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| Certification Vendor: | EC-Council |
|---|---|
| Exam Name: | EC-Council Digital Forensics Essentials (DFE) |
| Exam Number: | 112-57 |
| Available Languages: | English |
| Recommended Training: | EC-Council Digital Forensics Essentials Training |
| Exam Registration: | EC-Council Official Certification Page |
| Sample Questions: | EC-COUNCIL 112-57 Sample Questions |
| Exam Way: | Online, self-paced training with assessment (EC-Council iLearn platform or authorized delivery partners) |
| Pre Condition: | No formal prerequisites required; basic understanding of cybersecurity is recommended. |
| Official Syllabus URL: | https://www.eccouncil.org/programs/digital-forensics-essentials-dfe/ |
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質問 # 61
Kelly, a professional hacker, used her laptop to perform illegal cyber activities for monetary gain on many victims. She securely locked her laptop using BitLocker software. Using this tool, she locked an entire volume using a secret key to deny access to the system.
Identify the anti-forensic technique used by Don in the above scenario.
正解：D
解説：
The scenario describes the use ofBitLockerto lock an entire disk volume with asecret key, preventing access to the contents. In digital forensics, this is a classic example ofencryption as an anti-forensics technique. Full- disk or full-volume encryption transforms readable data into ciphertext using cryptographic algorithms so that, without the correct key (password, recovery key, TPM-bound protector, etc.), the data is computationally infeasible to interpret. This directly obstructs evidence acquisition and analysis because a forensic image of the drive will largely contain encrypted blocks rather than interpretable file system structures and user data.
This differs from the other options:file carvingis a forensic recovery method (often used by investigators) that reconstructs files from unallocated space; it is not an anti-forensics method used to block access.Artifact wipingattempts to erase traces by deleting or overwriting files, logs, or free space, but it does not inherently prevent access to remaining data if wiping is incomplete.Trail obfuscationinvolves misleading or altering logs and traces to confuse investigators, whereas encryption primarilydenies content visibilityby design. Because BitLocker is explicitly a volume encryption mechanism used here to deny access, the correct anti-forensic technique isEncryption (D).
質問 # 62
Bob, a forensic investigator, is investigating a live Windows system found at a crime scene. In this process, Bob extracted subkeys containing information such as SAM, Security, and software using an automated tool called FTK Imager.
Which of the following Windows Registry hives' subkeys provide the above information to Bob?
正解：D
解説：
In Windows forensics, the Registry is organized into logical root keys ("hives") that aggregate configuration and security data. The items named in the question-SAM,SECURITY, andSOFTWARE-aresystem-wide registry hivesstored on disk (typically under the system's configuration directory) and loaded at runtime underHKEY_LOCAL_MACHINE (HKLM). Investigators rely on these hives because they contain high- value evidence: theSAMhive stores local account database information (including user and group identifiers and credential-related material), theSECURITYhive holds system security policy and LSA-related settings, and theSOFTWAREhive contains installed software, application configuration, and many operating system settings relevant for program execution and persistence analysis.
Tools likeFTK Imagercan extract these hives (or their live-memory representations) during triage to preserve volatile context and enable offline parsing while maintaining evidentiary integrity. The other root keys do not match these specific hives:HKEY_CURRENT_USERis per-user profile data, HKEY_CURRENT_CONFIGreflects current hardware profile, andHKEY_CLASSES_ROOTis primarily file association/COM class mapping (largely derived from HKLM\Software\Classes and HKCU\Software\Classes). Therefore, the correct hive root that provides SAM, SECURITY, and SOFTWARE subkeys isHKEY_LOCAL_MACHINE (B).
質問 # 63
Which of the following Tor relay nodes in the Tor circuit is designed to transfer data in an encrypted format?
正解：B
解説：
In a standard Tor circuit, a client typically builds a three-hop path:Entry/Guard # Middle # Exit. Tor uses onion routing, where the client wraps the payload in multiple encryption layers-one for each hop. Each relay removes (decrypts) only its own layer to learn thenext hop, but not the complete route or the original payload in the clear. Themiddle relayis specifically positioned toforward traffic between the entry/guard and the exit while it remains onion-encrypted end-to-end within the Tor network. Because it neither connects to the user's local network (like the entry/guard) nor to the public destination (like the exit), its primary role isencrypted transit/forwarding, helping break the linkage between source and destination. By contrast, theexit relayis where traffic leaves Tor; unless the application layer uses TLS/HTTPS, the exit may deliver data to the destination inunencryptedform on the open Internet. Theentry/guardprotects against certain traffic-correlation risks by being stable, but it is not uniquely "the" encrypted-transfer node. Therefore, the best single answer isMiddle relay (D).
質問 # 64
James, a forensic specialist, was appointed to investigate an incident in an organization. As part of the investigation, James is attempting to identify whether any external storage devices are connected to the internal systems. For this purpose, he employed a utility to capture the list of all devices connected to the local machine and removed suspicious devices.
Identify the tool employed by James in the above scenario.
正解：C
解説：
The requirement is tolist devices connected to a local Windows machine, specifically to identifyexternal storage devicesthat may be attached and potentially used for data theft or malware introduction. In Windows forensic practice, investigators often start by enumerating currently mounted volumes and recently connected removable media so they can correlate device presence with suspicious activity timelines and user actions.
DriveLetterViewis a utility designed to display the complete mapping ofdrive letters to storage devices
/volumes, includingremovable drives(USB flash drives, external HDDs), optical media, network-mapped drives, and local partitions. It helps quickly identify what storage devices are present and accessible on the system at the time of inspection, which fits the scenario where James captures a list of connected devices and removes suspicious ones.
The other tools do not match this purpose.ESEDatabaseViewis used to inspect Extensible Storage Engine databases, not enumerate attached storage.ProcDumpis used for creating process memory dumps for debugging/forensic analysis of processes, not for listing connected drives.PromiscDetectrelates to detecting network interfaces in promiscuous mode (packet sniffing), not external storage enumeration. Therefore, the correct tool for identifying connected storage devices isDriveLetterView (C).
質問 # 65
Below are the various steps involved in an email crime investigation.
1.Acquiring the email data
2.Analyzing email headers
3.Examining email messages
4.Recovering deleted email messages
5.Seizing the computer and email accounts
6.Retrieving email headers
What is the correct sequence of steps involved in the investigation of an email crime?
正解：C
解説：
In an email crime investigation, the workflow should begin withseizing the computer and email accounts (5)to preserve evidence and prevent alteration, deletion, or continued misuse. This includes securing endpoints and ensuring account access is maintained under proper authority. Next, investigators proceed withacquiring the email data (1)using forensic methods (logical export, mailbox acquisition, or forensic imaging of local mail stores) to maintain integrity and chain of custody.
Once the data is preserved, investigatorsexamine email messages (3)to identify relevant communications, context, attachments, and indicators of fraud, harassment, data leakage, or impersonation. After identifying emails of interest, investigatorsretrieve email headers (6)(full headers, not just what the mail client displays) because headers contain routing metadata required for attribution and timeline reconstruction. They thenanalyze email headers (2)to interpret fields such as Received lines, Message-ID, originating IP clues (where applicable), sending infrastructure, and authentication results, which helps determine spoofing, relay paths, and sender legitimacy. Finally, theyrecover deleted email messages (4)from mail stores, server-side retention, or unallocated space to restore missing evidence. This sequence matches optionA.
質問 # 66
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