Persistent Asynchronous and Fileless Backdoor

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WMI Event Type - Intrinsic• Intrinsic events are system classes included in everynamespace• Attacker/defender can make a creative use of these• Must be captured at a polling interval. Use carefully.• Possible to miss event firings.__NamespaceOperationEvent__NamespaceModificationEvent__NamespaceDeletionEvent__NamespaceCreationEvent__ClassOperationEvent__ClassDeletionEvent__ClassModificationEvent__ClassCreationEvent__InstanceOperationEvent__InstanceCreationEvent__MethodInvocationEvent__InstanceModificationEvent__InstanceDeletionEvent__TimerEvent
WMI Event Type - Extrinsic• Extrinsic events are non-system classes that fire immediately• No chance of missing these• Generally don’t include as much information• Notable extrinsic events:• Consider the implications…ROOT\CIMV2:Win32_ComputerShutdownEventROOT\CIMV2:Win32_IP4RouteTableEventROOT\CIMV2:Win32_ProcessStartTraceROOT\CIMV2:Win32_ModuleLoadTraceROOT\CIMV2:Win32_ThreadStartTraceROOT\CIMV2:Win32_VolumeChangeEventROOT\CIMV2:Msft_WmiProvider*ROOT\DEFAULT:RegistryKeyChangeEventROOT\DEFAULT:RegistryValueChangeEvent
Page 4 and 5: Fact - Attackers are abusing WMI1.
Page 8: Outline1. Abridged History of WMI M
Page 11 and 12: 2010 - Ghost• Utilized permanent
Page 13 and 14: WMI Basics
Page 15 and 16: WMI Basics - Architecture• WMI im
Page 18 and 19: Interacting with WMI
Page 20 and 21: Utilities - wmic.exe• Pentesters
Page 22 and 23: Utilities - wbemtest.exe• The WMI
Page 24 and 25: Utilities• Linux - wmic, wmis, wm
Page 26 and 27: Remote WMI Protocols - DCOM• DCOM
Page 28 and 29: Remote WMI Protocols - WinRM/PowerS
Page 30 and 31: Remote WMI Protocols - WinRM/PowerS
Page 32 and 33: WMI Eventing
Page 36 and 37: WMI Event - Filters• The definiti
Page 38 and 39: WMI Attacks
Page 40 and 41: WMI - Benefits to an Attacker• Se
Page 42 and 43: WMI Attacks - VM/Sandbox Detection
Page 44 and 45: WMI Attacks - Code Execution and La
Page 46 and 47: WMI Attacks - Data Storage$StaticCl
Page 48 and 49: WMI Attacks - C2 Communication (WMI
Page 50 and 51: WMI Attacks - C2 Communication (Reg
Page 52 and 53: WMI Attacks - Stealthy Command “P
Page 54 and 55: WMI Providers
Page 56 and 57: 3 rd Party WMI Providers• Some 3
Page 58 and 59: WMI Provider Enumeration• Get-Wmi
Page 60 and 61: PoC WMI Backdoor Background• A pu
Page 62 and 63: PoC WMI Backdoor Syntax - New-WMIBa
Page 64 and 65: PoC WMI Backdoor - Examples$Trigger
Page 66 and 67: Attacker Detection with WMI• Pers
Page 68 and 69: Attacker Detection with WMIWMI is t
Page 70 and 71: Mitigations
Page 72 and 73: Thank you!• Valuable input on use

Persistent Asynchronous and Fileless Backdoor

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