{"id":19369428,"url":"https://github.com/kara-4search/newntdllbypassinlinehook_csharp","last_synced_at":"2025-08-03T09:06:25.283Z","repository":{"id":136107029,"uuid":"402318996","full_name":"Kara-4search/NewNtdllBypassInlineHook_CSharp","owner":"Kara-4search","description":"Load a fresh new copy of ntdll.dll via file mapping to bypass API inline hook.","archived":false,"fork":false,"pushed_at":"2021-09-06T13:59:58.000Z","size":46,"stargazers_count":62,"open_issues_count":1,"forks_count":10,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-06-06T04:35:27.242Z","etag":null,"topics":["bypass","bypass-antivirus","bypass-edr","csharp","filemapping","pentest","pentesting","redteam","shellcode","shellcode-loader"],"latest_commit_sha":null,"homepage":"","language":"C#","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/Kara-4search.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2021-09-02T06:46:51.000Z","updated_at":"2025-06-04T05:25:07.000Z","dependencies_parsed_at":null,"dependency_job_id":"1704fa72-45c9-4b15-8ecb-7458afac4f8a","html_url":"https://github.com/Kara-4search/NewNtdllBypassInlineHook_CSharp","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/Kara-4search/NewNtdllBypassInlineHook_CSharp","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Kara-4search%2FNewNtdllBypassInlineHook_CSharp","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Kara-4search%2FNewNtdllBypassInlineHook_CSharp/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Kara-4search%2FNewNtdllBypassInlineHook_CSharp/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Kara-4search%2FNewNtdllBypassInlineHook_CSharp/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/Kara-4search","download_url":"https://codeload.github.com/Kara-4search/NewNtdllBypassInlineHook_CSharp/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Kara-4search%2FNewNtdllBypassInlineHook_CSharp/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":268519109,"owners_count":24263047,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-08-03T02:00:12.545Z","response_time":2577,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["bypass","bypass-antivirus","bypass-edr","csharp","filemapping","pentest","pentesting","redteam","shellcode","shellcode-loader"],"created_at":"2024-11-10T08:11:15.188Z","updated_at":"2025-08-03T09:06:25.239Z","avatar_url":"https://github.com/Kara-4search.png","language":"C#","funding_links":[],"categories":[],"sub_categories":[],"readme":"# NewNtdllBypassInlineHook\n\nBlog link: working on it\n\n- Base on my other projects down below.\n\t1. [MappingInjection](https://github.com/Kara-4search/MappingInjection_CSharp)\n\t2. [SysCall_ShellcodeLoader](https://github.com/Kara-4search/SysCall_ShellcodeLoad_Csharp)\n\t3. [HookDetection](https://github.com/Kara-4search/HookDetection_CSharp)\n\t4. [DInvoke_ShellcodeLoader](https://github.com/Kara-4search/DInvoke_shellcodeload_CSharp)\n\t\n- Use a clean version of ntdll.dll, and import function from this ntdll.dll.\n- Only testd on Win10/x64, may need some modifications on \u003cMainFunction.cs\u003e to works on x86.\n- Steps\n\t1. Load a fresh new copy of ntdll.dll via file mapping.\n\t2. Load the copy into memroy and get a \"BaseAddress\".\n\t3. Use the \"BaseAddress\" and function's name, function's RVA to find function's address.\n\t4. Export the function's address and use the function via \"delegate\".\n\t5. Shellcode execute.\n\n- **You could even modify the code to**:\n\t* Classic process injection.\n\t* MappingInjection(https://github.com/Kara-4search/MappingInjection_CSharp)\n\t* APCexecution(https://github.com/Kara-4search/APC_ShellcodeExecution_CSharp)\n\t* EarlyBirdInjection(https://github.com/Kara-4search/EarlyBirdInjection_CSharp)\n\n- The shellcode below is a messagebox\n```\n\t\t\t/* MessageBox */\n\t\t\tbyte[] buf1 = new byte[323] {\n\t\t\t\t0xfc,0x48,0x81,0xe4,0xf0,0xff,0xff,0xff,0xe8,0xd0,0x00,0x00,0x00,0x41,0x51,\n\t\t\t\t0x41,0x50,0x52,0x51,0x56,0x48,0x31,0xd2,0x65,0x48,0x8b,0x52,0x60,0x3e,0x48,\n\t\t\t\t0x8b,0x52,0x18,0x3e,0x48,0x8b,0x52,0x20,0x3e,0x48,0x8b,0x72,0x50,0x3e,0x48,\n\t\t\t\t0x0f,0xb7,0x4a,0x4a,0x4d,0x31,0xc9,0x48,0x31,0xc0,0xac,0x3c,0x61,0x7c,0x02,\n\t\t\t\t0x2c,0x20,0x41,0xc1,0xc9,0x0d,0x41,0x01,0xc1,0xe2,0xed,0x52,0x41,0x51,0x3e,\n\t\t\t\t0x48,0x8b,0x52,0x20,0x3e,0x8b,0x42,0x3c,0x48,0x01,0xd0,0x3e,0x8b,0x80,0x88,\n\t\t\t\t0x00,0x00,0x00,0x48,0x85,0xc0,0x74,0x6f,0x48,0x01,0xd0,0x50,0x3e,0x8b,0x48,\n\t\t\t\t0x18,0x3e,0x44,0x8b,0x40,0x20,0x49,0x01,0xd0,0xe3,0x5c,0x48,0xff,0xc9,0x3e,\n\t\t\t\t0x41,0x8b,0x34,0x88,0x48,0x01,0xd6,0x4d,0x31,0xc9,0x48,0x31,0xc0,0xac,0x41,\n\t\t\t\t0xc1,0xc9,0x0d,0x41,0x01,0xc1,0x38,0xe0,0x75,0xf1,0x3e,0x4c,0x03,0x4c,0x24,\n\t\t\t\t0x08,0x45,0x39,0xd1,0x75,0xd6,0x58,0x3e,0x44,0x8b,0x40,0x24,0x49,0x01,0xd0,\n\t\t\t\t0x66,0x3e,0x41,0x8b,0x0c,0x48,0x3e,0x44,0x8b,0x40,0x1c,0x49,0x01,0xd0,0x3e,\n\t\t\t\t0x41,0x8b,0x04,0x88,0x48,0x01,0xd0,0x41,0x58,0x41,0x58,0x5e,0x59,0x5a,0x41,\n\t\t\t\t0x58,0x41,0x59,0x41,0x5a,0x48,0x83,0xec,0x20,0x41,0x52,0xff,0xe0,0x58,0x41,\n\t\t\t\t0x59,0x5a,0x3e,0x48,0x8b,0x12,0xe9,0x49,0xff,0xff,0xff,0x5d,0x49,0xc7,0xc1,\n\t\t\t\t0x00,0x00,0x00,0x00,0x3e,0x48,0x8d,0x95,0x1a,0x01,0x00,0x00,0x3e,0x4c,0x8d,\n\t\t\t\t0x85,0x2b,0x01,0x00,0x00,0x48,0x31,0xc9,0x41,0xba,0x45,0x83,0x56,0x07,0xff,\n\t\t\t\t0xd5,0xbb,0xe0,0x1d,0x2a,0x0a,0x41,0xba,0xa6,0x95,0xbd,0x9d,0xff,0xd5,0x48,\n\t\t\t\t0x83,0xc4,0x28,0x3c,0x06,0x7c,0x0a,0x80,0xfb,0xe0,0x75,0x05,0xbb,0x47,0x13,\n\t\t\t\t0x72,0x6f,0x6a,0x00,0x59,0x41,0x89,0xda,0xff,0xd5,0x48,0x65,0x6c,0x6c,0x6f,\n\t\t\t\t0x2c,0x20,0x66,0x72,0x6f,0x6d,0x20,0x4d,0x53,0x46,0x21,0x00,0x4d,0x65,0x73,\n\t\t\t\t0x73,0x61,0x67,0x65,0x42,0x6f,0x78,0x00 };\n```\n\n## Usage\n1. Just launch through a white-list application\n\t![avatar](https://raw.githubusercontent.com/Kara-4search/ProjectPics/main/NewNtdllBypassInlineHook_shellcodeexecute.png)\n\n## TO-DO list\n- Works on both x64/x86\n\n## Update history\n- Restructure Code - 20210903\n- Remove unnecessary code in NativeFunctions.cs - 20210906\n\n## Reference link:\n\t1. https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilea\n\t2. http://pinvoke.net/default.aspx/kernel32/CreateFile.html\n\t3. https://idiotc4t.com/defense-evasion/load-ntdll-too\n\t4. http://blog.leanote.com/post/snowming/a0366d1d01bf\n\t5. https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/nf-ntifs-ntallocatevirtualmemory\n\t6. https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createthread\n\t7. http://pinvoke.net/default.aspx/ntdll/NtCreateThreadEx.html\n\t8. https://blog.sektor7.net/#!res/2021/halosgate.md\n\t9. https://www.ired.team/offensive-security/defense-evasion/using-syscalls-directly-from-visual-studio-to-bypass-avs-edrs\n\t10. https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createremotethread\n\t11. http://pinvoke.net/default.aspx/kernel32/CreateFile.html\n\t12. https://idiotc4t.com/defense-evasion/load-ntdll-too\n\t13. https://makosecblog.com/malware-dev/dll-unhooking-csharp/\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkara-4search%2Fnewntdllbypassinlinehook_csharp","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkara-4search%2Fnewntdllbypassinlinehook_csharp","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkara-4search%2Fnewntdllbypassinlinehook_csharp/lists"}