the giant black book of computer viruses phần 7 pot
the giant black book of computer viruses phần 7 pot
... bytes)
and so on.
Potentially RAND_INSTR will need classes with very limited
capability, like (1), so we should include them. At the other end of
the scale, the fancier you want to get, the better. ... such techniques in the
early 90’s. Some of the first viruses which employed such tech-
niques were the 1260 or V2P2 series of viruses. Before long, a
Bulgarian who called...
the giant black book of computer viruses phần 3 potx
... free at the time of the
;execution of the boot sector.
ORG 0500H
DISK_BUF: DB ? ;Start of the buffer
;Here is the start of the boot sector code. This is the chunk we will take out
;of the compiled ... Kilroy-B. The Kilroy virus dis-
cussed in The Little Black Book of Computer Viruses developed
just this problem!) In the next chapter, we’ll discuss a...
the giant black book of computer viruses phần 4 potx
... writes. First, DEVIRUS finds the end of the host file and uses
that as the offset for the new STRAT routine, writing this value into
the header. Next it hides the address of the old STRAT routine
internally ... using DPMI function 7.
4. Set the limit (size) of the new segment using DPMI function 8. This
is just the size of the memory we allocated above.
5. Set...
the giant black book of computer viruses phần 5 pot
... properly. The trick is to put a null in it right after the
opening bracket of the declaration of virush[]:
static char virush[]={49,52,
. . . . .
63,68,61 ,72 ,20 ,76 ,69 ,72 ,75 ,73 ,68,5B,5D,3D,7B,0,7D,
(c ... function and
then disassemble it.
the virus is run. Thus, all of Developer A and Developer B’s clients
could suffer loss from the virus, regardless of whether or...
the giant black book of computer viruses phần 6 pot
... relative to the end of the file using Function
42H, Subfunction 2 must be adjusted to be relative to the end of the
host. The virus handles this by first doing a move to the end of the
file with the ... If the read requests data at the end of the file where
the virus is hiding, the virus can defeat the read, or simply truncate
it so that only the host is...
the giant black book of computer viruses phần 8 pot
... in the directory where the file is missing, and you don’t
have integrity data for any of them anymore. You scan them, sure,
but the scanner turns up nothing. Why was the file missing? Are
any of ... much work.
All one has to do is calculate the size of the file from the EXE
header, rather than from the file system, and use that to add the virus
to the file. An altern...
The Little Black Book of Computer Viruses phần 7 pot
... enlarging it.
109 The Little Black Book of Computer Viruses
:10049000A2AF00FEC0A2FD00E80100C3E8510 073 56
:1004A0004C803EFD000 074 3FFE0EFD00BFAF00BE5D
:1004B000AA00E8BB00 475 7E 876 0 075 235F32C0AA60
:1004C000BFAF00BB4F00A0FD00B22BF6E203D88BFC
:1004D000F3E89C0057E8C4FF7412E 876 0 074 DDFE70
:1004E00006FD005F32C0AAB0010AC0C35F32C0C3BC
:1004F000BA0600B41ACD21BFAF00BEA300E 870 0059...
the giant black book of computer viruses phần 1 ppsx
... of viruses, you will
already understand the majority of viruses being written today.
Most of them are one of these three types and nothing more.
Before we dig into how the simplest of these viruses, ... far. Not so, the computer virus, because
it attaches itself to otherwise useful programs. The computer user
will execute these programs in the normal course of us...
the giant black book of computer viruses phần 2 pdf
... relative to the start of
the code in the EXE file. This
is relocated by DOS at load time.
18H 2 Reloc Tbl Offset Offset of the start of the
relocation table from the start
of the file, in ... be the first byte of the virus.
3. Write the virus code currently executing to the end of the EXE file
being attacked.
4. Write the initial value of ss:sp, as s...
the giant black book of computer viruses phần 9 pdf
... 193,14,82,5,121,126,192,129,2 47, 180,201,126,1 87, 33,163,204,29,156,24,
14,254,1 67, 1 47, 189,184, 174 ,182,212,141,102,33,244,61,1 67, 208,155,1 67,
236, 173 ,211,150,34,220,218,2 17, 93, 170 ,65,99,115,235,0,2 47, 72,2 27, 123,
... 172 ,226,23,133,180,69,190,59,148,152,246,44,9,249,251,196,85,39,154,184,
74 ,141,91,156 ,79 ,121,140,232, 172 ,22,130,253,253,154,120,211,102,183,145,...
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