ScyllaHide is an open-source x64/x86 usermode Anti-Anti-Debug library. It hooks various functions in usermode to hide debugging. This will stay usermode! For kernelmode hooks use TitanHide.

ScyllaHide is tested to work with VMProtect, Themida, Armadillo, Execryptor, Obsidium If you find any protector that still detects debugger, please tell us.

Source code license: GNU General Public License v3 https://www.gnu.org/licenses/gpl-3.0.en.html

Debugger Hiding:

• PEB - BeingDebugged, NtGlobalFlag, Heap Flags
• NtSetInformationThread - ThreadHideFromDebugger
• NtQuerySystemInformation - SystemKernelDebuggerInformation, SystemProcessInformation
• NtQueryInformationProcess - ProcessDebugFlags, ProcessDebugObjectHandle, ProcessDebugPort, ProcessBasicInformation, ProcessBreakOnTermination, ProcessHandleTracing
• NtSetInformationProcess - ProcessBreakOnTermination, ProcessHandleTracing
• NtQueryObject - ObjectTypesInformation, ObjectTypeInformation
• NtYieldExecution
• NtSetDebugFilterState
• NtUserBuildHwndList - EnumWindows
• NtUserFindWindowEx - FindWindowA/W, FindWindowExA/W
• NtUserQueryWindow
• NtClose
• NtCreateThreadEx
• BlockInput
• Remove Debug Privileges
• OutputDebugStringA - OutputDebugStringW

Timing Hooks:

• GetTickCount
• GetTickCount64
• GetLocalTime
• GetSystemTime
• NtQuerySystemTimeHook
• NtQueryPerformanceCounter

Special functions:

• Prevent Thread creation - for protectors like Execryptor. Only use if you know what you are doing !
• Malware RUNPE Unpacker - Hooks NtResumeThread and terminates + dumps the process created by malware
• Kill Anti-Attach

Protecting and Stealthing DRx (Hardware Breakpoints):

• NtGetContextThread
• NtSetContextThread
• KiUserExceptionDispatcher (only x86)
• NtContinue (only x86)

Hooks:

• Stealth hooks for 32-bit targets (Tested against Themida/VMProtect)

Plugin specific:

• Update-Check IDA:
• DLL injection (stealth / normal)
• IDA 64bit plugin
• IDA 32/64bit remote server Olly1&2:
• Change Olly title
• Resume/Suspend all Threads in Thread window
• DLL injection (stealth / normal) Olly1:
• Fix PE-Bugs
• Fix FPU Bug
• x64 compatibility mode
• Remove EP-Break
• Break on TLS
• Skip "EP outside code" message
• Advanced CTRL+G
• Skip "compressed code" message
• Ignore bad PE image (WinUPack)
• Skip "Load DLL" message

Usage standalone (debugger-independent): InjectorCLI.exe

For example: InjectorCLI.exe crackme.exe C:\HookLibrary.dll

Plugins:

• for TitanEngine: Copy HookLibrary.dll and ScyllaHide.dll to plugins\x86\ or plugins\x64\ (can be combined with TitanHide which does kernelmode hiding)
• for OllyDbg v1.10: Copy HookLibraryx86.dll and ScyllaHideOlly1.dll to your plugins directory
• for OllyDbg v2.01: Copy HookLibraryx86.dll and ScyllaHideOlly2.dll to your plugins directory
• for IDA v6 32bit: Copy HookLibraryx86.dll, NtApiCollection.ini, ScyllaHideIDASrvx86.exe and ScyllaHideIDA.plw to your plugins directory
• for IDA v6 64bit: Copy ScyllaHideIDA.p64, NtApiCollection.ini, ScyllaHideIDASrvx64.exe and HookLibraryx64.dll to your plugins directory
• for x64dbg 32bit: Copy HookLibraryx86.dll, NtApiCollection.ini and ScyllaHideX64DBGPlugin.dp32 to your plugins directory
• for x64dbg 64bit: Copy HookLibraryx64.dll, NtApiCollection.ini and ScyllaHideX64DBGPlugin.dp64 to your plugins directory

ini Note: The default ini contains settings for this protectors:

• VMProtect x86/x64
• Obsidium x86
• Themida x86
• Armadillo x86

Feel free to contribute settings for other protectors!

IDA Note:

• Start ScyllaHideIDASrvx64.exe to debug 64bit applications
• Start ScyllaHideIDASrvx86.exe to debug remotely 32bit applications

Commandline: ScyllaHideIDASrvxXX.exe

ScyllaHideIDASrv Note:

• Server needs HookLibraryxXX.dll and NtApiCollection.ini

Special thanks to:

• What for his POISON Assembler source code https://tuts4you.com/download.php?view.2281
• waliedassar for his blog posts http://waleedassar.blogspot.de
• Peter Ferrie for his PDFs http://pferrie.host22.com
• MaRKuS-DJM for OllyAdvanced assembler source code
• MS Spy++ style Window Finder http://www.codeproject.com/Articles/1698/MS-Spy-style-Window-Finder

ToDo:

• x64 Exception Support

NOTE: You need to put NtApiCollection.ini in the same directory as ScyllaHide.dll or the following hooks will not work: NtUserQueryWindow, NtUserBuildHwndList, NtUserFindWindowEx

Info about NtApiCollection.ini: Some Nt* WINAPI functions are not exported by a DLL, so it is necessary to get the function adresses from another source. The other source is the PDB file. The adresses can be resolved with this tool: https://bitbucket.org/NtQuery/pdb-getprocaddress It will download the PDB file from the Microsoft server to resolve the missing function adresses. Binaries: https://bitbucket.org/NtQuery/scyllahide/downloads/NtApiTool.rar