来源:lam's blog
* q7 o) o) s% ]/ w" d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.
# d. r! h# ?- O7 P3 ^% ]" P% p n结果在安天CERT小组 看到了这个: 7 a2 @ ~7 D1 Z4 ~4 K8 d9 I* Y
软件名称:exe2swf
8 h% I$ K8 e/ x% Y适用系统:WIN 9x/ME/2000/NT
* f; x2 L3 l( n" { Y1 z$ V+ y文件大小:11K
6 l7 l6 g6 q. ?0 L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。 4 a" F! \* k4 [8 k/ O
下载:http://soft.hackbase.com/37/20050319/6389.html
/ B% V2 z; U3 v0 u+ P- X" R( |) ]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 4 L/ g! ^2 q& Y7 P
作者:海娃 3 Q- C7 U- m5 G! {6 k2 o
用法: 8 b* k) v, r2 `7 `
3 r" u7 _; d! M" T- 将下面代码存为 exe2swf.vbs
5 b8 \# m/ @2 n( U# G6 \
- 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.Net4 W' ?3 O: E) _: J- b. `
'感谢jimbob提供帮助.+ N3 D0 d0 t! z' g, R
dim AsoR,FlashFileName
5 \! p7 |; v1 I6 P9 R/ m5 CSet ArgObj = WScript.Arguments
3 n3 _4 r4 B4 d7 {9 `; edim PositionStart,OKed,Tag,EndSize
) K4 \( X, D- D" v) x# y( U0 EPositionStart = 920000'flash 4的播放器的大致字节数
8 M/ p3 c; A3 }# \' OEndSize = 8 'exe文件结尾字节数,其它版本可以设置为0" G/ N0 {+ z* V
FlashFileName = ArgObj(0)'传递路径
" O4 t6 ^6 ]( t, Y- f/ O* c: Xset AsoR=CreateObject("Adodb.Stream")
/ k5 u0 \/ \' a$ T$ KAsoR.Mode=3 4 l2 \1 {7 n# D0 O: }$ A* I
AsoR.Type=1
) C& s3 Z1 b1 X! XAsoR.Open
% j% T9 R+ U/ i) U* ~# ~5 Hset AsoW=CreateObject("Adodb.Stream")
( S/ s6 i1 P6 I8 S! j( iAsoW.Mode=3
/ f5 l8 i2 J, S5 S2 w/ R: _AsoW.Type=1 # \3 D5 G, Y& j, W- Q0 Z) l! x5 m
AsoW.Open
7 u: N: A/ T3 d' VAsoR.LoadFromFile(FlashFileName)
3 L' ]: q: `, W. Y3 e gOKed = true% u& K$ R4 @: Y- @
dim filesize: C3 {& c$ K+ j. F" ~& ?' o
filesize = AsoR.size
" `/ z- p S0 \9 ?if filesize> ositionStart then
: J3 z- l* V: i& g8 O9 l8 N; f+ D while OKed& X3 a5 U4 v( @, T- a
AsoR.Position = PositionStart" P' Z1 P& C u1 p
Tag = Bin2Str(AsoR.read(20))
" Y8 \& E- w- k2 G c% u4 z$ Q if instr(Tag,"0000000") >0 then
5 a, a. [6 |5 @2 I8 T9 V PositionStart = PositionStart + 1 S5 B1 A8 {/ E( K8 p6 b
else
& K; K. y4 X" c& i PositionStart = PositionStart + 20. k7 V% ]! {8 C3 g9 |* M
end if
/ `9 d2 \3 V3 [3 ~0 k if Tag = "00000000000000000708783" or Tag = "00000000000000000678783" then; w$ F' |* I. V, t; R4 A+ S3 k
OKed = false3 k' A( c/ d2 E& f# d# R4 e/ V
end if
4 f7 |, M' B& j 'if PositionStart > filesize then0 d: o; Y# Q( D+ n' e2 @) ~: G5 x2 V
' OKed = false* ^% {5 L4 v1 V* m4 `" b( R( n* n
'end if4 N# R- u& N$ ^6 ~" |6 c) ?
wend
2 w: k- h. n% x# V, z+ nelse
2 W) E" G: [0 K0 Z" I# A- k1 I; i msgbox "文件错误"
- |) T. s" n1 c0 \) T* x, Y) yend if6 ?& j4 [6 Z' y- \. c$ j+ r& f
PositionStart = PositionStart + 16
# v7 c7 T. [9 ?/ }" T* g: _'msgbox PositionStart
6 g. N( T" |5 A4 H& @' K# Z- p% S j0 jAsoR.Position = PositionStart6 S/ I8 D/ \) ?: O; z8 x' \% B
AsoW.write AsoR.read(filesize-int(PositionStart)-int(EndSize)) 0 z& o3 @# @5 K
'新文件名
8 h3 q. {; M2 t, |" Y( t2 O! tdim newFileName
4 a: l1 G& d; ?6 i" x3 M'newFileName = left(FlashFileName,len(FlashFileName)-4) & ".swf"
- w! U) v' D% H' g' k, i6 K! P1 SnewFileName = FlashFileName & ".swf" & K3 b6 r! ?; C
Set fso = CreateObject("Scripting.FileSystemObject")+ k+ G2 E: J! A8 e2 F
If (fso.FileExists(newFileName)) Then
( e7 F0 G2 O% A7 }9 {/ {5 u overwrite = msgbox(newFileName&" 已存在"& vbnewline &"要替换它吗?",308,"文件已经存在 - exe2swf脚本")& G( A( v0 P9 c7 d, G5 L2 f; {- R- {
if overwrite=6 then5 _( ?2 _" j5 ~& p( p% c
AsoW.SaveToFile newFileName, 2, o' j' N6 q7 _6 G7 O3 ?8 c# x1 T# E
else
& c5 W6 O: H8 U o5 d. K' U3 q msgbox "操作被取消",0,"exe2swf脚本"
) L H Y( V5 O; S end if6 j. ] t& E% [7 V3 l, {" V8 K
else
; K* {; g' ~; \ AsoW.SaveToFile newFileName, 12 E' h5 s d, ]/ n
end if
$ n# Y9 ?" w: W2 B" c: D4 F( z" }, eAsoR.close
) a0 k `8 @( o1 s7 ]! Dset AsoR=nothing
, o, N' B& _% ~. D- _# w' sAsoW.close
/ k3 Q9 d1 t' j! Uset AsoW=nothing " u" J. Z% |3 d
Function Bin2Str(Bin)
5 S+ g: n! E- U Dim I, Str
+ N# y+ r/ H; l r2 I2 F For I=1 to LenB(Bin)
7 b( c8 E! C) O' y- X+ q4 f# ~ clow=MidB(Bin,I,1)% z5 i$ x+ i4 |: E4 \: x* \. J0 N" F
if ASCB(clow)<128 then) {9 _- U# p1 k- i O; f1 C
Str = Str & (ASCB(clow))8 d# z/ {; `; Q* v
else' e7 a% r, u- w% ^1 k
I=I+1
9 J2 A7 \ m) T if I <= LenB(Bin) then Str = Str & (ASCW(MidB(Bin,I,1)&clow))
/ Z8 s8 g/ Q/ o3 i5 U# } end if/ d! z8 A- c% @4 f6 O
Next & ?; Q5 E% V4 u% D
Bin2Str = Str6 u8 f' c- z, l( `* R
End Function ' G- c# q2 w- `$ h _
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