Tag Archives: security

Hydra – Socket error: Connection reset by peer

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[VERBOSE] Disabled child 2 because of too many errors
[VERBOSE] Disabled child 6 because of too many errors
[ERROR] could not connect to target port 22: Socket error: Connection reset by peer
[ERROR] could not connect to target port 22: Socket error: Connection reset by peer
[ERROR] could not connect to target port 22: Socket error: Connection reset by peer
[ERROR] could not connect to target port 22: Socket error: Connection reset by peer
[ERROR] ssh protocol error

Looks like the issue can happen if you have too many threads going at once. Lower the amount of threads your using with -t. Recommended amount for ssh is 4.

hydra -L usernames.txt  -P "passwords.txt" 192.168.1.20 ssh -t4

Hashcat examples

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Rule based attack

Use a wordlist and best64 rules to try and crack a wordpress hash. Using rockyou.txt as an example.

-m Specifies the hash type

hashcat -m 400 wordpress.hash -r rules/best64.rule wordlist/rockyou.txt

wordpress.hash is a text file that contains the password hash. You can list multiple hashes in the file

Example contents of file

bob@localhost:~$ cat wordpress.hash 
$P$BeJ2ZWVgSx/rR8ifcTFyjq1ouCCWwu0
bob@localhost:~$

Brute force

Attempt every 8 numeric combination for a WPA2 key. 

hashcat -m 2500 -a3 capture.hccapx ?d?d?d?d?d?d?d?d

Hashcat built in Charsets

You can swap out the ?d from the above command with any of the built in character sets below.

  ? | Charset
 ===+=========
  l | abcdefghijklmnopqrstuvwxyz
  u | ABCDEFGHIJKLMNOPQRSTUVWXYZ
  d | 0123456789
  h | 0123456789abcdef
  H | 0123456789ABCDEF
  s |  !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
  a | ?l?u?d?s
  b | 0x00 - 0xff

More information
https://hashcat.net/wiki/doku.php?id=cracking_wpawpa2
Rule based attacks are recommended
https://hashcat.net/wiki/doku.php?id=rule_based_attack

Unable to access old HTTPS login for WiFi router

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Part of the reason some of the older sites do not work is due to insecurities in older SSL protocol’s. Some of the older versions are disabled in newer browsers thereby keeping someone from accessing the device.

Unsupported protocol

Work Around

Internet Explorer will let you change the security settings to allow older security protocols to work. Chrome and Firefox seem to have issues letting you do that.

Open Internet Explorer and then go to the Internet Options and find the Advanced tab. Scroll down and locate the “Use SSL3.0” option and enable it.

Enable SSL 3.0

You may also need to modify the Zones.

Change Internet Zones

You should now be able to accept the Security Certificate and log in.

Proceed to login page for site

This should only be done if absolutely needed and only on sites you trust. It would be a good idea to change the settings back when finished.

More info.
https://community.spiceworks.com/topic/1958251-just-purchased-a-sonicwall-via-ebay-but-after-doing-the-initial-config

Check if Mikrotik is an Open DNS Resolver

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https://www.openresolver.com

You can test if a router is acting as an open DNS resolver by running the following command from a Linux terminal. If you need to install dig, refer to here for Debian/Ubuntu and here for RPM/CentOS/Fedora Distros.

Replace 192.168.88.1 with the host you want to test against.

dig +short test.openresolver.com TXT @192.168.88.1

If you receive the following

"open-resolver-detected"

The router is acting as an open resolver.

If you get 

;; connection timed out; no servers could be reached

Then you are unable to use that router to resolve DNS.

Example running the command against a Mikrotik router with Remote DNS turned on Then adding a firewall rule to block unwanted request.

bob@localhost:~$ dig +short test.openresolver.com TXT @192.168.88.1
"open-resolver-detected"
bob@localhost:~$ 
<<-- Put firewall rule on router -->>
bob@localhost:~$ dig +short test.openresolver.com TXT @192.168.88.1
;; connection timed out; no servers could be reached  
bob@localhost:~$

Extra notes

If you have firewall rules allowing your IP address to use the router for DNS, then the above command to test will show it as an Open Resolver. Ideally you would want a connection from the outside to test. Or you can use this link and test it from the website. https://www.openresolver.com

OpenVas set password for user

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After installing OpenVAS you may need to setup a user. Running the following command will create the user admin and will print the password for the user below.

openvasmd --create-user admin

Example output.

User created with password 'b4539967-c521-fe41-d255-aeb53e735h9a'.

If needed you can delete a user with the following command

openvasmd --delete-user=USERNAME