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CS6262 Exam Lecture Questions with 100% Correct Verified Answers
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CS6262 Exam Lecture Questions with 100% Correct Verified Answers
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CS6262 Exam Lecture Questions with 100%Correct Verified Answers
Describe four C&C communication structures: - ANSWER IRC Channels: Single point of
failure, easy to locate and take down.
P2P Botnets: Distributed, master servers talk to the bots
Fast Flux DNS: Bots communicate back to a single domain name. The domain name
DNS : IP mapping changes every 10 seconds.
Random Domain Generation:
What tasks do spammers perform? - ANSWER • Build, curate, buy, and sell lists
of email addresses
• Send mail on behalf of other actors for a fee
• Traffic-PPI services looking to acquire traffic and infections
• Phishers looking to steal personal information
What is performed during "footprinting"? - ANSWER • Reconnaissance and information
gathering
• Find out target IP address/phone number range
• Namespace acquisition
• Network Topology (visualRoute)
• Essential to a "surgical" attack
What are common "footprinting" tools? - ANSWER • Google, search engine, Edgar
• Whois
• nslookup, dig, Sam Spade
What is the goal of "scanning"? - ANSWER • Which machine is up and what ports are
open
• Which services are running
, • Their versions and configurations
• Look up corresponding vulnerability info on the web
• Focus on most promising avenues of entry
• Reduce frequency of scanning and randomize the ports or IP addresses to
be scanned in the sequence
What are common tools used in "scanning"? - ANSWER Ping sweep -
Fping, icmpenum, WS_Ping, ProPack, nmap
TCP/UDP port scan - Nmap, superscan,
fscan OS Detection - Nmap, queso, siphon
What is the goal of "enumeration"? - ANSWER • Identify valid user accounts or poorly
protected resource shares
• More intrusive probing than scanning step
What tools are used for "enumeration"? - ANSWER List user accounts: Null
sessions, DumpACL, Sid2usre, onSiteAdmin
List file shares: Showmount, NAT, legion
Identify applications: Banner grabbing with telnet or netcat, rpcinfo
What tools are used for "gaining access"? - ANSWER Password eavesdropping:
tcpdump/ssldump, lophtcrack, readsmb
File share brute force: NAT, legion
Password file grabbing: tftp, pwddump2
Buffer Overflow: ttdb, bind, IIS, .HT/ISM.DLL
How does one gain access? (pen testing) - ANSWER Identify and exploit a vulnerability.
What tools can be used for privilege escalation? - ANSWER Password cracking: John
the ripper, L0phtcrack
Known Exploits: Lc_messages, Getadmin, sechole
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