GASF 試験問題と解答 - 模擬練習 - 練習問題・模擬試験

Question No : 1
When examining the iOS device shown below the tool indicates that there are 4 chat messages recovered

A.Memory ranges from a physical dump of the device
B.Databases installed and maintained by the application
C.Internet history plist files found in logical acquisitions
D.IP connections used by the application

正解:

Question No : 2
Which of the following is the term for the SMS malware that sends text messages to a premium number generating large service bills for the user of the targeted device?

A.Trojan
B.Adware
C.Potentially unwanted applications
D.Click bait

正解:
Explanation:
Reference: https://pdfs.semanticscholar.org/7f33/9156f47345bd102c9b05f45f9bfe4c182720.pdf

Question No : 3
Which of the following files provides the most accurate reflection of the device’s date/timestamp related to the last device wipe?

A./private/var/mobile/Library/AddressBook/AddressBook.sqlitedb
B./private/var/mobile/Applications/com.apple.mobilesafari/Library/history.db
C./private/var/mobile/Applications/com.viber/Library/Prefernces/com.viber.plist
D./private/var/mobile/Applications/net.whatsapp.WhatsApp/Library/pw.dat

正解:

Question No : 4
Which of the following is a unique 56 bit number assigned to a CDMA handset?

A.Mobile Station International Subscriber Directory Number (MSISDN)
B.Electronic Serial Number (ESN)
C.International Mobile Equipment Identifier (IMEI)
D.Mobile Equipment ID (MEID)

正解:
Explanation:
The Mobile Equipment ID (MEID), also found under the battery cover, is a 56 bit number which replaced the ESN due to the limited number of 32 bit ESN numbers. The MEID is listed in hex, where the first byte is a regional code, next three bytes are a manufacturer code, and remaining three bytes are a manufacturer-assigned serial number. Reference: https://sites.google.com/site/bbayles/index/cdma_hardware_id

Question No : 5
Where can an analyst find data to provide additional artifacts to support the evidence in the highlighted file?

A.internal.db-wal
B.browser2.db
C.sysmon2.db-shm
D.external.db

正解:

Question No : 6
The files pictured below from a BlackBerry OS10 file system have a unique file extension.

What can be concluded about these files?

A.Files are protected by the file system, so changing the file system makes them less accessible
B.Files are encrypted to prevent them from being viewed without the decryption key
C.Files are encoded for secure transmitting of data
D.Files are located on a media card so they contain a unique file extension

正解:
Explanation:
Reference: https://forums.crackberry.com/blackberry-q10-f272/protected-media-911023/

Question No : 7
Physical Analyzer provides a function to narrow down a search based on a timestamp, a type, a party or date.
What is the name of this advanced searching capability?

A.Watchlist Editor
B.Tags
C.Timeline
D.Event of Interest

正解:
Explanation:
Physical Analyzer offers the Timeline feature to narrow down what happened on the smartphone during a specific time, type, party, etc. This is commonly used to narrow down time periods. Data that is manually carved will not be shown here. There is also an option to create a custom timeline specification.

Question No : 8
An Android device user is known to use Facebook to communicate with other parties under examination. There is no evidence of the Facebook application on the phone.
If there was Facebook usage where would an examiner expect to find these artifacts?

A.com.android.chrome/app_chrome/Default/Local Storage
B.dmappmgr.db
C./data/system/packages.xml
D.AndroidManifest.xml

正解:
Explanation:
Reference: https://www.ctsforensics.com/assets/news/35550_Web-update.pdf

Question No : 9
In 2015, Apple’s iTunes store was found to be hosting several malicious applications that were infected as a result of hacked version of the developer toolkit used to create applications.
Which Apple developer suite was targeted?

A.Xcode
B.ADB
C.Momentics IDE
D.Xamarin

正解:
Explanation:
Reference: http://money.cnn.com/2015/09/21/technology/apple-xcode-hack/index.html

Question No : 10
Which of the following is required in addition to the Apple ID of the custodian to access IOS backup files that are stored in ICloud?

A.iTunes password
B.Device passcode
C.Manifest.plist
D.Keychain-backup.plist

正解:

Question No : 11
Cellebrite Physical Analyzer uses Bit Defender to scan for malware by flagging files who have known bad hash values.
This is an example of which type of mobile malware detection?

A.Specific-based malware detection
B.Signature-based detection
C.Behavioral-based detection
D.Cloud based malware detection

正解:
Explanation:
Reference: https://security.stackexchange.com/questions/95186/what-is-the-precise-difference-between-asignature-based-vs-behavior-based-antiv

Question No : 12
When conducting forensic analysis of an associated media card, one would most often expect to find this particular file system format?

A.HFS
B.NTFS
C.Yaffs2
D.FAT

正解:

Question No : 13
Which artifact must be carved out manually when examining a file system acquisition of an Android device?

A.Deleted images
B.Contacts
C.SMS messages
D.Phone numbers

正解:

Question No : 14
As part of your analysis of a legacy BlackBerry device, you examine the installed applications list and it appears that no third-party applications were installed on the device.
Which other file may provide you with additional information on applications that were accessed with the handset?

A.BlackBerry NV Items
B.Content Store
C.Event logs
D.BBThumbs.dat

正解:
Explanation:
Analyzing both the Event Logs (which are accessible in Oxygen Forensic Suite) and/or the Installed Applications (which is a feature available in Cellebrite Physical Analyzer) may lead you to additional data. If applications of interest were located in the Event Logs, a Keyword Search across the media may reveal more data related to the application.

Question No : 15
An analyst investigating a Nokia S60 Symbian device wants to know if an Adobe Flash file on the handset is compromised.

Which file in the image will best target the Adobe Flash files?

A.FLASHLIT
B.sis
C.flashliteplugin.r03
D.saflash.r01
E.OnlinePrint.sis

正解:
Explanation:
A sis.file is the package that Symbian uses to install applications on their OS compatible handsets. Knowing that you are investigating an application that is installed on the handset, first narrowing the files down to installer packages, or *.sis files, is a good starting point. Flash is an Adobe product making the most logical of the two remaining* .sis files for review, the FLASHLITE installer package. There are several other files related to “Flash” but as resource files, they provide supporting documentation and will not contain the .app file or code that was possibly malicious.

GIAC GASF 問題練習