Digital Forensics in Small Devices: RFID Tag Investigation

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1.0 INTRODUCTION Chapter 1 - Introduction The goal of ubiquitous computing, as described by Mark Weiser (1991 & 1993, p. 75), is “making many computers available throughout the physical environment, while making them effectively invisible to the user”. However, the border line between the virtual and physical world has become faded as the technologies in the age of ubiquitous computing (for examples; sensor networks, Global Positioning Systems, Radio Frequency Identification Systems and the like) enable those ubiquitous devices to connect with each other and to the Internet. Crime and criminal activity has also flourished as a result of the new technology opportunities. The exposing or theft of personal information, location and context information are the challenges related to security (Juels, 2005; Bhargava, 2006; Albrecht, 2006; Ding & Bo, 2008) and privacy in ubiquitous devices and technologies (Garfinkel, Juels, & Pappu, 2005; Anthony, Kotz, & Henderson, 2007). Radio Frequency Identification (RFID) is one of the emerging and promising ubiquitous computing technologies (Roberts, 2006) applied in an extensive range of applications such as ticketing (Nath, Reynolds, & Want, 2006), healthcare (Borriello, 2005), payment systems like Speedpass (Haines, 2006a), stock management systems in retail environments like Future Store in Germany (Haines, 2006b) and supply-chain management in Wal-Mart (Sheng, Li, & Zeadally, 2008) and so on. RFID, which uses wireless communications technology, is convenient for automatic identification of items or objects by tagging them with RFID tags (Borriello, 2005) and is analogous to a bar code system (Roberts, 2006). Hence, the Read/Write RFID tags are used in the retail environment to tag stock with an ID that provides two utility values for the retailer, namely theft protection (for example, the tag is removed at the point of sale so the exit sensors do not alarm) and also mapping into the retail database for price and stock control – this includes the point of sale (POS) process and inventory control 1
process (see Chalasani, Boppana, & Sounderpandian, 2005). As a result of the low cost and improved capabilities of RFID tags, the tags are employed in many applications. However, the employment of the tags does not only bring benefits (such as ease of stock management, and the anti-counterfeiting of medicines) but also give the significant challenges and threats (see Section 2.4 in Chapter 2) to the businesses or organizations. As a consequence, the objective of this research is to investigate the presence of digital evidence after the theft of a RFID tagged stock item (SI) in a forensically sound manner. Hence, the purpose of this chapter is to present an overview of the problem or a gap in the current literature (Section 1.1), the motivation of the research (Section 1.2), a brief presentation of main research findings (Section 1.3) and the structure of thesis (Section 1.4). 1.1 THE PROBLEM OR GAP IN CURRENT LITERATURE The potential for fraudulent intervention into a RFID system is established in the literature (Chapter 2; Section 2.4). Some researchers (for example: Ngai, Moon, Riggins, &Yi, 2008) provide a comprehensive 1995 – 2005 review relevant to RFID research. Other researchers (Jones, Hoare, Dontharaju, Shenchih, Fazekas, Cain, & Mickle, 2006a) describe the evolution of RFID tag design and process time costs. In the manufacture of chips, the access to writing has become easier in the interest of letting retailers code their own chips. The benefit has however brought with it easier access for criminals to write and rewrite over chips and hence change the values (including the null value) in a RFID system. One of the concerns for the RFID based retail environment is that as tags are made more user friendly, then the risk of attack grows. Hence, most of the previous literature reported the security risk concerned with RFID systems. Consequently, it is exposed that the requirement of forensic readiness is necessary as there is potential for the fraudulent uses of RFID networks in commercial settings. On the other hand, the digital forensic research into small devices is a current growth area of knowledge (Harrill & Mislan, 2007). In the Digital Forensic Research Workshop (DFRWS) road map for Digital Forensic research, small devices are again prioritised as key areas for research and growth of investigator knowledge (Palmer, 2001). Similarly, some researchers (Xiao, Yu, 2
Page 1 and 2: Digital Forensics in Small Devices:
Page 3 and 4: iii Acknowledgements This thesis wa
Page 5 and 6: v Abstract Read/Write Radio Frequen
Page 7 and 8: vii Table of Contents (Volume 1) De
Page 9 and 10: ix 3.2.2.2 The POS Entity Security
Page 11 and 12: xi 4.3.4 Analysis of the Physical D
Page 13 and 14: xiii List of Tables Table 2.1 Chara
Page 15 and 16: Figure 4.3: Error encountered durin
Page 17 and 18: xvii Figure 4.53: Acquisitions of a
Page 19: LF Low Frequency xix LLRP Low Level
Page 23 and 24: of potential evidence after an even
Page 25 and 26: investigation. Likewise, all the re
Page 27 and 28: practices concerned with the forens
Page 29 and 30: defines different types of malware
Page 31 and 32: 2.1.1 RFID Transponders or Tags The
Page 33 and 34: Table 2.1: Characteristics and Clas
Page 35 and 36: Moreover, depending on the complexi
Page 37 and 38: However, according to EPCglobal (El
Page 39 and 40: According to Harmon (2006, pp. 45-4
Page 41 and 42: 2.2.1 Memory Technologies for RFID
Page 43 and 44: y the reader as the tag‟s address
Page 45 and 46: wavelength long and depends on the
Page 47 and 48: Karygiannis et al., (2007, pp. 2-15
Page 49 and 50: attacker can perform eavesdropping
Page 51 and 52: 2.5 RFID STOCK MANAGEMENT SECURITY
Page 53 and 54: Figure 2.15: RFID Business System S
Page 55 and 56: 3.0 INTRODUCTION Chapter 3 - Resear
Page 57 and 58: etrieve data to an external data so
Page 59 and 60: firstly affect the back-end RFID mi
Page 61 and 62: Figure 3.2: Scenario 1 illustration
Page 63 and 64: Unlike SQL Server forensics, the tr
Page 65 and 66: forensic workstation must be prepar
Page 67 and 68: Then, the researcher verified the S
Page 69 and 70: within the affected records”. In
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can also be found not only in the d
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Likewise, Relevancy is related to t
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3.2 THE RESEARCH DESIGN In the prev
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e investigated for evidence of the
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3.2.2 Review of Problem Areas in RF
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participants, the Information Syste
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3.2.3 Case Study The researcher int
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3.2.6 Research Question As stated i
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3.2.8 Data Map Figure 3.9: Data Map
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software (see Appendix 4) that can
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and Deng (2007) illustrated two eff
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system of the target machine (Jones
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other collected evidence data by us
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SQL Server artefacts (for the purpo
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presence of digital evidence after
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4.0 INTRODUCTION Chapter 4 - Resear
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Figure 4.1: Error encountered durin
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server (Figure 4.6) due to the user
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Section 4.2 include the snippets of
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4.2.2 Live Extraction of Binaries R
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4.2.3.1 Automated Artefact Collecti
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4.2.3.2 Ad Hoc Artefact Collection
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4.2.3.3.1 Active VLF Data After gat
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The acquisition result of ring buff
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Depending on the version of the vic
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syntax was used to acquire a server
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:out E:\SystemDatabaseRoleMembers.t
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However, according to Fowler (2009,
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After collecting the table statisti
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Thus, the result of the current tab
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4.2.3.4.6 Data Page Allocation Arte
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components of database were enabled
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The record of shutting down the ser
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“application logic and extend the
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4.2.3.6.5 SQL Server Error Logs Usu
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4.2.4 Physical Disk Drive Finally,
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Figure 4.56: Analyzing the image co
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could not. Hence, the artefacts cou
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5.0 INTRODUCTION Chapter 5 - Resear
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the laboratory to simulate a RFID t
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and confirmed the database was obvi
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SUMMARY: After analysing all the ac
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all the collected digital evidence
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Table 5.5: Secondary Research Quest
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write blocker (Tableau Forensic USB
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collected digital evidence files (b
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5.2.3 Discussion of Conducted Attac
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forensic work-station (Appendix 10)
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forensic test-station for the inves
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the trusted forensic toolkits. In a
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6.0 INTRODUCTION Chapter 6 - Conclu
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Table 6.1: Specific forensic tools
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the evidential data are the importa
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(Chapter 5; Section 5.3) for both d
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Bolan, C. (2007). A single channel
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El-Said, M. M., & Woodring, I. (200
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Hunt, V. D., Puglia, A., & Puglia,
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Kou, D., Zhao, K., Tao, Y., & Kou,
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Notes in Computer Science 5379(2009
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Tripwire, Inc. (2010a). Tripwire Ma
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Digital Forensics in Small Devices:
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Appendix 1: Volatile and Non-volati
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3 Activity Endpoints* ● md5deep N
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Appendix 2: Steps for Creating Radi
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14. Gather the latest versions of W
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The following is the detail record
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COMPLETE 'Logins.txt' (md5=A2993744
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(md5=A2993744A56BA83ADE52948062C968
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'Schemas.htm' (md5=30BB65A20F1381D7
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22:02:26: Hashing 'wft_cfg.txt' (md
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Record any checksum(s) below to lat
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22. Although the extended version o
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Appendix 3: Source Code of the Deve
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{ } else { MessageBox.Show("No read
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} } btnConnect.Enabled = true; btnD
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MessageBox.Show(this, "Connection t
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} } } dwNumEntries = usbRFID.GetNum
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add it to the list box LogItem.szID
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if(fdialog.FileName != "") { FileSt
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private string constr = @"Data Sour
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} } else { } catch (Exception ex) {
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} } } } insertTagtoDB(TagID, TagVal
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} break; case ("Protection"): { uiB
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} } } //this.Cursor = Cursors.Defau
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} } btnReadTag.Enabled = false; tmr
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private void insertTagtoDB(string T
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} } } private void btnLOGload_Click
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Step 4: Then, the Tripwire will per
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Similarly, Tripwire user account sh
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Figure A5.5: Installation of the Tr
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Appendix 6: An Example of the Condu
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Sync” allowing the users to confi
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Figure A6.8: RFID Sync Application
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Figure A6.10: Screenshot of writing
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Step 3: Configure the reader’s Ta
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Step 8: Edit the Tripwire configura
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Step 12: Record of the fictitious l
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Step 16: Similarly, check whether t
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Step 20: Check the primary database
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Appendix 7: Steps taken before the
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insert into rfid_log ( Tag, User_da
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Figure A7.3: Pre-keyed data in the
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Figure A7.7: Pre-keyed data in the
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Figure A7.11: Screenshot of Tripwir
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Step 10: Once Tripwire database was
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Appendix 8: Steps taken after the S
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Step 3: The integrity check was ini
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Figure A8.8: Screenshot of the Trip
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Figure A8.12: Screenshot of the bac
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Figure A9.3: Network Interface Card
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Figure A9.7: Enterprise Version of
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Appendix 10: Screenshots of Forensi
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Appendix 11: Forensically Sterilizi
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Figure A11. 4: Wiping all the secto
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Appendix 12: Steps for Copying and
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Figure A12.6: Acquiring the forensi
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12. However, the acquisition was ca
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15. Then, the original evidence dri
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18. Then, a bad signature file was
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Appendix 13: Artefacts Collected by
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Figure A13.5: Acquired backend SQL
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SQL SERVER - DATABASE SERVER INFORM
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Figure A13.15: Fragment of the acqu
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Figure A13.18: Result of the Acquir
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Figure A13.23: Result of the Acquir
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72CBADAE0A1F9FF34D4A35A9AB26BDB8 Au
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2428169B31C96FE4A767215000AA0008 in
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Appendix 15: WFT Tool Log during th
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06:31:36: Verifying 'sql\runsql.bat
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(md5=A7A43C52521F85BDD6683D9E0E4A00
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(md5=AB700D66945BBC9FBFA34002A808A2
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[DB Configuration] (md5=F416BF7233E
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(md5=FEDD1E9DF1B76C877B8027B62E401B
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06:32:21: Verifying 'xp\mem.exe' OK
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06:32:22: Verifying 'sysinternals\p
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'uptime.htm' (md5=B7456D103CBF5E49F
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'netlgrp.txt' (md5=E6D74D46AECD9692
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06:32:26: Verifying 'cygwin\cygwin1
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'cmdline.txt' (md5=B44C85C704337F00
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06:32:32: Verifying 'netlatency\ser
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06:32:35: Verifying 'diamondcs\ipli
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(md5=BB5127D25439D1B50A305B1CF865FE
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(md5=647578D95B7F3B11B6CCF833E29670
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06:32:41: Verifying 'perl\re.dll' O
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(md5=C4DA0F6D85F641B3E5A0F065AEDB27
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06:33:15: Verifying '2k\res_kit\dum
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[FILE SYSTEM] (md5=E9D558E387FC2208
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06:33:19: Running 'tools\xp\cmd.exe
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06:33:20: Verifying 'tools\xp\cmd.e
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'sys_ini.txt' (md5=B143A6852C9EF93E
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06:33:22: Running 'xp\at.exe' [#132
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06:33:24: Verifying 'microsoft\reg.
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(md5=4380D8F2014A5C35BF59DF30D079F0
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06:34:09: Running 'xp\gpresult.exe'
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06:34:15: Verifying 'microsoft\regd
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06:34:16: Running 'microsoft\reg.ex
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[DONE] SKIPPED (via '-nowrite' para
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'mail.gif' (md5=38477E98FB3ED60B829
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Step 3: The SQL poisoning attack wa
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Appendix 17: Live Acquisition of Ph
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The problem issue was clearly state
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Figure A17.9: Evidence item informa
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Figure A17.13: Successful creation
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Physical Drive Acquisition Report b
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Figure A18.2: Screenshot of the Acq
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Figure A18.4: Screenshots of the Ac
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Figure A19.2b: Screenshot of the In
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Figure A19.5: Screenshot of the lau
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Figure A19.10: Choosing the OS path
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Figure A19.16: Avoiding the tools t
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Figure A19.21a: WFT tool in action
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Figure A19.22b: The acquisition of
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Appendix 20: Extended wftSQL Batchf
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SET /P USERQUESTION=Use currently l
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Appendix 21_Screenshots of Hashing
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Appendix 22: Hash Values Comparison
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DBO_RFIDlog_tblStat_Date.txt Text 4
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IDE_Image.E06 EnCase Image eaa9522a
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Endpoints.htm Web Page d23eef6404ca
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PSLIST.HTM Web Page 79dbea76b982972
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IPXROUTE.HTM Web Page 97d4e1dd9621b
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PSFILE.HTM Web Page d6d58ad5914ef24
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HKLM_RS.HTM Web Page f756a379df8579
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MDM.HTM Web Page a5e04ce095305295ae
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WFT_CFG.TXT Text 1d378b80f8e0e7ea4f
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PCLIP.TXT Text 037130bf88e524d8f61a
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TLIST_V.TXT Text cdf2d49e302522e370
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HUNT.TXT Text 99553ccd8e14cae6db789
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C_hidden.txt Text 5f45b5367c7ed8852
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HKCU_R.TXT Text 9e7b99199b2931e811a
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ARKAR_US.B BASIC Source Code .E01 e
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CollationAndDataType.txt Text 37a07
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RFID_test.md5 45c0868ea943c2171ff35
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errorlog_4.md5 3f7f86d69760b535bd82
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Appendix 23: Analysis of Acquired S
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2010-10-25 12:37:05.56 Server Serve
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2010-10-05 01:22:55.53 Server Detec
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2010-10-07 15:20:54.21 Server Serve
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2010-10-25 12:17:39.26 Server Serve
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2010-10-03 00:59:55.96 Server Dedic
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2010-10-02 00:11:57.85 Server -d C:
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2010-10-02 02:40:05.35 Server SQL S
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2010-10-01 23:20:15.28 Server Dedic
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2010-10-01 23:14:19.50 Server Using
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2010-10-01 23:20:12.40 Server The S
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2010-10-01 23:12:03.65 spid4s Recov
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processed. Likewise, the acquired r
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Figure 24A.3: There is no record in
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