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README.md
README.md
 
 
SSL-TLS-Handshake-reference
SSL-TLS-Handshake-reference
 
 
Stingray-vtm-99-log-TLS-version
Stingray-vtm-99-log-TLS-version
 
 
WSUS-config-commands
WSUS-config-commands
 
 
bash_request_url_maker
bash_request_url_maker
 
 
client-hello-tools-python
client-hello-tools-python
 
 
disk-usage-analysis
disk-usage-analysis
 
 
dump_failover_config_windows.ps1
dump_failover_config_windows.ps1
 
 
fstab_mod.sh
fstab_mod.sh
 
 
get-distro
get-distro
 
 
get_fails.sh
get_fails.sh
 
 
keepalive.js
keepalive.js
 
 
lvm-vg2scsi-channel
lvm-vg2scsi-channel
 
 
mongodb_recovery_wt
mongodb_recovery_wt
 
 
mysql-list-database-sizes
mysql-list-database-sizes
 
 
nmap-cipher-script
nmap-cipher-script
 
 
powercli-vmware-snapshots.ps1
powercli-vmware-snapshots.ps1
 
 
powershell-get-os-info
powershell-get-os-info
 
 
powershell-promote-to-dc
powershell-promote-to-dc
 
 
powershell-shortcuts
powershell-shortcuts
 
 
pull-wsus-config
pull-wsus-config
 
 
rpm-erase-noscripts
rpm-erase-noscripts
 
 
secure_log_whois_parser.sh
secure_log_whois_parser.sh
 
 
sysvinit-conditional
sysvinit-conditional
 
 
tcpdump-capture-headers
tcpdump-capture-headers
 
 
traceroute-whois
traceroute-whois
 
 
wannacry
wannacry
 
 

Repository files navigation

https://media.giphy.com/media/xUNd9VQFbvTmLZT7YA/giphy.gif

Linux and Windows Scripts and One-liners

Anything overtly dangerous, I have tried to comment as such. Most of the other things included here are read only commands or scripts that could be useful depending on the situation

Stingray VTM Log TLS Version (TS)

#Example script, that sends the string to log.info:
#Get the encryption cipher
$cipher = ssl.clientCipher(); 
log.info( "Encrypted with ".$cipher );

Python script for debugging TLS connections, specifically "client-hello"

#!/usr/bin/env python
# Hack-and-slash derived from https://github.com/pquerna/tls-client-hello-stats

import os, sys, dpkt
TLS_HANDSHAKE = 22

def pcap_reader(fp):
    return dpkt.pcap.Reader(fp)

def grab_negotiated_ciphers(cap):
    for ts, buf in cap:
        eth = dpkt.ethernet.Ethernet(buf)
        if not isinstance(eth.data, dpkt.ip.IP):
            continue
        ip = eth.data
        if not isinstance(ip.data, dpkt.tcp.TCP):
            continue

        tcp = ip.data
        if (tcp.dport != 443 and tcp.sport != 443) or (len(tcp.data) <= 0) or (ord(tcp.data[0]) != TLS_HANDSHAKE):
            continue

        records = []
        try:
            records, bytes_used = dpkt.ssl.TLSMultiFactory(tcp.data)
        except dpkt.ssl.SSL3Exception, e:
            continue
        except dpkt.dpkt.NeedData, e:
            continue

        if len(records) <= 0:
            continue

        for record in records:
            # TLS handshake only
            if (record.type == 22 and len(record.data) != 0 and ord(record.data[0]) == 2):
                try:
                    handshake = dpkt.ssl.TLSHandshake(record.data)
                except dpkt.dpkt.NeedData, e:
                    continue
                if isinstance(handshake.data, dpkt.ssl.TLSServerHello):
                    ch = handshake.data
                    print '%s\t0x%0.2x,0x%0.2x' %(dpkt.ssl.ssl3_versions_str[ch.version], (ch.cipher_suite&0xff00)>>8, ch.cipher_suite&0xff)
                else:
                    continue

def main(argv):
    if len(argv) != 2:
        print "Tool to grab and print TLS Server Hello cipher_suite"
        print ""
        print "Usage: parser.py <pcap file>"
        print ""
        sys.exit(1)

    with open(argv[1], 'rb') as fp:
        capture = pcap_reader(fp)
        stats = grab_negotiated_ciphers(capture)

if __name__ == "__main__":
    main(sys.argv)

Linux Disk Usage Analysis

#!/bin/bash
#
#Run this inside the parent directory, it will read recursively...
#
FS='./';resize;clear;date;df -h $FS; echo "Largest Directories:"
#so we don't bury the machine running these read heavy commands
nice -n19 find $FS -mount -type d -print0 2>/dev/null|xargs -0 du -k|sort -runk1|head -n20|awk '{printf "%8d MB\t%s\n",($1/1024),$NF}'
#output to standard out
echo "Largest Files:"
#probably a better way to do this, but again we nice it so we don't bury the machine in io
nice -n 19 find $FS -mount -type f -print0 2>/dev/null| xargs -0 du -k | sort -rnk1| head -n20 |awk '{printf "%8d MB\t%s\n",($1/1024),$NF}'

above as one-liner

FS='./';resize;clear;date;df -h $FS; echo "Largest Directories:"; nice -n19 find $FS -mount -type d -print0 2>/dev/null|xargs -0 du -k|sort -runk1|head -n20|awk '{printf "%8d MB\t%s\n",($1/1024),$NF}';echo "Largest Files:"; nice -n 19 find $FS -mount -type f -print0 2>/dev/null| xargs -0 du -k | sort -rnk1| head -n20 |awk '{printf "%8d MB\t%s\n",($1/1024),$NF}';

Windows dump failover configuration

# Ugly script that gathers cluster info for 
# Failover Cluster manager in Server 2012
# Failover ip's and the network configuration are both dropped into a backup file
# Cluster configuration is dropped into a separate file
#
# This probably should have been done better...
#
#
ipconfig /all | Out-File C:\Users\administrator\Downloads\ipconfig_pre.txt
Get-ClusterResource | where {$_.resourcetype -eq "IP Address"} | format-list | Out-File C:\Users\administrator\Downloads\ipconfig_pre.txt -Append
Import-Module -Name FailoverClusters
Get-Cluster | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt
Get-ClusterAccess | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterNode | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterQuorum | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterGroup | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterResource | Sort-Object -Property OwnerGroup, Name | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterResource | Sort-Object -Property OwnerGroup, Name | Get-ClusterResourceDependency | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append
Get-ClusterResource | Get-ClusterOwnerNode | Where-Object -FilterScript { $_.OwnerNodes.Count -ne ( Get-ClusterNode ).Count } | Format-List | Out-File C:\Users\Administrator\Downloads\cluster_info.txt -Append

Linux LVM - translate Volume Group to scsi channel

echo "connected disks" > /root/disks.txt; echo "physical volumes" > /root/physical_volumes.txt; ls -ld /sys/block/sd*/device | awk '{print$9}' | cut -d \/ -f 4 >> /root/disks.txt; pvs | awk '{print$1}' | cut -d \/ -f 3 | sort >> /root/physical_volumes.txt; diff -y /root/disks.txt /root/physical_volumes.txt

alternate formatted version, thanks to Jeff V.

echo -en 'DISK\t\tVG\n-----\t\t--\n' ; for i in /sys/block/sd*/device; do echo -n $(ls -ld $i | cut -d'/' -f 4,8 | sed 's/\// /gi') ; echo -ne '\t' ; pvs | tail -n +2 | grep $(echo $i | cut -d'/' -f4) | awk '{print $2}' ; echo ; done

output should look like:

#   DISK            VG
#   -----           --
#   sda 2:0:0:0
#   sdb 2:0:1:0     os

Windows Enable UAC

Set-ItemProperty -Path HKLM:\Software\Microsoft\Windows\CurrentVersion\policies\system -Name EnableLUA -Value 1 
Set-ItemProperty -Path HKLM:\Software\Microsoft\Windows\CurrentVersion\policies\system -Name ConsentPromptBehaviorAdmin -Value 4

Linux - mysql - list sizes of all databases in instance this is a read HEAVY query and should only be run off-production hours

mysql>SELECT table_schema AS "Database name", SUM(data_length + index_length) / 1024 / 1024 AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema;

use this to list count by name w/o getting sizes

SELECT count(*) FROM information_schema.SCHEMATA WHERE schema_name NOT IN ('mysql','information_schema');

Linux - nmap - list supported ciphers on endpoint BE CAREFUL WITH NMAP, BECAUSE IF YOU DON'T KNOW WHAT YOU ARE DOING, YOU CAN VERY EASILY START TRIGGERING ALARMS BY SCANNING HOSTS WITH RECKLESS ABANDON. THE BELOW IS SAFE BECAUSE YOU ARE EXPLICITY DEFINING THE PORT, SO THE CONNECTION IS EFFECTIVELY THE SAME AS THE TLS HANDSHAKE THAT TAKES PLACE DURING AT THE BEGINNING OF ANY HTTPS CONNECTION. DO NOT JUST RUN NMAP AGAINST A HOST IN OUR NETWORK WITHOUT ANY FLAGS. AT BEST SOC WILL COME TELL YOU TO STOP. the below uses nmap to "scan" for supported ciphers on a specific host, using a specific port (in this case 443)

nmap --script ssl-enum-ciphers -p 443 <ip address>

Powershell Get OS info

systeminfo | findstr /B /C:"OS Name" /C:"OS Version"

Powershell Promote to Domain Controller

#
# Windows PowerShell script for AD DS Deployment
#
Import-Module ADDSDeployment
Install-ADDSForest `
-CreateDnsDelegation:$false `
-DatabasePath "C:\Windows\NTDS" `
-DomainMode "Win2012R2" `
-DomainName "rogue-2.local" `
-DomainNetbiosName "ROGUE-2" `
-ForestMode "Win2012R2" `
-InstallDns:$true `
-LogPath "C:\Windows\NTDS" `
-NoRebootOnCompletion:$false `
-SysvolPath "C:\Windows\SYSVOL" `
-Force:$true

Linux Hot CPU add (system doesn't recognize hot added CPU's) check for any CPU's listed as "NO" for "online"

lscpu -a --extended

output should give you something like:

[root@LAB01-01 ~]# lscpu -a --extended
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE
0 0 0 0 0:0:0:0 yes
1 0 1 1 1:1:1:1 yes
2 - - - ::: no
3 - - - ::: no

then use the below to online the CPU(s)

echo 1 > /sys/devices/system/cpu/cpu2/online

Linux Debugging website response times stolen from https://gist.github.com/manifestinteractive/ce8dec10dcb4725b8513

\n
=============  HOST:  ==========\n
\n
           local_ip:  %{local_ip}\n
         local_port:  %{local_port}\n
          remote_ip:  %{remote_ip}\n
        remote_port:  %{remote_port}\n
\n
=======  CONNECTION:  ==========\n
\n
       http_version:  %{http_version}\n
          http_code:  %{http_code}\n
       http_connect:  %{http_connect}\n
       num_connects:  %{num_connects}\n
      num_redirects:  %{num_redirects}\n
       redirect_url:  %{redirect_url}\n
\n
=============  FILE:  ==========\n
\n
       content_type:  %{content_type}\n
 filename_effective:  %{filename_effective}\n
     ftp_entry_path:  %{ftp_entry_path}\n
      size_download:  %{size_download}\n
        size_header:  %{size_header}\n
       size_request:  %{size_request}\n
        size_upload:  %{size_upload}\n
     speed_download:  %{speed_download}\n
       speed_upload:  %{speed_upload}\n
  ssl_verify_result:  %{ssl_verify_result}\n
      url_effective:  %{url_effective}\n
\n
===  TIME BREAKDOWN:  ==========\n
\n
    time_appconnect:  %{time_appconnect}\n
       time_connect:  %{time_connect}\n
    time_namelookup:  %{time_namelookup}\n
   time_pretransfer:  %{time_pretransfer}\n
      time_redirect:  %{time_redirect}\n
 time_starttransfer:  %{time_starttransfer}\n
                      ----------\n
         time_total:  %{time_total}\n
\n

stick the above somewhere it can be referenced later

#drop this in your .bash_profile
alias sniff='curl -w "@/Users/pbryant/sniff.txt" -o /dev/null -s'

example output:

C02JD2ZDDKQ5:~ pbryant$ sniff google.com

=============  HOST:  ==========

           local_ip:  127.0.0.1
         local_port:  53409
          remote_ip:  172.217.9.174
        remote_port:  80

=======  CONNECTION:  ==========

curl: unknown --write-out variable: 'http_version'
       http_version:  
          http_code:  301
       http_connect:  000
       num_connects:  1
      num_redirects:  0
       redirect_url:  http://www.google.com/

=============  FILE:  ==========

       content_type:  text/html; charset=UTF-8
 filename_effective:  /dev/null
     ftp_entry_path:  
      size_download:  219
        size_header:  321
       size_request:  74
        size_upload:  0
     speed_download:  2853.000
       speed_upload:  0.000
  ssl_verify_result:  0
      url_effective:  HTTP://google.com/

===  TIME BREAKDOWN:  ==========

    time_appconnect:  0.000
       time_connect:  0.015
    time_namelookup:  0.014
   time_pretransfer:  0.015
      time_redirect:  0.000
 time_starttransfer:  0.077
                      ----------
         time_total:  0.077

C02JD2ZDDKQ5:~ pbryant$

check if sysVinit service is running using exit code, then performance a conditional action

if [[ -z $(/etc/init.d/MyService status) ]]; then echo "MyService is down "; else echo "MyService is up "; fi;

powershell get version of windows OS in readable format

(Get-WmiObject -class Win32_OperatingSystem).Caption

Ubuntu 10.04 get ip's from interface

INTERFACE_LABEL=eth0
ip addr | grep 'inet ' | grep $INTERFACE_LABEL | awk '{print$2}' | cut -d "/" -f 1

DDOS Attack - Grab and Parse Traffic

###1 - Dump traffic out: 
tcpdump -i eth0 dst port 80 or dst port 443 -nn > /root/dump.txt
###2 - Parse dump for top 50 source ip's by total recieved requests
cat /root/dump.txt | awk '{print$3}' | cut -d "." -f 1-4 | sort | uniq -c | sort -rn | head -n 50

Parsing Apache Logs

##LAMP - Plesk - Ubuntu
##Top 20 Source Ip's
##1 - old logs are usually in .processed: 
find /var/www/vhosts/. -name access_log.processed -exec grep 'DD/Mon/YEAR:time' {} \; | awk '{print$1}' | sort | uniq -c | sort -rn | head -n 20
##2 - current logs are usually in access_log
find /var/www/vhosts/. -name access_log -exec grep 'DD/Mon/YEAR:time' {} \; | awk '{print$1}' | sort | uniq -c | sort -rn | head -n 20
##Top 20 Requests
find /var/www/vhosts/. -name access_log.processed -exec grep 'DD/Mon/YEAR:time' {} \; | awk '{print$7}' | sort | uniq -c | sort -rn | head -n 20
##3 - Loop through and count total lines by hour into standard out: 
n=0;while [ $n -le 9 ];do echo $n"am CDT";find /var/www/. -name access.log -exec grep "02/May/2016:0$n" {} \; | wc -l;n=$(( n+1 )); done

Powershell WSUS Usefuls

##Get Current Status
Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\" | Format-List -Property WUServer,WUStatusServer
Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU\" | Format-List -Property UseWUServer, AUOptions, DetectionFrequencyEnabled,DetectionFrequency,ScheduledInstallDay,ScheduledInstallTime, AlwaysAutoRebootAtScheduledTime, AlwaysAutoRebootAtScheduledTimeMinutes
##Update values
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\" -Name WUServer -Value 'http://wsus.example.com'
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\" -Name WUStatusServer -Value 'http://wsus.example.com'

Powershell Dump Cluster IP's (troubleshooting ip conflict errors)

Get-ClusterResource | where {$_.resourcetype -eq "IP Address"} | ft -wrap -autosize

Linux remove block device from machine

echo 1 >  /sys/class/scsi_device/h:c:t:l/device/delete

ip address regex match

(\d{1,3}\.){3}\d{1,3}

pull source ip ssh login failures from secure logs

grep "failure;" /var/log/secure | awk -F "=" '{print$7}' | awk '{print$1}' | sort | uniq -c | sort -rn

***reboot from bash init

echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger

get status of dd while it's still running #dd will listen for a signal to display progress. you can send this signal using kill directly to the pid

kill -USR1 $(pgrep ^dd)

***Traceroute Whois***

traceroute to endpoint using regular icmp traceroute, then pull OriginAS and NetName from whois from each hop

[root@fedora-lab ~]# traceroute -n google.com > trace.txt; for i in $(awk '{print$2}' trace.txt | grep -v '*' | grep -v 'to'); do echo $i; whois $i | grep OriginAS; whois $i | grep NetName; done 68.183.64.254 OriginAS: NetName: DO-13 138.197.250.170 OriginAS: NetName: DIGITALOCEAN-16 209.85.175.196 OriginAS: NetName: GOOGLE 108.170.252.1 OriginAS: AS15169 NetName: GOOGLE 74.125.37.125 OriginAS: NetName: GOOGLE 172.217.18.14 OriginAS: AS15169 NetName: GOOGLE [root@fedora-lab ~]#

response time with curl stolen from https://blog.josephscott.org/2011/10/14/timing-details-with-curl/

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sysadmin toolbox

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linux bash tls http brocade powershell https rpm header yum nmap df vtm stingray tcpdump powershell-scripts lvm scsi du failover-manager

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