ECCouncil 312-49v11 (Computer Hacking Forensic Investigator) Practice Test 14

Question 130

A USB drive from an untrusted source may contain autorun or exploit code. Which handling practice protects analysis infrastructure?

  1. Chain-of-custody transfer
  2. Tamper-evident seal
  3. Evidence quarantine
  4. Documentation of deviations

Explanation

Correct Answer

C:

Quarantine uses controlled examination hosts, disabled automatic execution, and approved workflow to isolate potential hazards. Simply copying the files into a normal office workstation is unsafe.

Incorrect Answers

A:

A case involving who possessed the device at each transfer might use this approach: a custody transfer log identifies the item, releasing and receiving parties, date, time and purpose; the required result here is limiting exposure from malicious evidence media. Each handover extends the documented possession history for later scrutiny; it cannot replace proof about limiting exposure from malicious evidence media.

B:

The required finding is about limiting exposure from malicious evidence media; tamper-evident packaging provides visible indications of opening when correctly applied and inspected; this addresses the separate concern of physical evidence of package opening. It does not establish that digital bytes remained unchanged before sealing; it does not by itself answer limiting exposure from malicious evidence media.

D:

For an analysis centered on visibility into collection errors and workarounds, a deviation log captures errors, tool settings, retries and skipped sectors so later readers can interpret image completeness; the present need is limiting exposure from malicious evidence media. A successful final hash does not restore unreadable source sectors; a different finding about limiting exposure from malicious evidence media is still needed.

Question 131

Several seized phones must remain protected from unapproved physical access overnight. Which safeguard is most appropriate?

  1. Secure evidence locker
  2. Evidence inventory
  3. Unique evidence identifier
  4. Chain-of-custody transfer

Explanation

Correct Answer

A:

Controlled evidence storage uses restricted access, entry records and environmental precautions appropriate to devices. Encryption safeguards contents but cannot account for who handled a phone.

Incorrect Answers

B:

For the separate question of a complete list of collected case exhibits, an evidence inventory lists every item, identifiers, origin and location, helping reconcile collected materials against custody and case records; the requested assessment of physical security and accountability for seized devices remains open. It does not replace technical analysis of the items; there is no direct finding about physical security and accountability for seized devices.

C:

The objective here is physical security and accountability for seized devices; a unique evidence identifier ties each item to photographs, device serials, collection notes and custody entries; the option would instead inform unambiguous association of each seized drive. Similar appearance or capacity is inadequate for reliable exhibit tracking; it is not direct evidence of physical security and accountability for seized devices.

D:

For a separate investigation of who possessed the device at each transfer, a custody transfer log identifies the item, releasing and receiving parties, date, time and purpose; that is not the determination of physical security and accountability for seized devices in the stem. Each handover extends the documented possession history for later scrutiny; the evidence still must speak to physical security and accountability for seized devices.

Question 132

The team collects memory dumps, printed notes and removable media at three locations. Which document provides a consolidated accounting?

  1. Unique evidence identifier
  2. Collection contemporaneous notes
  3. Evidence inventory
  4. Original-versus-working copy

Explanation

Correct Answer

C:

An evidence inventory lists every item, identifiers, origin and location, helping reconcile collected materials against custody and case records. It does not replace technical analysis of the items.

Incorrect Answers

A:

Instead of a method addressing a complete list of collected case exhibits, a unique evidence identifier ties each item to photographs, device serials, collection notes and custody entries; this one concerns unambiguous association of each seized drive. Similar appearance or capacity is inadequate for reliable exhibit tracking; it cannot independently determine a complete list of collected case exhibits.

B:

In work concerning the scene before investigative intervention, contemporaneous photographs and written notes record screen contents, connections, time and actions while conditions are observable; the operation would not resolve a complete list of collected case exhibits. Memory reconstructed after collection is less reliable; the distinction leaves a complete list of collected case exhibits unsettled.

D:

The required finding is about a complete list of collected case exhibits; use a validated working copy for iterative analysis while retaining the original acquisition under controlled, read-only storage; this addresses the separate concern of protecting the master acquisition during examination. Derived files should be traceable back to the verified master; it does not by itself answer a complete list of collected case exhibits.

Question 133

An analyst wants to parse a forensic disk image repeatedly while keeping the acquired master unchanged. Which practice should be used?

  1. Collection contemporaneous notes
  2. Unique evidence identifier
  3. Original-versus-working copy
  4. Tamper-evident seal

Explanation

Correct Answer

C:

Use a validated working copy for iterative analysis while retaining the original acquisition under controlled, read-only storage. Derived files should be traceable back to the verified master.

Incorrect Answers

A:

The current inquiry asks about protecting the master acquisition during examination; contemporaneous photographs and written notes record screen contents, connections, time and actions while conditions are observable; this mechanism chiefly addresses the scene before investigative intervention. Memory reconstructed after collection is less reliable; it cannot prove protecting the master acquisition during examination on its own.

B:

In an inquiry concerning unambiguous association of each seized drive, a unique evidence identifier ties each item to photographs, device serials, collection notes and custody entries; the scope does not extend to protecting the master acquisition during examination. Similar appearance or capacity is inadequate for reliable exhibit tracking; that issue cannot settle protecting the master acquisition during examination.

D:

For the separate question of physical evidence of package opening, tamper-evident packaging provides visible indications of opening when correctly applied and inspected; the requested assessment of protecting the master acquisition during examination remains open. It does not establish that digital bytes remained unchanged before sealing; there is no direct finding about protecting the master acquisition during examination.

Question 134

During imaging, a drive produces read errors and the operator changes settings to finish. What record is essential?

  1. Chain-of-custody transfer
  2. Evidence inventory
  3. Evidence quarantine
  4. Documentation of deviations
  5. Tamper-evident seal

Explanation

Correct Answer

D:

A deviation log captures errors, tool settings, retries and skipped sectors so later readers can interpret image completeness. A successful final hash does not restore unreadable source sectors.

Incorrect Answers

A:

For questions about who possessed the device at each transfer, a custody transfer log identifies the item, releasing and receiving parties, date, time and purpose; that differs from visibility into collection errors and workarounds. Each handover extends the documented possession history for later scrutiny; it provides no direct answer to visibility into collection errors and workarounds.

B:

The stem asks about visibility into collection errors and workarounds; an evidence inventory lists every item, identifiers, origin and location, helping reconcile collected materials against custody and case records; the described operation is used for a complete list of collected case exhibits. It does not replace technical analysis of the items; a determination about visibility into collection errors and workarounds requires other support.

C:

Instead of a method addressing visibility into collection errors and workarounds, quarantine uses controlled examination hosts, disabled automatic execution, and approved workflow to isolate potential hazards; this one concerns limiting exposure from malicious evidence media. Simply copying the files into a normal office workstation is unsafe; it cannot independently determine visibility into collection errors and workarounds.

E:

A case involving physical evidence of package opening might use this approach: tamper-evident packaging provides visible indications of opening when correctly applied and inspected; the required result here is visibility into collection errors and workarounds. It does not establish that digital bytes remained unchanged before sealing; it cannot replace proof about visibility into collection errors and workarounds.

Question 135

A closed case contains devices that cannot yet be returned because appeals remain possible. Which step controls their final release?

  1. Unique evidence identifier
  2. Documentation of deviations
  3. Evidence disposition authorization
  4. Chain-of-custody transfer

Explanation

Correct Answer

C:

Evidence disposition follows documented authorization, applicable holds and approved return or destruction procedures. Case closure alone may not terminate retention obligations.

Incorrect Answers

A:

For an analysis centered on unambiguous association of each seized drive, a unique evidence identifier ties each item to photographs, device serials, collection notes and custody entries; the present need is lawful and approved release of retained exhibits. Similar appearance or capacity is inadequate for reliable exhibit tracking; a different finding about lawful and approved release of retained exhibits is still needed.

B:

When the investigative task is visibility into collection errors and workarounds, a deviation log captures errors, tool settings, retries and skipped sectors so later readers can interpret image completeness; that differs from the question about lawful and approved release of retained exhibits. A successful final hash does not restore unreadable source sectors; that leaves lawful and approved release of retained exhibits unresolved.

D:

In an inquiry concerning who possessed the device at each transfer, a custody transfer log identifies the item, releasing and receiving parties, date, time and purpose; the scope does not extend to lawful and approved release of retained exhibits. Each handover extends the documented possession history for later scrutiny; that issue cannot settle lawful and approved release of retained exhibits.

Question 136

An examiner needs a modern cryptographic fingerprint of a forensic image for later comparison. Which method is suitable?

  1. Hash manifest
  2. Read error handling
  3. SHA-256 evidence digest
  4. Hash collision caution

Explanation

Correct Answer

C:

SHA-256 creates a fixed-length digest that changes with nearly any content modification and is widely used for integrity checks. A matching digest supports byte-level consistency but not lawful acquisition.

Incorrect Answers

A:

For a separate investigation of verification of every transferred file, a manifest containing filenames, relevant paths and cryptographic digests permits per-file validation; that is not the determination of checking the integrity of acquired bytes in the stem. An overall folder name cannot detect a changed individual member reliably; the evidence still must speak to checking the integrity of acquired bytes.

B:

With checking the integrity of acquired bytes as the investigative issue, read-error maps and substituted byte ranges must accompany the image, because those bytes do not represent recovered original data; the result would concern provenance of missing sectors in a disk image. Downstream interpretation must not present filler as authentic content; this would not resolve checking the integrity of acquired bytes.

D:

The stem asks about checking the integrity of acquired bytes; a hash identifies content probabilistically and provides no author identity or provenance; the described operation is used for the difference between byte similarity and authorship. Even strong hashes cannot establish who created the data; collisions are theoretically possible; a determination about checking the integrity of acquired bytes requires other support.

Question 137

One case requires verification that a newly created disk image matches its source; another requires validating each document in a transferred collection. Which TWO methods are specifically suited to those different integrity checks? Choose TWO.

  1. Hash manifest
  2. Timestamp authority
  3. MD5 legacy compatibility
  4. Source-image verification
  5. Read error handling

Explanation

Correct Answers

A:

In this combined inquiry, a manifest containing filenames, relevant paths and cryptographic digests permits per-file validation; an overall folder name cannot detect a changed individual member reliably. This addresses verification of every transferred file.

D:

In this combined inquiry, compute appropriate digests over comparable source and image byte ranges and compare results, accounting for any documented read errors; different scope or unreadable sectors can invalidate a naive equality test. This addresses confirming image content matches acquired source bytes.

Incorrect Answers

B:

Although the case asks about both confirming image content matches acquired source bytes and verification of every transferred file, a trusted timestamp can bind a digest to a recorded time using a separate authority; the action instead concerns independent timing of a recorded cryptographic digest. It demonstrates that the digest existed by that time, not necessarily when the underlying file originated; it does not establish both confirming image content matches acquired source bytes and verification of every transferred file.

C:

For an analysis centered on integrity records compatible with a legacy workflow, record the legacy digest where necessary and calculate a modern algorithm such as SHA-256 as well; the present need is both confirming image content matches acquired source bytes and verification of every transferred file. MD5 has known collision weaknesses, especially for adversarial authenticity claims; a different finding about both confirming image content matches acquired source bytes and verification of every transferred file is still needed.

E:

The current inquiry asks about both confirming image content matches acquired source bytes and verification of every transferred file; read-error maps and substituted byte ranges must accompany the image, because those bytes do not represent recovered original data; this mechanism chiefly addresses provenance of missing sectors in a disk image. Downstream interpretation must not present filler as authentic content; it cannot prove both confirming image content matches acquired source bytes and verification of every transferred file on its own.

Question 138

A folder contains renamed executables, and investigators want to find ones matching a known malware specimen. Which technique helps?

  1. Hash collision caution
  2. MD5 legacy compatibility
  3. Signed acquisition record
  4. SHA-256 evidence digest
  5. Hash-based file identification

Explanation

Correct Answer

E:

Comparing content digests identifies exact byte matches independently of file names or extensions. A changed build or repackaged file will not match the original digest.

Incorrect Answers

A:

For the separate question of the difference between byte similarity and authorship, a hash identifies content probabilistically and provides no author identity or provenance; the requested assessment of identifying a known binary despite a renamed filename remains open. Even strong hashes cannot establish who created the data; collisions are theoretically possible; there is no direct finding about identifying a known binary despite a renamed filename.

B:

The objective here is identifying a known binary despite a renamed filename; record the legacy digest where necessary and calculate a modern algorithm such as SHA-256 as well; the option would instead inform integrity records compatible with a legacy workflow. MD5 has known collision weaknesses, especially for adversarial authenticity claims; it is not direct evidence of identifying a known binary despite a renamed filename.

C:

For a separate investigation of whether an acquisition report has been altered since signing, a digital signature can bind report bytes to a controlled private key and permit integrity/authenticity checks; that is not the determination of identifying a known binary despite a renamed filename in the stem. It does not prove every factual assertion in the report is correct; the evidence still must speak to identifying a known binary despite a renamed filename.

D:

With identifying a known binary despite a renamed filename as the investigative issue, SHA-256 creates a fixed-length digest that changes with nearly any content modification and is widely used for integrity checks; the result would concern checking the integrity of acquired bytes. A matching digest supports byte-level consistency but not lawful acquisition; this would not resolve identifying a known binary despite a renamed filename.

Question 139

A trainee argues that two files sharing a cryptographic digest prove they were created by the same person. What principle corrects this?

  1. Hash collision caution
  2. Timestamp authority
  3. MD5 legacy compatibility
  4. Hash-based file identification

Explanation

Correct Answer

A:

A hash identifies content probabilistically and provides no author identity or provenance. Even strong hashes cannot establish who created the data; collisions are theoretically possible.

Incorrect Answers

B:

A case involving independent timing of a recorded cryptographic digest might use this approach: a trusted timestamp can bind a digest to a recorded time using a separate authority; the required result here is the difference between byte similarity and authorship. It demonstrates that the digest existed by that time, not necessarily when the underlying file originated; it cannot replace proof about the difference between byte similarity and authorship.

C:

The required finding is about the difference between byte similarity and authorship; record the legacy digest where necessary and calculate a modern algorithm such as SHA-256 as well; this addresses the separate concern of integrity records compatible with a legacy workflow. MD5 has known collision weaknesses, especially for adversarial authenticity claims; it does not by itself answer the difference between byte similarity and authorship.

D:

Although the case asks about the difference between byte similarity and authorship, comparing content digests identifies exact byte matches independently of file names or extensions; the action instead concerns identifying a known binary despite a renamed filename. A changed build or repackaged file will not match the original digest; it does not establish the difference between byte similarity and authorship.

Question 140

A legacy case system stores only MD5 checksums, but a new acquisition requires stronger assurance. Which practice balances comparability and security?

  1. MD5 legacy compatibility
  2. SHA-256 evidence digest
  3. Source-image verification
  4. Hash-based file identification

Explanation

Correct Answer

A:

Record the legacy digest where necessary and calculate a modern algorithm such as SHA-256 as well. MD5 has known collision weaknesses, especially for adversarial authenticity claims.

Incorrect Answers

B:

Even though the scenario needs integrity records compatible with a legacy workflow, SHA-256 creates a fixed-length digest that changes with nearly any content modification and is widely used for integrity checks; the action relates to checking the integrity of acquired bytes. A matching digest supports byte-level consistency but not lawful acquisition; this remains insufficient for integrity records compatible with a legacy workflow.

C:

For the separate question of confirming image content matches acquired source bytes, compute appropriate digests over comparable source and image byte ranges and compare results, accounting for any documented read errors; the requested assessment of integrity records compatible with a legacy workflow remains open. Different scope or unreadable sectors can invalidate a naive equality test; there is no direct finding about integrity records compatible with a legacy workflow.

D:

The objective here is integrity records compatible with a legacy workflow; comparing content digests identifies exact byte matches independently of file names or extensions; the option would instead inform identifying a known binary despite a renamed filename. A changed build or repackaged file will not match the original digest; it is not direct evidence of integrity records compatible with a legacy workflow.

Computer Hacking Forensic Investigator (312-49v11) Practice Tests