Investigating PowerShell Attacks - Black Hat
Investigating PowerShell Attacks
Black Hat USA 2014 August 7, 2014
PRESENTED BY: Ryan Kazanciyan, Matt Hastings
? Mandiant, A FireEye Company. All rights reserved.
Background Case Study
Attacker Client
Victim VPN
WinRM, SMB,
NetBIOS
Victim workstations, servers
? Fortune 100 organization ? Compromised for > 3 years
? Active Directory ? Authenticated access to
corporate VPN
? Command-and-control via
? Scheduled tasks ? Local execution of
PowerShell scripts ? PowerShell Remoting
? Mandiant, A FireEye Company. All rights reserved.
2
Why PowerShell?
It can do almost anything...
Execute commands Reflectively load / inject code
Enumerate files Interact with services Retrieve event logs
Download files from the internet Interface with Win32 API Interact with the registry Examine processes Access .NET framework
? Mandiant, A FireEye Company. All rights reserved.
3
PowerShell Attack Tools
? PowerSploit
? Reconnaissance ? Code execution ? DLL injection ? Credential harvesting ? Reverse engineering
? Nishang
? Posh-SecMod ? Veil-PowerView ? Metasploit ? More to come...
? Mandiant, A FireEye Company. All rights reserved.
4
PowerShell Malware in the Wild
? Mandiant, A FireEye Company. All rights reserved.
5
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