GIAC GIAC Information Security GCED Questions & Answers

• Question 71:

  Which of the following attacks would use ".." notation as part of a web request to access restricted files and directories, and possibly execute code on the web server?

  A. URL directory

  B. HTTP header attack

  C. SQL injection

  D. IDS evasion

  E. Cross site scripting

  Correct Answer: A

• Question 72:

  At the start of an investigation on a Windows system, the lead handler executes the following commands after inserting a USB drive. What is the purpose of this command? C:\ >dir / s / a dhsra d: \ > a: \ IRCD.txt

  A. To create a file on the USB drive that contains a listing of the C: drive

  B. To show hidden and archived files on the C: drive and copy them to the USB drive

  C. To copy a forensic image of the local C: drive onto the USB drive

  D. To compare a list of known good hashes on the USB drive to files on the local C: drive

  Correct Answer: C

  Explanation: This command will create a text file on the collection media (in this case you would probably be using a USB flash drive) named IRCD.txt that should contain a recursive directory listing of all files on the desk.

• Question 73:

  Why might an administrator not be able to delete a file using the Windows del command without specifying additional command line switches?

  A. Because it has the read-only attribute set

  B. Because it is encrypted

  C. Because it has the nodel attribute set

  D. Because it is an executable file

  Correct Answer: A

• Question 74:

  Why would the pass action be used in a Snort configuration file?

  A. The pass action simplifies some filtering by specifying what to ignore.

  B. The pass action passes the packet onto further rules for immediate analysis.

  C. The pass action serves as a placeholder in the snort configuration file for future rule updates.

  D. Using the pass action allows a packet to be passed to an external process.

  E. The pass action increases the number of false positives, better testing the rules.

  Correct Answer: A

  Explanation: The pass action is defined because it is sometimes easier to specify the class of data to ignore rather than the data you want to see. This can cut down the number of false positives and help keep down the size of log data. False positives occur because rules failed and indicated a threat that is really not one. They should be minimized whenever possible. The pass action causes the packet to be ignored, not passed on further. It is an active command, not a placeholder.

• Question 75:

  To detect worms and viruses buried deep within a network packet payload, Gigabytes worth of traffic content entering and exiting a network must be checked with which of the following technologies?

  A. Proxy matching

  B. Signature matching

  C. Packet matching

  D. Irregular expression matching

  E. Object matching

  Correct Answer: C

• Question 76:

  When identifying malware, what is a key difference between a Worm and a Bot?

  A. A Worm gets instructions from an external control channel like an IRC server.

  B. A Worm, unlike a Bot, is installed silently as an add-on to a legitimate program.

  C. A Bot, unlike a Worm, is frequently spread through email attachments.

  D. A Bot gets instructions from an external control channel like an IRC server.

  Correct Answer: D

• Question 77:

  Monitoring the transmission of data across the network using a man-in-the-middle attack presents a threat against which type of data?

  A. At-rest

  B. In-transit

  C. Public

  D. Encrypted

  Correct Answer: B

• Question 78:

  Which type of media should the IR team be handling as they seek to understand the root cause of an incident?

  A. Restored media from full backup of the infected host

  B. Media from the infected host, copied to the dedicated IR host

  C. Original media from the infected host

  D. Bit-for-bit image from the infected host

  Correct Answer: A

  Explanation: By imaging the media with tools such as dd or Ghost and analyzing the copy, you preserve the original media for later analysis so that the results can be recreated by another competent examiner if necessary.

• Question 79:

  An incident response team is handling a worm infection among their user workstations. They created an

  IPS signature to detect and block worm activity on the border IPS, then removed the worm's artifacts or

  workstations triggering the rule.

  Despite this action, worm activity continued for days after. Where did the incident response team fail?

  A. The team did not adequately apply lessons learned from the incident

  B. The custom rule did not detect all infected workstations

  C. They did not receive timely notification of the security event

  D. The team did not understand the worm's propagation method

  Correct Answer: B

  Explanation: Identifying and scoping an incident during triage is important to successfully handling a security incident. The detection methods used by the team didn't detect all the infected workstations.

• Question 80:

  A legacy server on the network was breached through an OS vulnerability with no patch available. The server is used only rarely by employees across several business units. The theft of information from the server goes unnoticed until the company is notified by a third party that sensitive information has been posted on the Internet. Which control was the first to fail?

  A. Security awareness

  B. Access control

  C. Data classification

  D. Incident response

  Correct Answer: C

  Explanation: The legacy system was not properly classified or assigned an owner. It is critical that an organization identifies and classifies information so proper controls and measures should be put in place. The ultimate goal of data classification is to make sure that all information is properly protected at the correct level.

  This was not a failure of incident response, access control or security awareness training.