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DA 101 - Protecting your Domain Admin Account

At SynerComm's Fall IT Summit 2018 we presented a talk about the top 5 attacks used to compromise a Domain Administrator account. The AssureIT team put together a list of tools to help you check for these vulnerabilities in your network.

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OpenSSH < 7.7 - Username Enumeration Exploit

On August 15th, 2018 a vulnerability was posted on the OSS-Security list. This post explained that OpenSSH (all versions prior to and including 7.7) is vulnerable to username enumeration by sending a malformed public key authentication request (SSH2_MSG_USERAUTH_REQUEST with type publickey) to the service.

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Thoughts on Blocking Powershell.exe

Defenders do not view the world of infosec through the eyes of a determined, skilled attacker. They view the world through the quantity and quality of tickets generated by their SIEM (if they have one). It is true that a determined, skilled attacker (read and understand that) can work around a correctly implemented PowerShell block. One such method is to drop an exe to disk call a dlls.

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How to build a 8 GPU password cracker

This build doesn't require any "black magic" or hours of frustration like desktop components do. If you follow this blog and its parts list, you'll have a working rig in 3 hours. These instructions should remove any anxiety of spending 5 figures and not knowing if you'll bang your head for days.

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The Upside Down - Ventures into the 5GHZ Spectrum

In the hit Netflix series 'Stranger Things', the Upside Down is the parallel dimension inhabited by a monster. It is a dark and cold reflection of the dimension inhabited by humans, containing the same locations and infrastructure. When assessing wireless networks, I like to think of 5GHZ as 'the upside down'; a dark and cold spectrum where assessors have historically had limited visibility to see what is lurking within when compared to its 2.4GHZ peer.

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spin-up: Quickly Launch a Provisioned EC2 Attack Server

When on an engagement, sometimes we'll encounter an eager blue team hellbent on identify and blocking our attacks. Typical in those instances we'd use proxy-cannon and route through multiple (ever changing) Amazon EC2 hosts.  However, what if you send shells back to a host that is easily "burnable". Introducing spin-up: A quick tool used designed to provision EC2 hosts on the fly for engagements where you want quick listener in the cloud.

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Luckystrike: An Evil Office Document Generator.

 Luckystrike is a PowerShell based generator of malicious .xls documents (soon to be .doc). All your payloads are saved into a database for easy retrieval & embedding into a new or existing document. Luckystrike provides you several infection methods designed to get your payloads to execute without tripping AV. See the "Installation" section below for instructions on getting started.

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The Number One Pentesting Tool You're Not Using

Reporting sucks, rarely does anyone enjoy it. Serpico is a tool that helps with reporting and makes it suck less through collaboration and automation, saving you time that you’d rather spend pentesting. Serpico is easy to install and works out of the box, yet highly customizable. Automating AND customizing your reports has never been more painless.

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Invoke-SMBAutoBrute.ps1 - Smart SMB Brute Forcing

One of my favorite post-ex metasploit modules is smb_login. It's great for running a quick test using credentials you've discovered. One of the problems with it is that there is nothing that prevents you from locking out accounts. Plus, you have to create user list which means dumping users | cut | sed | awk, blah blah blah.

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Weaponizing Nessus

Once in a blue moon we come across a client that has truly done security right (or at least, tried really hard to do so). All the low hanging fruit has been trimmed: Responder doesn't work, no passwords in GPP, all systems patched up to date, no Spring2016 passwords, etc. As frustrating as this is for pentesters, it forces us to level up our game.

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