来源:lam's blog
`1 @+ m" E! ?+ |8 l+ B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. % b+ Y; W v/ q# ^9 R2 `
结果在安天CERT小组 看到了这个:
' o7 |2 W7 k! x; ~6 C软件名称:exe2swf
2 h) |" o: u5 r/ `6 p7 q2 l2 P3 E2 Z适用系统:WIN 9x/ME/2000/NT
0 a# J8 y! c% Y9 |8 y文件大小:11K
" o( N$ q8 G) P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。
3 ^$ @$ a" r; \下载:http://soft.hackbase.com/37/20050319/6389.html
! [0 R9 f4 U9 c2 [; j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
' z4 q' ~0 ~: \. H# C6 H作者:海娃 3 d; E# Y2 V6 T& U6 d) W4 i
用法:
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- 将下面代码存为 exe2swf.vbs
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- 将exe格式的flash拖放在此文件上,即可生成swf文件,
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'haiwa@http://www.51windows.Net) i* n, ~" Z* q8 c0 k
'感谢jimbob提供帮助.
4 h$ _4 Z) H$ F8 N: O7 Z4 `dim AsoR,FlashFileName8 E; h3 U% F& C( `. } p
Set ArgObj = WScript.Arguments ! v. d/ }5 u7 X' T M! M" D8 y
dim PositionStart,OKed,Tag,EndSize
" {% W$ j" [; @3 o) f+ ~# zPositionStart = 920000'flash 4的播放器的大致字节数% M3 E8 n7 s; }8 q# U2 b. `
EndSize = 8 'exe文件结尾字节数,其它版本可以设置为0
! m. a. L: v/ c6 H; JFlashFileName = ArgObj(0)'传递路径 ! x8 z8 `$ W0 n' c
set AsoR=CreateObject("Adodb.Stream")
z) r( I, v, A7 aAsoR.Mode=3 A6 }/ p% R* J/ }" j, r, R5 Z% M. k
AsoR.Type=1 6 s8 h) a& `: Y* U7 y& o/ o
AsoR.Open
! \4 d3 E6 h7 k4 B: y+ ^set AsoW=CreateObject("Adodb.Stream"). ]2 p, `* Z+ M* i& |
AsoW.Mode=3
; q5 f# i# _. v' I0 [ e( uAsoW.Type=1
5 f/ t2 l2 M! k& v7 gAsoW.Open
. R/ q2 b$ Y' O) i2 N8 PAsoR.LoadFromFile(FlashFileName)
$ a' [7 v: @7 TOKed = true+ x3 X b% m( Q, X/ p: @
dim filesize& n& L1 z' R7 u
filesize = AsoR.size
& y9 y- K; ?% S( A( Kif filesize> ositionStart then
, s% Y7 f3 W3 m. o6 T while OKed) K. z& i, E8 l* Q4 N2 i( D- z0 e
AsoR.Position = PositionStart
4 P. U& N6 o- Q6 ^ Tag = Bin2Str(AsoR.read(20)): r' X. d% Z; O6 M3 z1 p0 w6 `8 x" l9 S
if instr(Tag,"0000000") >0 then- F- h, e: k/ [+ f! v
PositionStart = PositionStart + 1
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PositionStart = PositionStart + 202 g! m( Q) {$ P- Y
end if
5 |, ]4 p' y: p ?2 O; ^, B if Tag = "00000000000000000708783" or Tag = "00000000000000000678783" then5 s* A; v5 V1 F3 p9 U- @6 T
OKed = false/ n$ ^; U5 e, ^8 p+ `" z+ n
end if- u6 M- X* O# c7 j* @$ ?% z/ K
'if PositionStart > filesize then
9 P! b- A2 ~; k+ T0 p# T ' OKed = false
, O. V8 a+ d% U 'end if$ |, b5 }4 ^4 i S
wend' O& x3 @5 R& O. h- \9 {: p9 R
else% f% u6 s( e- E0 t Z, K# K* C
msgbox "文件错误"
* [ v2 p1 I4 U A) qend if* M3 w( w+ J5 M8 g- g8 u, H2 J) v
PositionStart = PositionStart + 16
8 M) ]8 ]& [2 Z8 M2 x'msgbox PositionStart; t7 r/ Z* g+ ~) u- Z% e4 y* [
AsoR.Position = PositionStart
6 H- A; R4 L! ]$ v4 F( NAsoW.write AsoR.read(filesize-int(PositionStart)-int(EndSize))
Z' x5 E; I0 @; k; }. d( d'新文件名: u: M* y8 ^8 J6 a0 z, v! m
dim newFileName Z: P v' O: F- C D' _7 T
'newFileName = left(FlashFileName,len(FlashFileName)-4) & ".swf"0 j2 T- [: f, I- u% h/ A* i! h
newFileName = FlashFileName & ".swf" , L- h: u9 w7 Y7 W
Set fso = CreateObject("Scripting.FileSystemObject")
- F! v* E; t$ J3 g+ B1 P' b% vIf (fso.FileExists(newFileName)) Then
$ v! L5 P: a' g2 A1 L- ? overwrite = msgbox(newFileName&" 已存在"& vbnewline &"要替换它吗?",308,"文件已经存在 - exe2swf脚本")/ V' v! `8 |# T' B$ X
if overwrite=6 then
5 X# l3 L: O% U& X. Y AsoW.SaveToFile newFileName, 2
5 p) p* z1 X; l2 c% f else
8 v' M! \4 s+ M msgbox "操作被取消",0,"exe2swf脚本"
& m" X& b8 O+ q& b0 E1 h end if
# J/ _- K( C: D# _) t0 qelse
: E [+ L' R4 v4 h4 M AsoW.SaveToFile newFileName, 1; G! T1 G& x* E/ f+ M2 w8 a
end if
/ L( C0 z9 m& Q+ x/ {. ~" zAsoR.close
8 x; V% N8 K/ W6 \1 j* |* oset AsoR=nothing, Y: I( r7 ~8 |' f! N5 E
AsoW.close
, r; t. ]) J4 _8 o( ~set AsoW=nothing / s$ U! Y$ ` `3 i5 X! V2 i5 s
Function Bin2Str(Bin); G+ G8 Z, @! Z# v# b7 x
Dim I, Str
2 A4 \% _1 W' A9 ^8 g7 V% A3 @ For I=1 to LenB(Bin)2 L N/ U, r( R7 g+ u ~
clow=MidB(Bin,I,1) A; J/ }2 B" t7 b5 S i% e
if ASCB(clow)<128 then0 i; s2 p' e2 R
Str = Str & (ASCB(clow))* E# U7 B+ u2 R
else# Q$ [" S ~* `/ k7 |0 e, c
I=I+1
1 c2 N, U& A" h if I <= LenB(Bin) then Str = Str & (ASCW(MidB(Bin,I,1)&clow))& H) b7 B. v) L, `7 G5 O* z# P- @
end if
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Bin2Str = Str
# x0 [% D: ~) p! ?- eEnd Function
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