When discussing passwords, what is considered a brute force attack?
When discussing passwords, what is considered a brute force attack?
If you would use both brute force and dictionary methods combined together to have variation of words, what wo
In the context of password security, a simple dictionary attack involves loading a dictionary file (a text file full of dictionary words) into a cracking application such as L0phtCrack or John the Ripper, and running it against user accounts located by the application. The larger the word and word fragment selection, the more effective the dictionary attack is. The brute force method is the most inclusive, although slow. It usually tries every possible letter and number combination in its automated exploration. If you would use both brute force and dictionary methods combined together to have variation of words, what would you call such an attack?
What encryption algorithm will you be decrypting?
You are attempting to crack LM Manager hashed from Windows 2000 SAM file. You will be using LM Brute force hacking tool for decryption. What encryption algorithm will you be decrypting?
You want to retrieve the Cisco configuration from the router. How would you proceed?
The network administrator at Spears Technology, Inc has configured the default gateway Cisco router’s access-list as below:
Current configuration : 1206 bytes
!
version 12.3
!
hostname Victim
!
enable secret 5 $1$h2iz$DHYpcqURF0APD2aDuA.YX0
!
interface Ethernet0/0
p address dhcp
p nat outside
alf-duplex
!
interface Ethernet0/1
p address 192.168.1.1 255.255.255.0
p nat inside
alf-duplex
!
router rip
etwork 192.168.1.0
!
ip nat inside source list 102 interface Ethernet0/0 overload
no ip http server
ip classless
!
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 102 permit ip any any
!
snmp-server community public RO
snmp-server community private RW 1
snmp-server enable traps tty
!
line con 0
ogging synchronous
ogin
line aux 0
line vty 0 4
assword secret
ogin
!
!
end
You are hired to conduct security testing on their network. You successfully brute-force the SNMP community string using a SNMP crack tool. The access-list configured at the router prevents you from establishing a successful connection.
You want to retrieve the Cisco configuration from the router. How would you proceed?
Which event log located at c:windowssystem32config contains the trace of your brute force attempts?
You have successfully brute forced basic authentication configured on a Web server using Brutus hacking tool. The username / password is “Admin” and “Bettlemani@”. You logon to the system using the brute forced password and plant backdoors and rootkits.
After downloading various sensitive documents from the compromised machine, you proceed to clear the log files to hide your trace.
Which event log located at c:windowssystem32config contains the trace of your brute force attempts?
What are the alternatives to defending against possible brute-force password attacks on his site?
Samuel is the network administrator of DataX Communications, Inc. He is trying to configure his firewall to block password brute force attempts on his network. He enables blocking the intruder’s IP address for a period of 24 hours time after more than three unsuccessful attempts. He is confident that this rule will secure his network from hackers on the Internet.
But he still receives hundreds of thousands brute-force attempts generated from various IP addresses around the world. After some investigation he realizes that the intruders are using a proxy somewhere else on the Internet which has been scripted to enable the random usage of various proxies on each request so as not to get caught by the firewall rule.
Later he adds another rule to his firewall and enables small sleep on the password attempt so that if the password is incorrect, it would take 45 seconds to return to the user to begin another attempt. Since an intruder may use multiple machines to brute force the password, he also throttles the number of connections that will be prepared to accept from a particular IP address.
This action will slow the intruder’s attempts.
Samuel wants to completely block hackers brute force attempts on his network.
What are the alternatives to defending against possible brute-force password attacks on his site?