mgeeky

Multi-Stage Penetration-Testing / Red Teaming Malicious Word document creation process

The below paper documents the process of creating a multi-stage IPS/AV transparent malicious document for purposes of Red Teaming / Penetration-Testing assignments.

The resulted document will be:

• using OLE event autorun method
• removing it's pretext shapes
• Obtaining commands to be executed from document's Author property and passing them to StdIn of Powershell.exe process
• Leveraging certutil technique to receive Base64 encoded malicious HTA document
• Having Base64 encoded Powershell command in that Author property

mgeeky

'
' SYNOPSIS:
' 	WMI Persistence method as originally presented by SEADADDY malware
'		(https://github.com/pan-unit42/iocs/blob/master/seaduke/decompiled.py#L887)
' 	and further documented by Matt Graeber.
'
' 	The scheduled command will be launched after roughly 3 minutes since system 
' 	gets up. Also, even if the command shall spawn a window - it will not be visible,
' 	since the command will get invoked by WmiPrvSE.exe that's running in Session 0.
'

mgeeky

Looking for WaitForSingleObject call within modern msfvenom generated payload.

---

Abstract

This is a document explaining how to locate WaitForSingleObject(..., INFINITE) within msfvenom's (4.12.23-dev) generated payload and how to fix the payload's glitches. It goes through the analysis of a windows/shell_reverse_tcp payload, touching issues like stack alignment, WaitForSingleObject locating & patching. It has been written when I realised there are many topics on the Offensive-Security OSCE/CTP forums touching problem of finding this particular Windows API. Since RE is one of my stronger FU's I decided to write down my explanation of the subject.

Contents: