Question # 1
Miley, a professional hacker, decided to attack a target organization's network. To perform
the attack, she used a tool to send fake ARP messages over the target network to link her
MAC address with the target system's IP address. By performing this, Miley received
messages directed to the victim's MAC address and further used the tool to intercept, steal,
modify, and block sensitive communication to the target system. What is the tool employed
by Miley to perform the above attack?
| | A. Gobbler
| | B. KDerpNSpoof
| | C. BetterCAP
| | D. Wireshark |
Question # 2
To reach a bank web site, the traffic from workstations must pass through a firewall. You
have been asked to review the firewall configuration to ensure that workstations in network
10.10.10.0/24 can only reach the bank web site 10.20.20.1 using https. Which of the
following firewall rules meets this requirement?
| | A. If (source matches 10.10.10.0/24 and destination matches 10.20.20.1 and port matches 443) then permit
| | B. If (source matches 10.10.10.0/24 and destination matches 10.20.20.1 and port matches
80 or 443) then permit
| | C. If (source matches 10.20.20.1 and destination matches 10.10.10.0/24 and port matches
443) then permit
| | D. If (source matches 10.10.10.0 and destination matches 10.20.20.1 and port matches
443) then permit |
A. If (source matches 10.10.10.0/24 and destination matches 10.20.20.1 and port matches 443) then permit
Question # 3
Some clients of TPNQM SA were redirected to a malicious site when they tried to access
the TPNQM main site. Bob, a system administrator at TPNQM SA, found that they were
victims of DNS Cache Poisoning. What should Bob recommend to deal with such a threat?
| | A. The use of security agents in clients’ computers
| | B. The use of DNSSEC
| | C. The use of double-factor authentication
| | D. Client awareness |
Question # 4
An Intrusion Detection System (IDS) has alerted the network administrator to a possibly
malicious sequence of packets sent to a Web server in the network’s external DMZ. The
packet traffic was captured by the IDS and saved to a PCAP file. What type of network tool
can be used to determine if these packets are genuinely malicious or simply a false
positive?
| | A. Protocol analyzer
| | B. Network sniffer
| | C. Intrusion Prevention System (IPS)
| | D. Vulnerability scanner |
Question # 5
A large mobile telephony and data network operator has a data center that houses network
elements. These are essentially large computers running on Linux. The perimeter of the
data center is secured with firewalls and IPS systems.
What is the best security policy concerning this setup? | | A. Network elements must be hardened with user ids and strong passwords. Regular
security tests and audits should be performed.
| | B. As long as the physical access to the network elements is restricted, there is no need for additional measures.
| | C. There is no need for specific security measures on the network elements as long as firewalls and IPS systems exist.
| | D. The operator knows that attacks and down time are inevitable and should have a backup site. |
A. Network elements must be hardened with user ids and strong passwords. Regular
security tests and audits should be performed.
Question # 6
Internet Protocol Security IPsec is actually a suite pf protocols. Each protocol within the
suite provides different functionality. Collective IPsec does everything except.
| | A. Protect the payload and the headers
| | B. Encrypt
| | C. Work at the Data Link Layer
| | D. Authenticate |
Question # 7
John, a professional hacker, decided to use DNS to perform data exfiltration on a target network, in this process, he embedded malicious data into the DNS protocol packets that even DNSSEC cannot detect. Using this technique. John successfully injected malware to bypass a firewall and maintained communication with the victim machine and C&C server. What is the technique employed by John to bypass the firewall?
| | A. DNS cache snooping
| | B. DNSSEC zone walking
| | C. DNS tunneling method
| | D. DNS enumeration |
DNS tunneling may be a method wont to send data over the DNS protocol, a protocol which has never been intended for data transfer. due to that, people tend to overlook it and
it’s become a well-liked but effective tool in many attacks.Most popular use case for DNS
tunneling is obtaining free internet through bypassing captive portals at airports, hotels, or if
you are feeling patient the not-so-cheap on the wing Wi-Fi.On those shared internet
hotspots HTTP traffic is blocked until a username/password is provided, however DNS
traffic is usually still allowed within the background: we will encode our HTTP traffic over
DNS and voilà, we’ve internet access.This sounds fun but reality is, browsing anything on
DNS tunneling is slow. Like, back to 1998 slow.Another more dangerous use of DNS
tunneling would be bypassing network security devices (Firewalls, DLP appliances…) to
line up an immediate and unmonitored communications channel on an organisation’s
network. Possibilities here are endless: Data exfiltration, fixing another penetration testing
tool… you name it.To make it even more worrying, there’s an outsized amount of easy to
use DNS tunneling tools out there.There’s even a minimum of one VPN over DNS protocol
provider (warning: the planning of the web site is hideous, making me doubt on the
legitimacy of it).As a pentester all this is often great, as a network admin not such a lot .
How does it work:For those that ignoramus about DNS protocol but still made it here, i feel
you deserve a really brief explanation on what DNS does: DNS is sort of a phonebook for
the web , it translates URLs (human-friendly language, the person’s name), into an IP
address (machine-friendly language, the phone number). That helps us remember many
websites, same as we will remember many people’s names.For those that know what DNS
is i might suggest looking here for a fast refresh on DNS protocol, but briefly what you
would like to understand is:• A Record: Maps a website name to an IP
address.example.com ? 12.34.52.67• NS Record (a.k.a. Nameserver record): Maps a
website name to an inventory of DNS servers, just in case our website is hosted in multiple
servers.example.com ? server1.example.com, server2.example.comWho is involved in
DNS tunneling?• Client. Will launch DNS requests with data in them to a website .• One
Domain that we will configure. So DNS servers will redirect its requests to an outlined
server of our own.• Server. this is often the defined nameserver which can ultimately
receive the DNS requests.The 6 Steps in DNS tunneling (simplified):1. The client encodes
data during a DNS request. The way it does this is often by prepending a bit of knowledge
within the domain of the request. for instance : mypieceofdata.server1.example.com2. The
DNS request goes bent a DNS server.3. The DNS server finds out the A register of your
domain with the IP address of your server.4. The request for
mypieceofdata.server1.example.com is forwarded to the server.5. The server processes
regardless of the mypieceofdata was alleged to do. Let’s assume it had been an HTTP
request.6. The server replies back over DNS and woop woop, we’ve got signal.
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