Public Malware Techniques Used In The Wild - Al-Khaser

al-khaser is a PoC malware with good intentions that aimes to stress your anti-malware system. It performs a bunch of nowadays malwares tricks and the goal is to see if you catch them all.

Possible uses

• You are making an anti-debug plugin and you want to check its effectiveness.
• You want to ensure that your sandbox solution is hidden enough.
• Or you want to ensure that your malware analysis environement is well hidden.

Please, if you encounter any of the anti-analysis tricks which you have seen in a malware, don't hesitate to contribute.

Features

Anti-debugging attacks

• IsDebuggerPresent
• CheckRemoteDebuggerPresent
• Process Environement Block (BeingDebugged)
• Process Environement Block (NtGlobalFlag)
• ProcessHeap (Flags)
• ProcessHeap (ForceFlags)
• NtQueryInformationProcess (ProcessDebugPort)
• NtQueryInformationProcess (ProcessDebugFlags)
• NtQueryInformationProcess (ProcessDebugObject)
• NtSetInformationThread (HideThreadFromDebugger)
• NtQueryObject (ObjectTypeInformation)
• NtQueryObject (ObjectAllTypesInformation)
• CloseHanlde (NtClose) Invalide Handle
• UnhandledExceptionFilter
• OutputDebugString (GetLastError())
• Hardware Breakpoints (SEH / GetThreadContext)
• Software Breakpoints (INT3 / 0xCC)
• Memory Breakpoints (PAGE_GUARD)
• Interrupt 0x2d
• Interrupt 1
• Parent Process (Explorer.exe)
• SeDebugPrivilege (Csrss.exe)
• NtYieldExecution / SwitchToThread

Anti-virtualization

• Virtualbox registry key values artifacts:
  • "HARDWARE\DEVICEMAP\Scsi\Scsi Port 0\Scsi Bus 0\Target Id 0\Logical Unit Id 0 (Identifier)
  • HARDWARE\Description\System (SystemBiosVersion)
  • HARDWARE\Description\System (VideoBiosVersion)
  • HARDWARE\Description\System (SystemBiosDate)
• Virtualbox registry Keys artifacts
  • "HARDWARE\ACPI\RSDT\VBOX__"
  • "HARDWARE\ACPI\FADT\VBOX__"
  • "HARDWARE\ACPI\RSDT\VBOX__"
  • "SOFTWARE\Oracle\VirtualBox Guest Additions"
  • "SYSTEM\ControlSet001\Services\VBoxGuest"
  • "SYSTEM\ControlSet001\Services\VBoxMouse"
  • "SYSTEM\ControlSet001\Services\VBoxService"
  • "SYSTEM\ControlSet001\Services\VBoxSF"
  • "SYSTEM\ControlSet001\Services\VBoxVideo"
• Virtualbox file system artifacts:
  • "system32\drivers\VBoxMouse.sys"
  • "system32\drivers\VBoxGuest.sys"
  • "system32\drivers\VBoxSF.sys"
  • "system32\drivers\VBoxVideo.sys"
  • "system32\vboxdisp.dll"
  • "system32\vboxhook.dll"
  • "system32\vboxmrxnp.dll"
  • "system32\vboxogl.dll"
  • "system32\vboxoglarrayspu.dll"
  • "system32\vboxoglcrutil.dll"
  • "system32\vboxoglerrorspu.dll"
  • "system32\vboxoglfeedbackspu.dll"
  • "system32\vboxoglpackspu.dll"
  • "system32\vboxoglpassthroughspu.dll"
  • "system32\vboxservice.exe"
  • "system32\vboxtray.exe"
  • "system32\VBoxControl.exe"
• Virtualbox directories artifacts:
  • "oracle\virtualbox guest additions\"
• Virtualbox MAC Address:
  • "\x08\x00\x27"
• Virtualbox virtual devices:
  • "\\.\VBoxMiniRdrDN"
  • "\\.\VBoxGuest"
  • "\\.\pipe\VBoxMiniRdDN"
  • "\\.\VBoxTrayIPC"
  • "\\.\pipe\VBoxTrayIPC")
• Virtualbox Windows Class
  • VBoxTrayToolWndClass
  • VBoxTrayToolWnd
• Virtualbox network share
  • VirtualBox Shared Folders
• Virtualbox process list
  • vboxservice.exe
  • vboxtray.exe

Anti Dumping

• Erase PE header from memory

Code/DLL Injections techniques

• CreateRemoteThread
• SetWindowsHooksEx
• NtCreateThreadEx
• RtlCreateUserThread
• APC (QueueUserAPC / NtQueueApcThread)
• RunPE (GetThreadContext / SetThreadContext)

Timing Attacks

• Sleep -> SleepEx -> NtDelayExecution
• SetTimer (Standard Windows Timers)
• timeSetEvent (Multimedia Timers)

Download Al-Khaser