Tim vc-xin cho AutoCAD ca bnth 5, 20/12/2012 01:33:08- chuyn
mcTrang chCng nghKinh nghim - Th thutVirus c vit di ngn ng Autolisp
(mt dng virus macro) chy di mi trng AutoCAD, n lm mt mt s lnh thng
dng cng nh thay i thit lp h thng khin vic s dng AutoCAD tr nn rt kh
khn. My tnh nhim virus ny th d c ci li Windows hay AutoCAD u khng
khc phc c v file virus nm ri rc khp cc th mc trn cng. Khc vi Macro
trong Excel hay Word, phn mm AutoCAD khng th disable autolisp v hn
na ngi dng AutoCAD li s dng rt nhiu autolisp cho cng vic ca h.Mt s
phn mm Antivirus (nh BKAV, Kapersky,...) dit c mt s dng ca virus ny
nhng khng dit c ht bin th a dng ca n ang ngy ngy c sn sinh. Nguyn
nhn ca s a dng cc bin th l v mt ngi c trnh Autolisp mc c bn cng c
th h bin mt con virus gc thnh mt bin th khc ch bng phn mm
Notepad.Bi vit ny gii thiu mt cch to vc-xin tim vo AutoCAD. Liu
vc-xin l mt on m Autolisp cm mi thao tc ghi vo cc th mc h thng ca
AutoCAD - trit tiu nguyn nhn cn bn nht ca s ly nhim virus. Lnh cm
ny khng nh hng n cc m lisp lnh tnh thng thng. Ngoi ra, phng nga ly
nhim, vc-xin ny s loi b mi file t ng chy nm th mc cha bn v trnh b t
ng ti ln v thay i thng s h thng.Gii php:AutoCAD khi khi ng, s ln lt
t ng load cc file Autolisp. Trong file acad20##.lsp (20##l phin bn
AutoCAD, v d 2012) trong th mc ci t AutoCAD c load u tin. Cc file
file acad.lsp, acaddoc.lsp, acad.fas v acad.vlx,... (cc file virus
tim tng) trong th mc cha bn v s c t ng load vo ngay sau . V vy ta s
tim vc-xin vo file ny v hiu ha cc m virus tim tng ny. Sau y l 3 bc
x l tim vc-xin.Bc 1.Chy phn mm Notepad v m file acad20##.lsp trong
th mc C:Program FilesAutodeskAutocad20##Support. Nu bn khng tm thy
file ny, hy g (findfile acad20##.lsp) ti dng lnh AutoCAD hin th ng
dn ti file ny, bn nh thay20##bng phin bn AutoCAD ca bn (v
d:2000,2002,2004,..2013).Bc 2.Nhp cc on m lnh sau vo cui file
autocad20##.lsp:;lu lnh open gc(if (null cadvietoon)(setq
cadvietoon open)); hm xc nh mt file c nm trong th mc h thng hay
khng?(defun cadvietisf(f) (wcmatch (strcase (vl-filename-directory
f)) (strcase (strcat (vl-filename-directory (findfile "base.dcl"))
"*," (strcat (vl-filename-directory (findfile "acad.exe")))"*"))));
G bo v cho hm open file(pragma '((unprotect-assign open))); nh ngha
li hm open file chn thao tc write v append; nu file nm trong th mc
h thng(defun open (f m)(if (and (wcmatch m "W,A,w,a") (cadvietisf
f)) (progn (princ (strcat " CADViet Vacine prevents writing to: " f
" -------------------- ")) nil) (cadvietoon f m))); t li bo v cho
hm open file(pragma '((protect-assign open))); Xa cc file autorun
khng nm trong th mc h thng(foreach fn (list "acad.lsp" "acad.fas"
"acad.vlx" "acaddoc.lsp" "acaddoc.fas" "acaddoc.vlx" "acad.dvb")(if
(and (findfile fn) (not (cadvietisf fn))) (vl-file-delete (findfile
fn)) )); Gii phng bin(setq fn nil); Gi vl-load-com nu cha c gi(if
vlax-ename->vla-object (vl-load-com)); In thng bo vc-xin c load
ln thnh cng(princ " ---------- CADViet Vaccine is loaded!
---------- ")(princ)
Bn lu l cc t sau du chm phy (;) ca m lnh l cc dng comment, khng
nht thit phi g vo. Hoc bn c th download dng m trn :
http://www.cadviet.com/upfiles/3/vs.lsp sau copy v paste vo file
acad20##.lsp.Bc 3.Save file acad20##.lsp li.Nh vy l bn tim cho
AutoCAD ca bn mt liu vc-xin, m bo t gi tr i bn s khng b nhim
AutoCAD na. Nu v mt l do no bn mun g vc-xin ra khi AutoCAD, bn ch
cn xa cc dng thm vo ra khi file l c.Xemtin cng nghmi nht ti
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