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来源:lam's blog & `# O) D/ l6 [$ i
最近好象又开始流行播放器里插木马了,我于是在网上转了转,看有没有什么好东西能预防的.
; u# I6 X/ l" ]2 U. g: M结果在安天CERT小组 看到了这个:
6 A/ |- q5 ]+ |& u& n) C Y) d软件名称:exe2swf
- w- I5 S/ y+ f/ G适用系统:WIN 9x/ME/2000/NT
0 J3 I. w5 y2 s( |文件大小:11K
/ I: z5 X( V3 |! [( w0 }5 w" ~文件说明:FLASH格式文件转换器为了防止有人在可执行的FLASH格式文件(.exe)中夹插木马,或者用flash图标的木马冒充flash文件,编写了一个简单的工具。
# d* Y4 F F) I9 P, w下载:http://soft.hackbase.com/37/20050319/6389.html
4 P5 ^) `2 P* c7 Y4 A哈,但是还有还想不到的呢,我找到了一段可以实验这个功能的代码
1 i; ]# q% j* ^# m: z作者:海娃
' G( ^* }, a, q3 K4 j用法:
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1 r% U8 ? ^0 F: H9 M! h) p- 将下面代码存为 exe2swf.vbs
/ t+ i5 ]: w/ x8 r/ s% f+ B
- 将exe格式的flash拖放在此文件上,即可生成swf文件,
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8 H4 j5 j% ?1 i) K3 k% F'haiwa@http://www.51windows.Net
! D6 X9 x3 |6 b" s/ T7 }; Z2 ~'感谢jimbob提供帮助.
! ?& H; m. I4 R7 Z Wdim AsoR,FlashFileName
) J% c* v- ]! c6 Q& @5 B/ j JSet ArgObj = WScript.Arguments / H+ B' H. D( I9 y2 h! ^
dim PositionStart,OKed,Tag,EndSize+ R, U/ n; c- v% F4 m8 x
PositionStart = 920000'flash 4的播放器的大致字节数3 R$ t3 Y9 T0 K( S7 z+ b) e
EndSize = 8 'exe文件结尾字节数,其它版本可以设置为0! B: ?2 @8 C5 a' d
FlashFileName = ArgObj(0)'传递路径
7 p9 s- w% p! A+ \' r+ p' Mset AsoR=CreateObject("Adodb.Stream")9 u0 W y9 n/ \3 o$ C
AsoR.Mode=3 ) i- v( ~' {, X4 l2 F: h; O
AsoR.Type=1 0 z# i- D, l; m" ^, [. I
AsoR.Open
- H3 O3 J% t( M: ?2 }' m; Sset AsoW=CreateObject("Adodb.Stream")$ {8 E8 P: u9 S5 C' \0 u
AsoW.Mode=3 4 G! j$ h3 t8 ^8 P6 M! A: U
AsoW.Type=1
, C- w3 ~6 i+ g/ A3 T& @( k" y% aAsoW.Open
. o2 O, v: k5 t4 q8 E1 E" ]AsoR.LoadFromFile(FlashFileName) 4 Z1 ]0 |7 ]8 X) H* b; y: q; R- {
OKed = true! P5 D7 h. b- i& b
dim filesize- P6 n7 |( M- ~' h) C+ e' c
filesize = AsoR.size 3 G( P+ H& G4 ]' B/ D9 @# ]% }0 ~
if filesize> ositionStart then+ @* F" {, f; T! z
while OKed
% f* Q S; T% R% s* g AsoR.Position = PositionStart
' V9 d" m7 F5 r% L Tag = Bin2Str(AsoR.read(20))
# W$ R* U! b6 ? Y7 U/ H3 n if instr(Tag,"0000000") >0 then4 r1 {4 s& c: Z& U9 ?& Q- Q
PositionStart = PositionStart + 14 J2 ~0 N9 r5 d! [' \* t N5 \
else. _$ Y% [4 Y* q$ h4 ]
PositionStart = PositionStart + 20
9 j2 }- M8 L7 Q* L" s end if7 b5 S' b# W" Z
if Tag = "00000000000000000708783" or Tag = "00000000000000000678783" then
9 X, m! D# F N$ I OKed = false: z$ L% K' w+ i
end if# Y+ n4 T1 Q( i% k
'if PositionStart > filesize then
" o2 X( K; h7 T0 T( a+ S ' OKed = false4 W6 \4 x/ O7 U! `0 D+ l; f
'end if
8 q% z9 @) R: V8 }$ n. t wend
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msgbox "文件错误"
, g2 J- {5 j, S! ^) T4 U' [end if+ q/ G2 R8 {' f7 |5 K
PositionStart = PositionStart + 16
* z5 p: ], E/ P! `; o" g/ F'msgbox PositionStart( l. i5 R" Q# F/ F+ s) `, A
AsoR.Position = PositionStart; _; g" e# f5 K+ O0 u& W' T
AsoW.write AsoR.read(filesize-int(PositionStart)-int(EndSize)) ( S1 R0 t. K' O d5 n, u& W
'新文件名/ j& Q" Q' H, c
dim newFileName |# Z# F1 }3 d( e/ x% L% h
'newFileName = left(FlashFileName,len(FlashFileName)-4) & ".swf"
' M2 i( N: Y. o* |newFileName = FlashFileName & ".swf" ! B# j# p4 _" k; B# I9 _
Set fso = CreateObject("Scripting.FileSystemObject")
$ ? o. R% n, S2 g' QIf (fso.FileExists(newFileName)) Then
$ | I$ |% I6 w/ r$ @7 O overwrite = msgbox(newFileName&" 已存在"& vbnewline &"要替换它吗?",308,"文件已经存在 - exe2swf脚本")
" r D) @5 A( C' T5 T/ I if overwrite=6 then- a5 A( L# d- e0 u. u2 F, t
AsoW.SaveToFile newFileName, 2: t: l& M) Y6 M b+ O& s# Q8 L7 H
else, L) M- {- Z4 M
msgbox "操作被取消",0,"exe2swf脚本"
( N4 ~) H$ @1 P/ N# N( `% C! d( c' W end if1 U) I$ q7 e6 f5 k
else- V6 F* P ~# j$ M
AsoW.SaveToFile newFileName, 1
* B- ^$ Q/ G0 Zend if
' z4 X( y T5 z# ?& b/ m6 Z( rAsoR.close$ w, P& z. Q: B1 c9 ]% o6 a
set AsoR=nothing
$ c- t0 ]+ g4 f5 m" v% h& vAsoW.close
# s B# s: b; S) n$ X0 Lset AsoW=nothing
3 ?& ^5 j9 U4 l) O! xFunction Bin2Str(Bin)7 b* S4 {7 B5 b' W
Dim I, Str
1 e) N# B7 z: ?7 ]1 d For I=1 to LenB(Bin)2 y. m7 G4 o G2 k9 L0 w
clow=MidB(Bin,I,1)
# Z& x1 k8 d( v7 X* l if ASCB(clow)<128 then8 o7 S6 I% B5 @/ y5 L! y
Str = Str & (ASCB(clow))
; \' }" M$ e& X8 v. t4 _, z else+ p5 {1 `4 F& x. @
I=I+1
1 u1 T# c/ S) t( u5 R if I <= LenB(Bin) then Str = Str & (ASCW(MidB(Bin,I,1)&clow))
! u& {" i l7 u2 |$ K end if# d u# @9 R- I. V. G
Next
" v0 ~1 q2 z7 z& b9 ^/ x4 _ g Bin2Str = Str
+ G+ e4 i1 O. [/ J$ V4 vEnd Function ; X [- G5 F+ s( U
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