Podcast
Questions and Answers
Which activity is LEAST aligned with the principles of digital forensics?
Which activity is LEAST aligned with the principles of digital forensics?
- Employing mathematical validation techniques on data.
- Modifying data to improve readability for court presentation. (correct)
- Maintaining a strict chain of custody for all evidence.
- Using validated tools to analyze digital evidence.
A digital forensics investigator is hired to examine a company laptop suspected of containing evidence of intellectual property theft. Which type of investigation is this considered?
A digital forensics investigator is hired to examine a company laptop suspected of containing evidence of intellectual property theft. Which type of investigation is this considered?
- Criminal investigation.
- Hybrid investigation.
- Private-sector investigation. (correct)
- Public-sector investigation.
In the context of a criminal investigation, what is the primary purpose of a 'police blotter'?
In the context of a criminal investigation, what is the primary purpose of a 'police blotter'?
- To document the chain of custody for digital evidence collected at a crime scene.
- To provide a summary of legal guidelines on search and seizure for digital devices.
- To serve as the initial report filed by the investigating officer, detailing the crime scene analysis.
- To function as a historical database of previously reported crimes, aiding in pattern recognition and resource allocation. (correct)
What is the most accurate description of the 'Investigations Triad'?
What is the most accurate description of the 'Investigations Triad'?
Which of the following accurately differentiates digital forensics from data recovery?
Which of the following accurately differentiates digital forensics from data recovery?
A witness reports a crime to the police. What is this initial report typically referred to as in the context of initiating a criminal investigation?
A witness reports a crime to the police. What is this initial report typically referred to as in the context of initiating a criminal investigation?
What is the role of the Department of Justice (DOJ) in the context of digital forensics and investigations?
What is the role of the Department of Justice (DOJ) in the context of digital forensics and investigations?
Which of the following best describes the primary purpose of creating a forensic copy of digital evidence?
Which of the following best describes the primary purpose of creating a forensic copy of digital evidence?
Why is it important to use a write-blocking device when acquiring data from FAT or NTFS file systems using Windows tools?
Why is it important to use a write-blocking device when acquiring data from FAT or NTFS file systems using Windows tools?
During digital evidence analysis, which of the following data types are typically sought after?
During digital evidence analysis, which of the following data types are typically sought after?
Which action is most crucial for ensuring that findings in a digital forensics report can be validated?
Which action is most crucial for ensuring that findings in a digital forensics report can be validated?
After completing a digital forensics case, what type of self-assessment questions should an investigator ask to improve future performance?
After completing a digital forensics case, what type of self-assessment questions should an investigator ask to improve future performance?
What is the primary purpose of maintaining a chain of custody in digital forensics?
What is the primary purpose of maintaining a chain of custody in digital forensics?
A forensic investigator encounters a hard drive with a complex password. Which of the following actions should they consider?
A forensic investigator encounters a hard drive with a complex password. Which of the following actions should they consider?
Which of the following is NOT typically a challenge encountered during digital forensic investigations?
Which of the following is NOT typically a challenge encountered during digital forensic investigations?
During the systematic approach to digital forensics, what is the importance of creating a detailed checklist?
During the systematic approach to digital forensics, what is the importance of creating a detailed checklist?
Before analyzing and recovering data from a digital evidence drive, what critical step should an investigator perform?
Before analyzing and recovering data from a digital evidence drive, what critical step should an investigator perform?
In digital forensics, what is the purpose of 'risk mitigation' after identifying potential risks?
In digital forensics, what is the purpose of 'risk mitigation' after identifying potential risks?
Why is it important to 'test the design' in a systematic approach to digital forensics?
Why is it important to 'test the design' in a systematic approach to digital forensics?
What is a key objective when 'investigating the data you recover' during a digital forensic investigation?
What is a key objective when 'investigating the data you recover' during a digital forensic investigation?
Which of the following actions should be prioritized when making an initial assessment of a digital forensics case?
Which of the following actions should be prioritized when making an initial assessment of a digital forensics case?
How long is the case duration valid for?
How long is the case duration valid for?
Which of the following scenarios exemplifies a violation that a private-sector digital forensics investigation might address?
Which of the following scenarios exemplifies a violation that a private-sector digital forensics investigation might address?
A company wants to reduce its risk of litigation related to employee computer use. Besides an Acceptable Use Policy, what additional measure should it implement?
A company wants to reduce its risk of litigation related to employee computer use. Besides an Acceptable Use Policy, what additional measure should it implement?
In the context of digital forensics investigations within a company, what is the primary purpose of defining a clear 'line of authority'?
In the context of digital forensics investigations within a company, what is the primary purpose of defining a clear 'line of authority'?
Which of the following groups would be LEAST likely to be designated as having the authority to initiate a digital forensics investigation within a corporation?
Which of the following groups would be LEAST likely to be designated as having the authority to initiate a digital forensics investigation within a corporation?
What is the overarching objective of a digital forensics professional when gathering evidence in a corporate investigation?
What is the overarching objective of a digital forensics professional when gathering evidence in a corporate investigation?
Which of the following situations would LEAST likely warrant a digital forensics investigation in the private sector?
Which of the following situations would LEAST likely warrant a digital forensics investigation in the private sector?
What is the MOST important ethical consideration digital forensics investigators should adhere to during an investigation?
What is the MOST important ethical consideration digital forensics investigators should adhere to during an investigation?
Why is maintaining confidentiality so important for a digital forensics investigator?
Why is maintaining confidentiality so important for a digital forensics investigator?
A digital forensics investigator discovers evidence of illegal activity during a company investigation that falls outside of their original mandate. What is the MOST appropriate course of action?
A digital forensics investigator discovers evidence of illegal activity during a company investigation that falls outside of their original mandate. What is the MOST appropriate course of action?
Which step is most crucial in ensuring the integrity of digital evidence during retrieval and analysis?
Which step is most crucial in ensuring the integrity of digital evidence during retrieval and analysis?
What is the primary purpose of using an evidence custody form (chain-of-evidence form) in digital forensics?
What is the primary purpose of using an evidence custody form (chain-of-evidence form) in digital forensics?
Why is it important to use computer-safe products, such as antistatic bags and pads, when collecting computer evidence?
Why is it important to use computer-safe products, such as antistatic bags and pads, when collecting computer evidence?
In a private-sector high-tech investigation, what is the role of formal procedures and informal checklists?
In a private-sector high-tech investigation, what is the role of formal procedures and informal checklists?
Which of the following scenarios would most likely warrant a private-sector high-tech investigation related to employee termination?
Which of the following scenarios would most likely warrant a private-sector high-tech investigation related to employee termination?
What are the key sources of evidence that an investigator needs to gather when investigating internet abuse by an employee?
What are the key sources of evidence that an investigator needs to gather when investigating internet abuse by an employee?
Before transporting computer evidence, what consideration is most important to ensure its preservation?
Before transporting computer evidence, what consideration is most important to ensure its preservation?
What action compromises the integrity of digital evidence?
What action compromises the integrity of digital evidence?
An investigator discovers an employee has been viewing inappropriate content at work. Besides collecting digital evidence, what organizational policy should be in place to address this?
An investigator discovers an employee has been viewing inappropriate content at work. Besides collecting digital evidence, what organizational policy should be in place to address this?
An investigator is called to examine a computer for possible evidence, but it is powered on and running. What is the generally recommended first step?
An investigator is called to examine a computer for possible evidence, but it is powered on and running. What is the generally recommended first step?
Flashcards
Digital Forensics
Digital Forensics
The application of computer science and investigative procedures for legal purposes, including analysis, chain of custody, validation, and reporting.
Investigating Digital Devices
Investigating Digital Devices
Collecting data securely, examining it to determine details, presenting it in court, and applying relevant laws.
Digital Forensics vs. Data Recovery
Digital Forensics vs. Data Recovery
Data recovery changes the data; digital forensics keeps the original data intact.
Public-Sector Investigations
Public-Sector Investigations
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Key Elements of Public-Sector Investigations
Key Elements of Public-Sector Investigations
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Beginning a Criminal Investigation
Beginning a Criminal Investigation
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Private-Sector Investigations
Private-Sector Investigations
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Private-Sector Crimes
Private-Sector Crimes
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Acceptable Use Policy
Acceptable Use Policy
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Line of Authority
Line of Authority
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Warning Banners
Warning Banners
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Authorized Requester
Authorized Requester
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Private Investigations
Private Investigations
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Common Situations During Private Investigations
Common Situations During Private Investigations
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Professional Conduct
Professional Conduct
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Role of a Digital Forensics Professional
Role of a Digital Forensics Professional
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Forensic Copy
Forensic Copy
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Bit-stream Image
Bit-stream Image
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Preserve Original Evidence
Preserve Original Evidence
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Deleted Files
Deleted Files
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Final Report
Final Report
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Chain of Custody
Chain of Custody
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Digital Evidence
Digital Evidence
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Evidence Acquisition Procedures
Evidence Acquisition Procedures
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Data Access Challenges
Data Access Challenges
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Forensic Tools
Forensic Tools
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Systematic Approach
Systematic Approach
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Initial Assessment
Initial Assessment
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Preliminary Design
Preliminary Design
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Detailed Checklist
Detailed Checklist
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Copy Evidence Drive
Copy Evidence Drive
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Assessing a Case
Assessing a Case
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Case Details
Case Details
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Basic Investigation Plan
Basic Investigation Plan
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Evidence Custody Form
Evidence Custody Form
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Securing Evidence
Securing Evidence
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Computer-Safe Products
Computer-Safe Products
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Investigation Procedures
Investigation Procedures
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Employee Termination Cases
Employee Termination Cases
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Internet Proxy Server Logs
Internet Proxy Server Logs
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Suspect Computer's IP Address
Suspect Computer's IP Address
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Study Notes
Digital Forensics
- Involves applying computer science and investigative procedures for legal purposes
- Includes analysis of digital evidence after proper search authority, chain of custody, validation using math, validated tools, repeatability, reporting, and expert presentation
Investigation of Digital Devices
- Entails securely collecting data
- Includes examining suspect data to determine details like origin and content
- Focuses on presenting digital information to courts
- Includes applying laws to digital device practices
Digital Forensics vs Data Recovery
- Data recovery changes the date when retrieving data and updating the current state
- Digital forensics preserves data without any changes
- There should be no changes made in digital forensics
Investigations Triad
- A team of forensic investigators
Public-Sector Investigations
- Government agencies handle criminal investigations and prosecution
- The Department of Justice (DOJ) regularly updates computer search and seizure info
- Public-sector investigations necessitate understanding laws on computer-related crimes
Laws for Public Sector
- Standard legal processes
- Guidelines on search and seizure
- How to build a criminal case
Criminal Investigation
- Usually starts when crime evidence is found or witnessed and reported to the police
Police Report
- Police interview the complainant and write a report about the crime
- Report is processed, and management initiates an investigation or logs data in a police blotter that is a historical database of previous crimes
Private-Sector Investigations
- Focus on policy violations
- Private-sector crimes may involve e-mail harassment, data falsification, gender/age discrimination, embezzlement, sabotage, or industrial espionage
- Businesses reduce litigation risks by publishing and maintaining easy-to-read policies
Important Policies
- The most important policies define rules for using company computers/networks
- Acceptable use policy is important, and establishes who can initiate an investigation, take possession of evidence, and access evidence
- Businesses avoid litigation by using warning banners
- Banners include official use notification, monitoring notice, password updates, system updates or external link warnings
Authorized Requester
- Businesses should specify authorized requesters that have the power to initiate investigations
Authority Examples
- Corporate security investigations
- Corporate ethics office
- Internal auditing
- General counsel or legal department
Private Investigation Goals
- Search for evidence to support allegations of violations of company rules or attacks on assets
- Situations include abuse/misuse of computing assets or e-mail/internet abuse
Professional Conduct
- Professional conduct includes ethics, morals, and standards of behavior
- Investigators must show the highest level of professional behavior at all times
- Maintaining objectivity should also maintain the scope and the object
- Maintain credibility by keeping confidentiality and not telling anyone familial
Digital Forensics Role
- Gather evidence to prove a suspect committed a crime or violated company policy
- Focus on collecting evidence that can be offered in court or at a corporate inquiry
- Creating chain of custody by documenting all actions from discovering the crime scene until the case is closed in court
- Case duration is valid for 3 years
Computers as Evidence
- Computers contain information that helps law enforcement establish events leading to crime and provide evidence that can cause a conviction
- Law enforcement should follow proper procedures when acquiring evidence
- A potential challenge is information on hard disks that is password-protected so forensic tools may need to be used in your investigation
Password Protected Challenges
- Encrypted drives
- Big Data
- Cloud Computing
- Corrupted data
- Resource Constraints
- Anti-forensic tools
Systematic Approach for Problem-Solving
- Make an initial assessment about the type of case you are investigating
- Determine a preliminary design or approach to the case
- Create a detailed checklist
- Determine the resources you need
- Obtain and copy an evidence drive
- Identify the risks
- Mitigate or minimize the risks
- Test the design
- Analyze and recover the digital evidence
- Investigate the data you recover
- Complete the case report
- Critique the case; review it to enhance it
Assessing the Case
- Systematically outline case details, including the situation, nature, specifics, evidence type, disk format, and location in order to determine requirements
Basic Investigation Plan
- Prepare a standalone forensic workstation
- Retrieve evidence from the secure container
- Make a forensic copy of the evidence
Evidence Custody
- An evidence custody form documents what has been done with original evidence and its copies
- This is also called a chain-of-evidence form
- Types include a single-evidence form listing each piece of evidence separately or a multi-evidence form with a maximum of 10 items
Evidence Security
- Secure evidence in evidence bags, using computer-safe products like antistatic bags/pads
- Initial tape should verify has not been tampered with
- Consider computer-specific temperature and humidity ranges, also ensure a secure environment for transportation and storage
Private-Sector High-Tech Investigations
- As an investigator, develop formal procedures and checklists
- Ensures all high-tech issues are covered and correct techniques are used
Employee Termination Cases
- Investigative work involves employee abuse of corporate assets
- Incidents creating an aggressive work environment are the main case types
- Employee Termination cases involves workplace content and communications
Internet Abuse
- Organizations must have appropriate policies in place for all employees and workplace equipment
- Internet Abuse investigations involves a proxy server IP and forensic tools
Email Abuse
- Conduct an investigation that contains header data and server logs
Industrial Espionage
- Cases should be treated as criminal investigations, staffed with digital/tech/network investigators and a legal expert
Conducting Industrial Espionage
- This involves gathering all personnel assigned to gather plans and resources
- Survillence
- Discreetly gather any additional evidence and collect log data, reporting to attorneys, and reviewing the scope of investigation
Tech Interviewing
- Skilled interviewer and interrogator can take many years of experience
Interviewing Process
- Interview is conducted to collect information while interrogation attempts a confession
- As a digital investigator, instructing another investigator on what to ask for results
Forensic Lab
- Data recovery workstations and software is conducted in the forensics lab
- Special PC is used to load bays and forensics software
- To avoid altering evidence, use write-blocker devices to boot Windows without writing to the drive
Bit-Stream Copies
- Exact copy of the original disk, differing from simple backup copies that only copy known files
Bit-Stream Image
- Contains the bit-stream copy of data on a disk
- Also known as image or image file, it is copied to target disk
- Forensic Image is a compressed file of a digital evidence replica, preserving all detail including hidden data
Acquiring Image
- First rule of computer forensics is to preserve the original evidence
- Analysis should be done on the evidence copy
- MS-DOS, Linux, and Windows tools are used to acquire image
- Windows tools need a write-blocking device when acquiring FAT or NTFS file systems
Digital Evidence Analyzing
- Extracting deleted and complete files
Completing the Case
- Need to produce the final report, showing repeatable findings and concrete evidence, maintaining journal to refer in court and answer questions
Critiquing the Case
- This involves improve performance, understanding unexpected results, documentation, feedback, problems and techniques
Forensics Lab Info
- Digital forensics lab location: investigation location, evidence storage and equipment location
- Manager duties: managing cases, decision making, fiscality, updates, production schedule and safe workplace
Staff Member Lab Duties
- Knowledge and training, and work is reviewed regularly by the lab manager
- Enlist other managers and create a business plan to sell to clients
- Justification requires marketing and budget for facility, equipment, and software
Approval Implementation
- Implementation involves timeline of delivery and expect completion
- Acceptance includes, security criteria, communications operational testing
Correction Production
- Involves business anticipating operations to go into operations. A business case can not be fully launched without all the following steps being resolved
Digital Forensic Tools
- Identification involves the investigation purpose/resources
- Preservation involves isolution of secured data
- Documentation involves scene, photographs sketching. Presentation, is the summarization
Evaluating Digital Forensics
- Using best open source tools and analyzing which type to run, automations along with the vendor review
- A forensics workstation, is a tool used to copy a suspects image
Tools Tasks
- Data is copied through media with the validation
- Hash verification along with sorting through investigation
- Data is extracted with viewing, searching compress files
- Data is re-created what happened during incidents
- Reporting through the log for analysis
Command-line Forensics
- Command-line Forensics in MS-DOS analyze the early PC tools
- Command-line tools require run in mineral configuraion
Linux Forensic Tool
- Linux has an updated user friendly and includes an easy KDE tool
- Autopsy is for Linux
- A browser for tools use and analyze on site remotely
Additional GUI Forensics Tools
- Easy to simplify training for beginners
- The main advantages are east multitasking and eliminates knowing older version
Disadvantages
- Have excessive requirements, inconsistent results
HardWare Tools
- Involves the rapid technological changes to fail quickly and schedule considers
- The forensic workstations: includes categories what your system handle
Advantage Workstation
- Build of forensic is not difficult with customize for needs
- Can be difficult and also need identifying
Write Blockers
- Write Blockers use a shell code to ideal run in GUI tools and discard data
- Involves connecting from to an OS and testing to prevent damage
Validating Software
- Needs a testing valid prevent damaging and have validation features
Digital Cases
- A digital forensic has up new patches and vendor fixes
- Can do for validations purpose
Digital Crime
- This Includes the general tasks when identifying any digital crime
- Collecting digital is done through systemically
Roles of Understanding
- Following consistent rules to make the right decisions. Understanding these concepts is a requirement to properly perform the duties involved.
- Adhere's computer and standard to be authenticated for use in digital cases
Private Incident
- Private Sector Organizations: includes communication and government sectors
- Follow state laws and document all records available
Corporate Policy Statement Includes
- Analyzing hardware and software
- Conduct surveillance and can access if there digital
- If find commitment can lead to police filing warrants
Investigating Type of OS
- Determining weather can be seized computers and remove devices to a crime scene
Hazard and Team
- A well detailed crime starts with an investigation and identifying potential hazards (radiation)
- Involves having assistance from HAZMAT
- The main leader designate the scenes during collaborations
Additional Tech
- Experts assist throughout scene to ensure it's secure and documented. The use tools and respond quick to prevent loss of possible data.
- Includes assemble reviews to collect secures
- There is always the possibility of volatile items and a loss of data
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