122222

Unhooking:

• Disables user-mode function hooks by manually loading ntdll.dll from disk and check for modifications.
• If modifications exist it overwrites with the valid ntdll and calls anti-debug functions based on ntdll from there.
• Todo:Unhooking for every loaded dll

Anti-debugging:

• IsDebuggerPresent()
• PEB.BeingDebugged flag using speculative execution
• PEB.NtGlobalFlag
• Heap Flags
• Self-Debugging
• Anti-Step-Over
• NtSetInformationThread()
• Dynamic TlsCallbacks
• NtQueryInformationProcess()
• RDTSC
• RtlQueryProcessDebugInformation()
• Selectors
• Uses NtTerminateProcess() or SwitchDesktop() or NtShutdownSystem() to terminate/crash the debugging/VM session

Anti-VM:

• CPUID (Hypervisor presence)
  
• CPUID (Hypervisor vendor)
  
• Number of Processors
  
• Device Drivers
  
• NtGetTickCount

Process Injection:

• ANTI automatically migrates in a remote process when it detects a debugger using NtCreateThreadEx technique.

An overview of how ANTI works:

• Idapro, Version 7, 5
• Immunity Debugger, Version 1.85
• OllyDebugger v1.10, v.2
• CheatEngine
• x64dbg, Build Aprl 5 2018
• Windbg 10
• Obsidian debugger, Version 0.11
• Microsoft Visual Studio Debugger, Version 15.4.0
• PhantOm v1.85
• StrongOD v0.4.8.892
• OllyAdvanced v1.27
• SharpOD v0.6
• aadp v0.2
• HideDebugger v1.2.4
• IDA Stealth
• OllyExt
• makin
• ScyllaHide
• Apate
• ApiMonitor v2

• anti.exe <target file> <section name> <pid>

ANTI is licensed under the MIT License.

Credits to Peter Ferrie for his “Ultimate”Anti-Debugging Reference