/
signature.asm
77 lines (61 loc) · 2.4 KB
/
signature.asm
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; a PE with a (wrong) authenticode signature
; Ange Albertini, BSD LICENCE 2009-2013
%include 'consts.inc'
IMAGEBASE equ 400000h
org IMAGEBASE
bits 32
SECTIONALIGN equ 1000h
FILEALIGN equ 200h
istruc IMAGE_DOS_HEADER
at IMAGE_DOS_HEADER.e_magic, db 'MZ'
at IMAGE_DOS_HEADER.e_lfanew, dd NT_Headers - IMAGEBASE
iend
NT_Headers:
istruc IMAGE_NT_HEADERS
at IMAGE_NT_HEADERS.Signature, db 'PE', 0, 0
iend
istruc IMAGE_FILE_HEADER
at IMAGE_FILE_HEADER.Machine, dw IMAGE_FILE_MACHINE_I386
at IMAGE_FILE_HEADER.NumberOfSections, dw NUMBEROFSECTIONS
at IMAGE_FILE_HEADER.SizeOfOptionalHeader, dw SIZEOFOPTIONALHEADER
at IMAGE_FILE_HEADER.Characteristics, dw IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_32BIT_MACHINE
iend
OptionalHeader:
istruc IMAGE_OPTIONAL_HEADER32
at IMAGE_OPTIONAL_HEADER32.Magic, dw IMAGE_NT_OPTIONAL_HDR32_MAGIC
at IMAGE_OPTIONAL_HEADER32.MajorLinkerVersion, db 3 ; required for signature
at IMAGE_OPTIONAL_HEADER32.AddressOfEntryPoint, dd EntryPoint - IMAGEBASE
at IMAGE_OPTIONAL_HEADER32.ImageBase, dd IMAGEBASE
at IMAGE_OPTIONAL_HEADER32.SectionAlignment, dd SECTIONALIGN
at IMAGE_OPTIONAL_HEADER32.FileAlignment, dd FILEALIGN
at IMAGE_OPTIONAL_HEADER32.MajorSubsystemVersion, dw 4
at IMAGE_OPTIONAL_HEADER32.SizeOfImage, dd 2 * SECTIONALIGN
at IMAGE_OPTIONAL_HEADER32.SizeOfHeaders, dd SIZEOFHEADERS
at IMAGE_OPTIONAL_HEADER32.Subsystem, dw IMAGE_SUBSYSTEM_WINDOWS_CUI
at IMAGE_OPTIONAL_HEADER32.NumberOfRvaAndSizes, dd 16
iend
istruc IMAGE_DATA_DIRECTORY_16
at IMAGE_DATA_DIRECTORY_16.ImportsVA, dd Import_Descriptor - IMAGEBASE
at IMAGE_DATA_DIRECTORY_16.Security, dd security - IMAGEBASE - (SECTIONALIGN - FILEALIGN), SECURITY_LENGTH
iend
%include 'section_1fa.inc'
EntryPoint:
push Msg
call [__imp__printf]
add esp, 1 * 4
_
push 0
call [__imp__ExitProcess]
_c
Msg db " * a PE with an (incorrect) authenticode signature", 0ah, 0
_d
%include 'imports_printfexitprocess.inc'
align FILEALIGN, db 0
;*******************************************************************************
security:
.dwLength dd SECURITY_LENGTH
.wRevision dw 000h ; not required
.wCertificateType dw 2
;.bCertificate
incbin 'signature.bin'
SECURITY_LENGTH equ $ - security