Wylie Bayes

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OpenBSD Powershell Blog

Alternate Data Streams, and Extended File System Attributes.

Wylie Bayes Wylie Bayes
Alternate data streams (ADS) are an NTFS file system only capability to be able to add data onto an additional "Stream" of a file without altering the contents of the file itself, or modify it's hash value in anyway.   First we are going to create a new file, and add some data into it.  This can be any type of file, or an already existing file as long as it resides on an NTFS partition. Creating a new file, adding…
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AlienVault OTX(Online Threat Exchange) - Powershell IoC Collector

AlienVault OTX(Online Threat Exchange) - Powershell IoC Collector

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So I wanted to automate IoC(Indicators of Compromise) collection and discovered AlienVault OTX product. I work in a primarily windows workstation environment and Powershell is my goto language for just about everything since since it is native on every system since Windows 7. Below is a script I developed to gather indicators from all subscribed pulses on OTX with powershell. It gathers each indicator by type, IE: IPv4, URL, Hostname etc, and then exports each seperate indicator type into…
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Abusing Tenable Nessus / Security Center with Audit Files and Powershell. #Nessus #Infosec #ExploitDelivery #RBACBypass #InsiderThreat

Powershell • Blog
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Title: Abuse of Tenable Nessus/Security Center with Audit Files and Powershell. Class: Exploit Delivery System/RBAC Bypass/Insider Abuse/Pivot Vector. Signed PDF with Keybase PGP key Wylie's PGPKey Date Published: 2017-07-27 Last Update: 2017-06-22 Vendors contacted: Tenable Network Security - https://www.tenable.com 2016-12-05 - First notification sent by Wylie Bayes to Tenable Consultant Jack Daniel. 2016-12-07 - Acknowledgement of first notification received from Tenable team. 2017-01-04 - Sent follow up email for progress update to Tenable…
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OpenBSD -current IPv6 Router. Clients: #Windows, #Android, #Linux, #Openbsd. Xfinity/Comcast cable internet. Native #IPv6

OpenBSD -current IPv6 Router. Clients: #Windows, #Android, #Linux, #Openbsd. Xfinity/Comcast cable internet. Native #IPv6

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So this is a follow up article revisiting using native Comcast(Xfinity) internet with your OpenBSD router provide IPv6 connectivity to all of your devices on your LAN. I first attempted this around OpenBSD 5.4, and had moderate success, but there were still some bugs to be worked out. Now that we are up to OpenBSD 6.1, things seem to be much more refined! This has been fully tested through 6.4 and on -current 6.5 snapshots…
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Quick and dirty #Powershell forward and reverse #whois.

Blog • Powershell
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Just a real quick way to do whois lookups on domains, and IP addresses, in Powershell. Forward lookup uses Webservicex.net, and reverse uses Arin.net. function whois($site) { #Syntax: whois google.com $web = New-WebServiceProxy ‘http://www.webservicex.net/whois.asmx?WSDL’ $web.GetWhoIs("$($site)") } function rwhois($ip){ #syntax: whois 8.8.8.8 $baseURL = 'http://whois.arin.net/rest' $url = "$baseUrl/ip/$ip" $r = Invoke-RestMethod $url $r.net } Cheers!…
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Checking #Lastpass saved sites for #Cloudflare with #Powershell. #Cloudbleed #Infosec

Blog • Powershell
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So as everyone already knows there was a huge leak of data for months for websites who use Cloudflare services. To make my changing of passwords a bit easier, and more focused / targeted I put together a little setup to check all of my Lastpass saved sites for Cloudflare name servers. First I exported my Lastpass information to a .txt format from their website export feature. Then I used a quick and dirty parsing -replace feature of powershell to clean…
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#VMWare Killing Stuck, or Hung tasks with #Powershell #PowerCLI

Blog • Powershell
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Recently I ran into an issue where a Powered Off VM was stuck in a vMotion host migration for over 3 days. I assume that the VM was powered off during the migration, which is what caused it to hang. Afterwards two backup job snapshot tasks were also in queue on top of the migration task. I spent about 10-15 minutes in the GUI trying to find how to kill or stop this task, unsuccessfully. The only option I could…
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Adventures with Hyper-V, Information Security, Route Hijack, Exfiltration, and Compromise. #HyperV #Microsoft #Compromise #Exfiltration

Blog
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Microsoft has confirmed there is a mitigation already in place by going to settings for a VM go to Network Adapter -> Advanced Features -> DHCP Guard and enable it. "It is not disabled by default due to it being a performance impact"? I personally powershell to just disable DHCP on the interface. Like: "Set-NetIpInterface -ifindex 2 -Dhcp Disabled, where ifindex 2" where ifindex is the "Internal" vSwitch type. The goal of…
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Fix windows unquoted service path enumeration vulnerabilities with #Powershell

Powershell • Blog
Wylie Bayes Wylie Bayes
Here is a function to fix windows unquoted service path enumeration vulnerabilities automatically with powershell! Cheers! function fix-servicepath { $hosts = get-content C:\Users\*****\Documents\WindowsPowershell\Servers.txt foreach ($box in $hosts) {     $services = $null     $services = get-wmiobject win32_service -computername $box     foreach ($service in $services){ $Displayname = $service.DisplayName        if (($service.PathName -like "* *") -and ($service.Pathname -notlike '"*"*') -and ($service.PathName -like '*.exe')) {         $box         $service.PathName         write-host "Changing Path to be quoted:"         $NewPath = $service.Pathname         $newservicepath…
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