Persistent Asynchronous and Fileless Backdoor

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WMI Attacks – VM/S<strong>and</strong>box Detection• Sample WQL QueriesSELECT * FROM Win32_ComputerSystem WHERE TotalPhysicalMemory < 2147483648SELECT * FROM Win32_ComputerSystem WHERE NumberOfLogicalProcessors < 2• Example$VMDetected = $False$Arguments = @{Class = 'Win32_ComputerSystem'Filter = 'NumberOfLogicalProcessors < 2 AND TotalPhysicalMemory < 2147483648'}if (Get-WmiObject @Arguments) { $VMDetected = $True }
WMI Attacks – VM/S<strong>and</strong>box Detection (VMware)• Sample WQL QueriesSELECT * FROM Win32_NetworkAdapter WHERE Manufacturer LIKE "%VMware%"SELECT * FROM Win32_BIOS WHERE SerialNumber LIKE "%VMware%"SELECT * FROM Win32_Process WHERE Name="vmtoolsd.exe"SELECT * FROM Win32_NetworkAdapter WHERE Name LIKE "%VMware%“• Example$VMwareDetected = $False$VMAdapter = Get-WmiObject Win32_NetworkAdapter -Filter 'Manufacturer LIKE"%VMware%" OR Name LIKE "%VMware%"'$VMBios = Get-WmiObject Win32_BIOS -Filter 'SerialNumber LIKE "%VMware%"'$VMToolsRunning = Get-WmiObject Win32_Process -Filter 'Name="vmtoolsd.exe"'if ($VMAdapter -or $VMBios -or $VMToolsRunning) { $VMwareDetected = $True }
Page 4 and 5: Fact - Attackers are abusing WMI1.
Page 8: Outline1. Abridged History of WMI M
Page 11 and 12: 2010 - Ghost• Utilized permanent
Page 13 and 14: WMI Basics
Page 15 and 16: WMI Basics - Architecture• WMI im
Page 18 and 19: Interacting with WMI
Page 20 and 21: Utilities - wmic.exe• Pentesters
Page 22 and 23: Utilities - wbemtest.exe• The WMI
Page 24 and 25: Utilities• Linux - wmic, wmis, wm
Page 26 and 27: Remote WMI Protocols - DCOM• DCOM
Page 28 and 29: Remote WMI Protocols - WinRM/PowerS
Page 30 and 31: Remote WMI Protocols - WinRM/PowerS
Page 32 and 33: WMI Eventing
Page 34 and 35: WMI Event Type - Intrinsic• Intri
Page 36 and 37: WMI Event - Filters• The definiti
Page 38 and 39: WMI Attacks
Page 40 and 41: WMI - Benefits to an Attacker• Se
Page 44 and 45: WMI Attacks - Code Execution and La
Page 46 and 47: WMI Attacks - Data Storage$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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