homepage
Open menu Go one level top
  • Train and Certify
    • Get Started in Cyber
    • Courses & Certifications
    • Training Roadmap
    • Search For Training
    • Online Training
    • OnDemand
    • Live Training
    • Summits
    • Cyber Ranges
    • College Degrees & Certificates
    • NICE Framework
    • DoDD 8140
    • Specials
  • Manage Your Team
    • Overview
    • Security Awareness Training
    • Voucher Program
    • Private Training
    • Workforce Development
    • Skill Assessments
    • Hiring Opportunities
  • Resources
    • Overview
    • Reading Room
    • Webcasts
    • Newsletters
    • Blog
    • Tip of The Day
    • Posters
    • Top 25 Programming Errors
    • The Critical Security Controls
    • Security Policy Project
    • Critical Vulnerability Recaps
    • Affiliate Directory
  • Focus Areas
    • Blue Team Operations
    • Cloud Security
    • Digital Forensics & Incident Response
    • Industrial Control Systems
    • Leadership
    • Offensive Operations
  • Get Involved
    • Overview
    • SANS Community
    • CyberTalent
    • Work Study
    • Instructor Development
    • Sponsorship Opportunities
    • COINS
  • About
    • About SANS
    • Why SANS?
    • Instructors
    • Cybersecurity Innovation Awards
    • Contact
    • Frequently Asked Questions
    • Customer Reviews
    • Press Room
  • Log In
  • Join
  • Contact Us
  • SANS Sites
    • GIAC Security Certifications
    • Internet Storm Center
    • SANS Technology Institute
    • Security Awareness Training
  • Search
  1. Home >
  2. Blog >
  3. PTK: Evidence adding and Indexing
Michele Zambelli

PTK: Evidence adding and Indexing

December 10, 2008

At the moment the output formats used in computer forensics for the support of media duplication are mainly three:

  • ? dd (RAW image) — the best and most utilized format
  • ? Encase format (EWF) — closed format now widely supported by the CF products
  • ? AFF Lib Format— very complete but still expanding

PTK can recognize the above listed formats. Usually, a media copy can be made from a single file or on split files. PTK is able to recognize the split image situation and, given the first chunk, automatically import the additional files. No log files or other types of data are allowed inside the evidence directory (i.e. file.e01, file.e02, file.log is not permitted). Through TSK, PTK automatically recognizes every partition in the image including support for the following file systems type: NTFS, FAT, UFS 1, UFS 2, EXT2FS, EXT3FS, and ISO 9660. One may also define, if necessary, the original time zone. Remember that for the FAT file system, time information are saved according to the local system date. With PTK, during the FAT image importing, the timestamps are converted from the original system's local time into GMT/UTC time. For the NTFS file system, the timestamps are already saved in GMT/UTC format and thus the time zone setting represents only a visualization parameter that can be changed at all times. For every added evidence you can obviously calculate the hash code (MD5, SHA1) and check it with a well-known one.

In case PTK is not able to identify the file system the user can choose to import the image as RAM dump and make use of the RAM dump analysis or import it as RAW image and have the ability to analyse the disk through the Data Unit or to run the Live Keyword Search on it. During the evidence importing process it is possible to decide whether to create a symbolic link to the image or copy the entire evidence, split or not, inside the PTK directory images (%www path%/ptk/images).

Even if PTK doesn't change in any way the evidence file, it is advisable to always use a write blocker. In case the write block is Firewire, and not ATA, it is recommended that you copy the entire evidence on a disk in order to improve data access speed and the performance consequently. The indexing process requires a number of resources in terms of CPU and I/O disk. Once the evidence is imported it is possible to start working directly on it through various analysis modules (File Analysis, Live Keyword Search, Data Unit, etc..) or start the indexing process. PTK's indexing engine, discussed on in previous articles, allows one to perform different automated tasks and produce results that all investigators assigned to the case can consult. The indexing process supplies all investigators with its analysis results but it's launched only once by the Master Investigator. The diagram below contains the indexing process operated by PTK using TSK tools. The performance of the indexing engine was improved compared to the first beta versions.

The next article will deal with PTK's multi-user system, the possibility to forbid more than one investigator to access specific cases and the bookmarking features available for every investigator.

Michele Zambelli, GCFA SIlver #1856, is a member of PTK Team and a Security Consultant at DFLabs Italy.

Share:
TwitterLinkedInFacebook
Copy url Url was copied to clipboard
Subscribe to SANS Newsletters
Join the SANS Community to receive the latest curated cybersecurity news, vulnerabilities, and mitigations, training opportunities, plus our webcast schedule.
United States
Canada
United Kingdom
Spain
Belgium
Denmark
Norway
Netherlands
Australia
India
Japan
Singapore
Afghanistan
Aland Islands
Albania
Algeria
American Samoa
Andorra
Angola
Anguilla
Antarctica
Antigua and Barbuda
Argentina
Armenia
Aruba
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belize
Benin
Bermuda
Bhutan
Bolivia
Bonaire, Sint Eustatius, and Saba
Bosnia And Herzegovina
Botswana
Bouvet Island
Brazil
British Indian Ocean Territory
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Cape Verde
Cayman Islands
Central African Republic
Chad
Chile
China
Christmas Island
Cocos (Keeling) Islands
Colombia
Comoros
Cook Islands
Costa Rica
Croatia (Local Name: Hrvatska)
Curacao
Cyprus
Czech Republic
Democratic Republic of the Congo
Djibouti
Dominica
Dominican Republic
East Timor
East Timor
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Ethiopia
Falkland Islands (Malvinas)
Faroe Islands
Fiji
Finland
France
French Guiana
French Polynesia
French Southern Territories
Gabon
Gambia
Georgia
Germany
Ghana
Gibraltar
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guernsey
Guinea
Guinea-Bissau
Guyana
Haiti
Heard And McDonald Islands
Honduras
Hong Kong
Hungary
Iceland
Indonesia
Iraq
Ireland
Isle of Man
Israel
Italy
Jamaica
Jersey
Jordan
Kazakhstan
Kenya
Kingdom of Saudi Arabia
Kiribati
Korea, Republic Of
Kosovo
Kuwait
Kyrgyzstan
Lao People's Democratic Republic
Latvia
Lebanon
Lesotho
Liberia
Liechtenstein
Lithuania
Luxembourg
Macau
Macedonia
Madagascar
Malawi
Malaysia
Maldives
Mali
Malta
Marshall Islands
Martinique
Mauritania
Mauritius
Mayotte
Mexico
Micronesia, Federated States Of
Moldova, Republic Of
Monaco
Mongolia
Montenegro
Montserrat
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
Netherlands Antilles
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Niue
Norfolk Island
Northern Mariana Islands
Oman
Pakistan
Palau
Palestine
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Pitcairn
Poland
Portugal
Puerto Rico
Qatar
Reunion
Romania
Russian Federation
Rwanda
Saint Bartholemy
Saint Kitts And Nevis
Saint Lucia
Saint Martin
Saint Vincent And The Grenadines
Samoa
San Marino
Sao Tome And Principe
Senegal
Serbia
Seychelles
Sierra Leone
Sint Maarten
Slovakia (Slovak Republic)
Slovenia
Solomon Islands
South Africa
South Georgia and the South Sandwich Islands
South Sudan
Sri Lanka
St. Helena
St. Pierre And Miquelon
Suriname
Svalbard And Jan Mayen Islands
Swaziland
Sweden
Switzerland
Taiwan
Tajikistan
Tanzania
Thailand
Togo
Tokelau
Tonga
Trinidad And Tobago
Tunisia
Turkey
Turkmenistan
Turks And Caicos Islands
Tuvalu
Uganda
Ukraine
United Arab Emirates
United States Minor Outlying Islands
Uruguay
Uzbekistan
Vanuatu
Vatican City
Venezuela
Vietnam
Virgin Islands (British)
Virgin Islands (U.S.)
Wallis And Futuna Islands
Western Sahara
Yemen
Yugoslavia
Zambia
Zimbabwe

Tags:
  • Digital Forensics and Incident Response

Related Content

Blog
SUMMIT_Free_SANS_2021_Summits_Teaser.jpg
Digital Forensics and Incident Response, Cyber Defense Essentials, Industrial Control Systems Security, Purple Team, Blue Team Operations, Penetration Testing and Ethical Hacking, Cloud Security, Security Management, Legal, and Audit
November 30, 2020
Good News: SANS Virtual Summits Will Be FREE for the Community in 2021
They’re virtual. They’re global. They’re free.
Emily Blades
read more
Blog
En.png
Digital Forensics and Incident Response
November 24, 2020
SANS DFIR Presenta Nuevos Webcasts en Español
SANS DFIR presenta sus nuevos episodios en Español! En este blog podrás ver todos los episodios con concluciones y con recursos para aprender DFIR
SANS DFIR
read more
Blog
shutterstock_1473864617.jpg
Digital Forensics and Incident Response
October 14, 2020
Defense Spotlight: Finding Hidden Windows Services
Attackers can make a Window services disappear from view. Fortunately these services can still be found, through unconventional discovery techniques.
370x370_Joshua-Wright.jpg
Joshua Wright
read more
  • Register to Learn
  • Courses
  • Certifications
  • Degree Programs
  • Cyber Ranges
  • Job Tools
  • Security Policy Project
  • Posters
  • The Critical Security Controls
  • Focus Areas
  • Blue Team Operations
  • Cloud Security
  • Cybersecurity Leadership
  • Digital Forensics
  • Industrial Control Systems
  • Offensive Operations
Subscribe to SANS Newsletters
Join the SANS Community to receive the latest curated cybersecurity news, vulnerabilities, and mitigations, training opportunities, plus our webcast schedule.
United States
Canada
United Kingdom
Spain
Belgium
Denmark
Norway
Netherlands
Australia
India
Japan
Singapore
Afghanistan
Aland Islands
Albania
Algeria
American Samoa
Andorra
Angola
Anguilla
Antarctica
Antigua and Barbuda
Argentina
Armenia
Aruba
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belize
Benin
Bermuda
Bhutan
Bolivia
Bonaire, Sint Eustatius, and Saba
Bosnia And Herzegovina
Botswana
Bouvet Island
Brazil
British Indian Ocean Territory
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Cape Verde
Cayman Islands
Central African Republic
Chad
Chile
China
Christmas Island
Cocos (Keeling) Islands
Colombia
Comoros
Cook Islands
Costa Rica
Croatia (Local Name: Hrvatska)
Curacao
Cyprus
Czech Republic
Democratic Republic of the Congo
Djibouti
Dominica
Dominican Republic
East Timor
East Timor
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Ethiopia
Falkland Islands (Malvinas)
Faroe Islands
Fiji
Finland
France
French Guiana
French Polynesia
French Southern Territories
Gabon
Gambia
Georgia
Germany
Ghana
Gibraltar
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guernsey
Guinea
Guinea-Bissau
Guyana
Haiti
Heard And McDonald Islands
Honduras
Hong Kong
Hungary
Iceland
Indonesia
Iraq
Ireland
Isle of Man
Israel
Italy
Jamaica
Jersey
Jordan
Kazakhstan
Kenya
Kingdom of Saudi Arabia
Kiribati
Korea, Republic Of
Kosovo
Kuwait
Kyrgyzstan
Lao People's Democratic Republic
Latvia
Lebanon
Lesotho
Liberia
Liechtenstein
Lithuania
Luxembourg
Macau
Macedonia
Madagascar
Malawi
Malaysia
Maldives
Mali
Malta
Marshall Islands
Martinique
Mauritania
Mauritius
Mayotte
Mexico
Micronesia, Federated States Of
Moldova, Republic Of
Monaco
Mongolia
Montenegro
Montserrat
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
Netherlands Antilles
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Niue
Norfolk Island
Northern Mariana Islands
Oman
Pakistan
Palau
Palestine
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Pitcairn
Poland
Portugal
Puerto Rico
Qatar
Reunion
Romania
Russian Federation
Rwanda
Saint Bartholemy
Saint Kitts And Nevis
Saint Lucia
Saint Martin
Saint Vincent And The Grenadines
Samoa
San Marino
Sao Tome And Principe
Senegal
Serbia
Seychelles
Sierra Leone
Sint Maarten
Slovakia (Slovak Republic)
Slovenia
Solomon Islands
South Africa
South Georgia and the South Sandwich Islands
South Sudan
Sri Lanka
St. Helena
St. Pierre And Miquelon
Suriname
Svalbard And Jan Mayen Islands
Swaziland
Sweden
Switzerland
Taiwan
Tajikistan
Tanzania
Thailand
Togo
Tokelau
Tonga
Trinidad And Tobago
Tunisia
Turkey
Turkmenistan
Turks And Caicos Islands
Tuvalu
Uganda
Ukraine
United Arab Emirates
United States Minor Outlying Islands
Uruguay
Uzbekistan
Vanuatu
Vatican City
Venezuela
Vietnam
Virgin Islands (British)
Virgin Islands (U.S.)
Wallis And Futuna Islands
Western Sahara
Yemen
Yugoslavia
Zambia
Zimbabwe
  • © 2021 SANS™ Institute
  • Privacy Policy
  • Contact
  • Twitter
  • Facebook
  • Youtube
  • LinkedIn