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sdlj8051

金虫 (著名写手)

[交流] SEH 於病毒的應用[转贴]

*?@??????b????о???????????????????g???????????????????x?x???????κ????????g
????κ?????????o?P??


???飺

SEH ????N???????????N?|?|??????????????hume?????SEH in ASM ???о???????
??Win32 Exception handling for assembler programmers by Jeremy Gordon????????????@?
?????°??


1.????N???????e???seh???

?κγ????п??????e?`???F??????????????e??????????????????????????X??
?????_??????????????????e?????N???п??????????????????e?`??????@?????????????
??]????N????????????????X?????????????????????SEH?????????????e?п?????F???e
?`???@?? SEH ?????е????????????????????SEH ?????????????????????SEH??????
?????e???a?????????

???????????e??????????????--???????????????????????_??\?е?r????
?l?F??????????N????????????????????????????????????????o ?????????? ?l?F??

??????????\?Еr???????????????M???????a???????????????c?????????N?@??????
?????????????????@?r????????????????m??????????????????????????e???SEH?O????????
?oAVs??Emulator???@?????????????????



2.?????SEH??????????Emulator??


o????o?????????}??????????N??g???M???????a??????????????_?????b???SEH,
?????????????????????????????u????????????@????M????????????(????????)?^?m????
???????????s????????@??????????????????????ЩAVs?????????e?`???a?????D?^?m??M???
????????N?????????M?????????h????????How?? ???????????a:

*??????a??????benny's polymorphic engine

start:call Set_SEH;?@????????? push offset CONTINUE
;      JMP Set_SEH
CONTINUE:mov esp, [esp+8];???????? ??????????a???r,??y??????????K???????????                          
                                       ;????????????????e,??[ESP+8]?????????f????????


push offset Start_Virus ;----_ ??Start_Virus ???????M????e????????????
ret;----  ?????????ret??????Start_Virus?????????magic?



Set_SEH:sub edx, edx            ;Edx =0

;???????????masm??????????????,???????????g?e?`
;Assume fs:nothing

push dword ptr fs:[edx];???? _EXCEPTIONAL_REGISTRATION_RECORD ?Y????????????
mov fs:[edx], esp;???b???seh ???
mov [edx],edx;????@?e???????????,???edx=0, ?????????????x?????_????????

;???Emulator ??????????????M??seh ???????(?? CONTINUE: )???^?m?
;?M???????????jmp start?????N????M?????????h???@?????????
               jmp start       ;?C


Start_Virus:    .....
.....

?????????!
???????????????]?P????]????N????N??????????o????????????°?????qq:50527053,icq 72424549
email:henrynote@msn.com


*???
SEH ????ú??V?????b????????e????(?U?)??????????????????????A????????SEH ???g????????
?????????
???@??????????????????λ???W?????W???Y??,???????W?????????c??????M????
???@?e????x??????????????^?????????й??????@??????-???_????к???硣

--------------------------------------------------------------------------------------------------------------
?????D?d????]????????henrynote??! Henry's WorkShop :http://hackit2000.virtualave.net
Thankyou For Very Much !

[ Last edited by sdlj8051 on 2006-10-6 at 12:46 ]
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gph-rabbit

金虫 (小有名气)

看看了,谢谢。
2楼2006-12-29 01:20:26
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3楼2006-12-29 09:49:07
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