
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offset_run_offset = offset + 1 + run_length_size
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run_offset = attribute[offset_run_offset, run_offset_size]
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@ -169,7 +169,7 @@ module Rex
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else
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run_offset += "\x00" * (8 - run_offset_size)
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end
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run_offset = run_offset.unpack("q<")[0]
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run_offset = run_offset.unpack('q<')[0]
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size_wanted = [run_length * @bytes_per_cluster, size_max - attribut.length].min
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@ -179,7 +179,7 @@ module Rex
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run_list_offset = run_list_offset.to_i
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@file_handler.seek(run_list_offset)
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data = ""
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data = ''
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while data.length < size_wanted
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data << @file_handler.read(size_wanted - data.length)
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end
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#
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# return the attribute list from the MFT record
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# deal with resident and non resident attributes (but not $DATA due to perforemence issue)
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# deal with resident and non resident attributes (but not $DATA due to performance issue)
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#
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def mft_record_attribute(mft_record)
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attribute_list_offset = mft_record[20, 2].unpack("C")[0]
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attribute_list_offset = mft_record[20, 2].unpack('C')[0]
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curs = attribute_list_offset
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attribute_identifier = mft_record[curs, 4].unpack("V")[0]
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attribute_identifier = mft_record[curs, 4].unpack('V')[0]
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res = {}
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while attribute_identifier != 0xFFFFFFFF
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# attribute_size=mft_record[curs + 4, 4].unpack("V")[0]
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# attribute_size=mft_record[curs + 4, 4].unpack('V')[0]
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# should be on 4 bytes but doesnt work
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attribute_size = mft_record[curs + 4, 2].unpack("v")[0]
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#print_debug("attribute_size: #{attribute_size}, attribute_identifier: #{attribute_identifier}")
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attribute_size = mft_record[curs + 4, 2].unpack('v')[0]
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# resident
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if mft_record[curs + 8] == "\x00"
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content_size = mft_record[curs + 16, 4].unpack("V")[0]
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content_offset = mft_record[curs + 20, 2].unpack("v")[0]
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content_size = mft_record[curs + 16, 4].unpack('V')[0]
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content_offset = mft_record[curs + 20, 2].unpack('v')[0]
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res[attribute_identifier] = mft_record[curs + content_offset, content_size]
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else
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# non resident
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@ -221,11 +220,12 @@ module Rex
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end
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end
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if attribute_identifier == DATA_ATTRIBUTE_ID
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res[attribute_identifier] = { "data" => res[attribute_identifier],
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"resident" => mft_record[curs + 8] == "\x00" }
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res[attribute_identifier] = {
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'data' => res[attribute_identifier],
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'resident' => mft_record[curs + 8] == "\x00" }
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end
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curs += attribute_size
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attribute_identifier = mft_record[curs, 4].unpack("V")[0]
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attribute_identifier = mft_record[curs, 4].unpack('V')[0]
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end
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res
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end
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@ -236,22 +236,17 @@ module Rex
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def file(path)
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repertory = mft_record_from_mft_num(5)
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index_entry = {}
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for r in path.split("\\")
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for r in path.split('\\')
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attributes = mft_record_attribute(repertory)
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index = index_list_from_attributes(attributes)
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#print_debug("#{index}")
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unless index.key?(r)
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fail ArgumentError, "File path does not exist", caller
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fail ArgumentError, 'File path does not exist', caller
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end
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index_entry = index[r]
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repertory = mft_record_from_mft_num(index_entry["mft_offset"])
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repertory = mft_record_from_mft_num(index_entry['mft_offset'])
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end
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file_content_from_mft_num(index_entry["mft_offset"], index_entry["file_size"])
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file_content_from_mft_num(index_entry['mft_offset'], index_entry['file_size'])
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end
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end
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end
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end
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# f = open(ARGV[0],"r")
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# ntfs = NTFS.new(f)
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# puts ntfs.file(ARGV[1])
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# f.close
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@ -75,7 +75,7 @@ class Metasploit3 < Msf::Post
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ensure
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client.railgun.kernel32.CloseHandle(@handle)
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end
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print_status("Post Successfuly")
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print_status("Post Successful")
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end
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def read(size)
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