Analyzing Indicators of Compromise Flashcards
Which of the following Linux commands will show you how much disk space is in use?
A. top
B. df
C. lsof
D. ps
Answer:
B. The df command will show you a system’s current disk utilization. Both the top command and the ps command will show you information about processes, CPU, and memory utilization, whereas lsof is a multifunction tool for listing open files.
What Windows tool provides detailed information including information about USB host controllers, memory usage, and disk transfers?
A. statmon
B. resmon
C. perfmon
D. winmon
Answer:
C. Perfmon, or Performance Monitor, provides the ability to gather detailed usage statistics for many items in Windows. Resmon, or Resource Monitor, monitors CPU, memory, and disk usage, but does not provide information about things like USB host controllers and other detailed instrumentation. Statmon and winmon are not Windows built-in tools.
What type of network information should you capture to be able to provide a report about how much traffic systems in your network sent to remote systems?
A. Syslog data
B. WMI data
C. Resmon data
D. Flow data
Answer:
D. Flow data provides information about the source and destination IP address, protocol, and total data sent and would provide the detail needed. Syslog, WMI, and resmon data is all system log information and would not provide this information.
Which of the following technologies is best suited to prevent wired rogue devices from connecting to a network?
A. NAC
B. PRTG
C. Port security
D. NTP
Answer:
A. Network access control (NAC) can be set up to require authentication. Port security is limited to recognizing MAC addresses, making it less suited to preventing rogue devices. PRTG is a monitoring tool, and NTP is the network time protocol.
As part of her job, Danielle sets an alarm to notify her team via email if her Windows server uses 80 percent of its memory and to send a text message if it reaches 90 percent utilization. What is this setting called?
A. A monitoring threshold
B. A preset notification level
C. Page monitoring
D. Perfmon calibration
Answer:
A. A monitoring threshold is set to determine when an alarm or report action is taken. Thresholds are often set to specific values or percentages of capacity.
Chris wants to use an active monitoring approach to test his network. Which of the following techniques is appropriate?
A. Collecting NetFlow data
B. Using a protocol analyzer
C. Pinging remote systems
D. Enabling SNMP
Answer:
C. Active monitoring is focused on reaching out to gather data using tools like ping and iPerf. Passive monitoring using protocol analyzers collects network traffic and router-based monitoring using SNMP, and flows gather data by receiving or collecting logged information.
What term describes a system sending heartbeat traffic to a botnet command and control server?
A. Beaconing
B. Zombie ping
C. CNCstatus
D. CNClog
Answer:
A. Beaconing activity (sometimes called heartbeat traffic) occurs when traffic is sent to a botnet command and control system. The other terms are made up.
Cameron wants to be able to detect a denial-of-service attack against his web server. Which of the following tools should he avoid?
A. Log analysis
B. Flow monitoring
C. iPerf
D. IPS
Answer:
C. Log analysis, flow monitoring, and deploying an IPS are all appropriate solutions to help detect denial-of-service attacks. iPerf is a performance testing tool used to establish the maximum bandwidth available on a network connection.
What can the MAC address of a rogue device tell you?
A. Its operating system version
B. The TTL of the device
C. What type of rogue it is
D. The manufacturer of the device
Answer:
D. Hardware vendor ID codes are part of MAC addresses and can be checked for devices that have not had their MAC address changed. It is possible to change MAC addresses, so relying on only the MAC address is not recommended.
How can Jim most effectively locate a wireless rogue access point that is causing complaints from employees in his building?
A. Nmap
B. Signal strength and triangulation
C. Connecting to the rogue AP
D. NAC
Answer:
B. Locating a rogue AP is often best done by performing a physical survey and triangulating the likely location of the device by checking its signal strength. If the AP is plugged into the organization’s network, nmap may be able to find it, but connecting to it is unlikely to provide its location (or be safe!). NAC would help prevent the rogue device from connecting to an organizational network but won’t help locate it.
Which of the following tools does not provide real-time drive capacity monitoring for Windows?
A. Microsoft Endpoint Configuration Manager
B. Resmon
C. SCOM
D. Perfmon
Answer:
A. Microsoft Endpoint Configuration Manager provides non-real-time reporting for disk space. Resmon, perfmon, and SCOM can all provide real-time reporting, which can help to identify problems before they take a system down.
What three options are most likely to be used to handle a memory leak?
A. Memory management, patching, and buffer overflow prevention
B. Patching, service restarts, and system reboots
C. Service restarts, memory monitoring, and stack smashing prevention
D. System reboots, memory management, and logging
Answer:
B. The best way to deal with memory leaks is to patch the application or service. If a patch is not available, restarting the service or the underlying operating system is often the only solution. Buffer overflow and stack smashing prevention both help deal with memory-based attacks rather than memory leaks, and monitoring can help identify out-of-memory conditions but don’t directly help deal with a memory leak.
Sayed is planning to prohibit a variety of files, including games, from being installed on the Windows workstations he manages. What technology is his best option to prevent known, unwanted files from being installed or copied to machines?
A. Blacklisting
B. Microsoft Endpoint Configuration Manager
C. SCOM
D. Whitelisting
Answer:
A. A blacklisting application or tool can allow Sayed to specifically prevent specific files or applications from being installed. Microsoft Endpoint Configuration Manager could be used to uninstall files, and SCOM could be used to monitor machines for files, but neither is as well suited. Whitelisting works in the opposite manner by listing allowed files.
While Susan is monitoring a router via network flows, she sees a sudden drop in network traffic levels to zero, and the traffic chart shows a flat line. What has likely happened?
A. The sampling rate is set incorrectly.
B. The router is using SNMP.
C. The monitored link failed.
D. A DDoS attack is occurring.
Answer:
C. The most likely answer is that the link has failed. Incorrectly set sampling rates will not provide a good view of traffic, and a DDoS attack is more likely to show large amounts of traffic. SNMP is a monitoring tool and would not result in flow data changing.
What are SNMP alert messages called?
A. SNMP launches
B. SNMP traps
C. SNMP bolts
D. SNMP packets
Answer:
B. SNMP alerts are called SNMP traps, and they are sent from endpoints to a central management system or collector where they are typically stored and analyzed. The rest of the answers were made up for this question.
