標 題:
珊瑚蟲外掛原理分析【原創】
作 者:
runjin
時 間: 2005-03-20,21:44
鏈 接: http://bbs.pediy.com/showthread.php?t=12240
珊瑚蟲外掛原理分析
作者:?RunJin
?????runjin000@yahoo.com.cn
分析工具:?softice?,?OD
我的操作系統:?win?2000?sp4?,?win?98
分析對象:?QQ2005賀歲版?珊瑚蟲外掛
為了方便分析,我先把CoralQQ.dll和coralqq.exe先脫殼,這兩個文件加的
都是超弱殼,脫殼過程不在這里多說.
????由于win?nt?平臺和win9x?的差異,珊瑚蟲外掛因系統的不同而分開兩種
工作原理.
????我們都知道,珊瑚外掛是給QQ的主程序QQ.exe外掛了一個Coralqq.dll,
而完成這個工作的就是coralqq.exe?.要加載一個dll文件必須是qq.exe自己
的某個線程執行LoadLibraryA,并且以coralqq.dll為參數,但qq.exe本來根本
沒有這樣的一段代碼,怎么辦?答案很簡單,既然它沒有,那就讓我們幫它加上去,
coralqq.exe就是利用WriteProcessMemory幫QQ.exe加上了這樣一段代碼,并且
改變程序流程,讓qq.exe先加載coralqq.dll再跳到原來的oep執行.
????想了一下,比較合理的方法有:
1.在nt內核的系統上,利用遠程線程的方法,首先用CreateProcess創建QQ.exe
的進程,同時創建了主線程,再用VirtualAllocEx在qq.exe中申請一塊內存,然后把
我們的代碼寫進去,最后用CreateRemoteThread在qq的進程中創建另外一個
線程,其開始執行的地方正是我們自己加入的代碼首地址.
2.先用CreateProcess創建QQ進程和主線程,在QQ的內存空間中找個合理
的地方寫入我們的代碼,然后修改某個地方(例如OEP)使QQ先跳去執行我們
寫入的代碼,加載coralqq.dll,修復原來改過的oep,然后跳回oep讓程序正常執行.
下面就讓我們分析一下珊瑚蟲的外掛是怎樣做到的,首先分析nt平臺上的
運行過程.
用OD載入脫殼后的coralqq.exe,停在下面:
00418E2C?>/$??55?????????????????????????push?ebp
00418E2D??|.??8BEC???????????????????????mov?ebp,esp
00418E2F??|.??83C4?F0????????????????????add?esp,-10
00418E32??|.??B8?648D4100????????????????mov?eax,CoralQQ.00418D64
00418E37??|.??E8?A4BAFEFF????????????????call?CoralQQ.004048E0
00418E3C??|.??A1?F49D4100????????????????mov?eax,dword?ptr?ds:[419DF4]
00418E41??|.??33D2???????????????????????xor?edx,edx
00418E43??|.??E8?30F4FFFF????????????????call?CoralQQ.00418278
00418E48??|.??A1?F49D4100????????????????mov?eax,dword?ptr?ds:[419DF4]
00418E4D??|.??8B00???????????????????????mov?eax,dword?ptr?ds:[eax]
00418E4F??|.??83C0?18????????????????????add?eax,18
00418E52??|.??E8?F9C6FEFF????????????????call?CoralQQ.00405550
00418E57??|.??E8?08A9FEFF????????????????call?CoralQQ.00403764
然后下斷點:?bp?CreateRemoteThread?,然后運行,結果發現,OD根本沒有斷下,
證明珊瑚蟲的外掛沒有使用遠程線程的方法,難道它是用了第二種方法?我們再驗證一下:
首先在OD中bp?CreateProcess,斷下,反回后,用winhex打開QQ.exe的內存,把QQ.exe
的OEP處改為CC,接著在softice中?bpint?3?,在OD中按F9運行,接著就是中斷在softice
中,把oep(464b58)處還原,在再softice下?bpm?464b58?,然后結束程序,再運行coralqq.exe
發現自始至終那個bpm斷點還是沒有斷下,證明珊瑚蟲外掛在2000下也沒有修改QQ.exe
的oep來改變程序流程,暈.沒辦法,只好在OD中下WriteProcessMemory斷點,看看它究竟
修改了哪里.
00231012????57???????????????push?edi
00231013????8B4424?24????????mov?eax,dword?ptr?ss:[esp+24]
00231017????A3?70302300??????mov?dword?ptr?ds:[233070],eax
0023101C????8305?70302300?04?add?dword?ptr?ds:[233070],4
00231023????E8?5C000000??????call?<jmp.&kernel32.CreateProcessA>;創建QQ的進程
上面創建后的QQ主線程是暫停的,不會馬上執行,在win9x下也是這樣.
第一次中斷時堆棧顯示:
0012EBDC???0040C75C??/CALL?到?WriteProcessMemory?來自?CoralQQ.0040C756
0012EBE0???00000018??|hProcess?=?00000018
0012EBE4???5F000000??|Address?=?5F000000
0012EBE8???00CC0F44??|Buffer?=?00CC0F44
0012EBEC???000000D2??|BytesToWrite?=?D2?(210.)
0012EBF0???0012EC68??\pBytesWritten?=?0012EC68
第二次:
0012EC70???00416231??/CALL?到?WriteProcessMemory?來自?CoralQQ.0041622C
0012EC74???00000018??|hProcess?=?00000018
0012EC78???5F010000??|Address?=?5F010000
0012EC7C???0012EE9F??|Buffer?=?0012EE9F
0012EC80???00000025??|BytesToWrite?=?25?(37.)
0012EC84???0012EFD0??\pBytesWritten?=?0012EFD0
第三次:
0012EC70???004162CB??/CALL?到?WriteProcessMemory?來自?CoralQQ.004162C6
0012EC74???00000018??|hProcess?=?00000018
0012EC78???77F84BC0??|Address?=?77F84BC0
0012EC7C???0012EFC3??|Buffer?=?0012EFC3
0012EC80???00000005??|BytesToWrite?=?5
0012EC84???0012EFD0??\pBytesWritten?=?0012EFD0
第四次:
0012EC70???0041632B??/CALL?到?WriteProcessMemory?來自?CoralQQ.00416326
0012EC74???00000018??|hProcess?=?00000018
0012EC78???5F010025??|Address?=?5F010025
0012EC7C???0012EC96??|Buffer?=?0012EC96
0012EC80???00000208??|BytesToWrite?=?208?(520.)
0012EC84???0012EFD0??\pBytesWritten?=?0012EFD0
第五次:
0012EC70???0041634B??/CALL?到?WriteProcessMemory?來自?CoralQQ.00416346
0012EC74???00000018??|hProcess?=?00000018
0012EC78???5F010000??|Address?=?5F010000
0012EC7C???0012EE9F??|Buffer?=?0012EE9F
0012EC80???00000025??|BytesToWrite?=?25?(37.)
0012EC84???0012EFD0??\pBytesWritten?=?0012EFD0
留意第三次中斷:?77F84BC0?對應著:?NtTestAlert??所在庫：ntdll.dll
程序每次執行前都要經過?ntdll.dll?的?NtTestAlert函數,它使函數首句跳到某個
地方,從而改變程序流程.
00417E7E????8B45?F4??????????mov?eax,dword?ptr?ss:[ebp-C]
00417E81????50???????????????push?eax
00417E82????E8?DDCDFEFF??????call?<jmp.&kernel32.ResumeThread>;使得QQ的主線程繼續執行
把?0012efc3?處的E9改為CC,再在softice中bpint?3?,讓其中斷后跟蹤:
001B:77F84BC0??E93BB408E7??????????JMP???????5F010000
單步執行跟蹤
001B:5F010000??B80000015F??????????MOV???????EAX,5F010000
001B:5F010005??B90000005F??????????MOV???????ECX,5F000000
001B:5F01000A??FFD1????????????????CALL??????ECX
此時ecx的值為5F000000
001B:5F000000??55??????????????????PUSH??????EBP
001B:5F000001??8BEC????????????????MOV???????EBP,ESP
001B:5F000003??83C4EC??????????????ADD???????ESP,-14
001B:5F000006??53??????????????????PUSH??????EBX
001B:5F000007??56??????????????????PUSH??????ESI
001B:5F000008??8BD8????????????????MOV???????EBX,EAX
001B:5F00000A??896DFC??????????????MOV???????[EBP-04],EBP
001B:5F00000D??8B431C??????????????MOV???????EAX,[EBX+1C]
001B:5F000010??8B55FC??????????????MOV???????EDX,[EBP-04]
001B:5F000013??83C204??????????????ADD???????EDX,04
001B:5F000016??8902????????????????MOV???????[EDX],EAX
001B:5F000018??8B431C??????????????MOV???????EAX,[EBX+1C]
001B:5F00001B??8945EC??????????????MOV???????[EBP-14],EAX
001B:5F00001E??C745FC05000000??????MOV???????DWORD?PTR?[EBP-04],00000005
001B:5F000025??8D45F8??????????????LEA???????EAX,[EBP-08]
001B:5F000028??50??????????????????PUSH??????EAX
001B:5F000029??6A40????????????????PUSH??????40
001B:5F00002B??8D45FC??????????????LEA???????EAX,[EBP-04]
001B:5F00002E??50??????????????????PUSH??????EAX
001B:5F00002F??8D45EC??????????????LEA???????EAX,[EBP-14]
001B:5F000032??50??????????????????PUSH??????EAX
001B:5F000033??6AFF????????????????PUSH??????FF
001B:5F000035??FF15C600005F????????CALL??????[5F0000C6]
001B:5F00003B??8B431C??????????????MOV???????EAX,[EBX+1C]
001B:5F00003E??8B5320??????????????MOV???????EDX,[EBX+20]
001B:5F000041??8910????????????????MOV???????[EAX],EDX?;恢復Ntdll.NtTestAlert入口處
001B:5F000043??8A5324??????????????MOV???????DL,[EBX+24]
001B:5F000046??885004??????????????MOV???????[EAX+04],DL
001B:5F000049??C745FC05000000??????MOV???????DWORD?PTR?[EBP-04],00000005
001B:5F000050??8D45F8??????????????LEA???????EAX,[EBP-08]
001B:5F000053??50??????????????????PUSH??????EAX
001B:5F000054??8B45F8??????????????MOV???????EAX,[EBP-08]
001B:5F000057??50??????????????????PUSH??????EAX
001B:5F000058??8D45FC??????????????LEA???????EAX,[EBP-04]
001B:5F00005B??50??????????????????PUSH??????EAX
001B:5F00005C??8D45EC??????????????LEA???????EAX,[EBP-14]
001B:5F00005F??50??????????????????PUSH??????EAX
001B:5F000060??6AFF????????????????PUSH??????FF
001B:5F000062??FF15CA00005F????????CALL??????[5F0000CA]
001B:5F000068??8B7318??????????????MOV???????ESI,[EBX+18]
001B:5F00006B??4E??????????????????DEC???????ESI
001B:5F00006C??85F6????????????????TEST??????ESI,ESI
001B:5F00006E??7C4C????????????????JL????????5F0000BC
001B:5F000070??46??????????????????INC???????ESI
001B:5F000071??8D4325??????????????LEA???????EAX,[EBX+25]
001B:5F000074??8BD8????????????????MOV???????EBX,EAX
001B:5F000076??33D2????????????????XOR???????EDX,EDX
001B:5F000078??8BC3????????????????MOV???????EAX,EBX
001B:5F00007A??66833800????????????CMP???????WORD?PTR?[EAX],00
001B:5F00007E??740C????????????????JZ????????5F00008C
001B:5F000080??42??????????????????INC???????EDX
001B:5F000081??83C002??????????????ADD???????EAX,02
001B:5F000084??81FA03010000????????CMP???????EDX,00000103
001B:5F00008A??75EE????????????????JNZ???????5F00007A
001B:5F00008C??8BC2????????????????MOV???????EAX,EDX
001B:5F00008E??03C0????????????????ADD???????EAX,EAX
001B:5F000090??668945F0????????????MOV???????[EBP-10],AX
001B:5F000094??6683C002????????????ADD???????AX,02
001B:5F000098??668945F2????????????MOV???????[EBP-0E],AX
001B:5F00009C??8BC3????????????????MOV???????EAX,EBX
001B:5F00009E??8945F4??????????????MOV???????[EBP-0C],EAX
001B:5F0000A1??8D45FC??????????????LEA???????EAX,[EBP-04]
001B:5F0000A4??50??????????????????PUSH??????EAX
001B:5F0000A5??8D45F0??????????????LEA???????EAX,[EBP-10]
001B:5F0000A8??50??????????????????PUSH??????EAX
001B:5F0000A9??6A00????????????????PUSH??????00
001B:5F0000AB??6A00????????????????PUSH??????00
001B:5F0000AD??FF15CE00005F????????CALL??????[5F0000CE]?;call?LoadLibraryA
001B:5F0000B3??81C308020000????????ADD???????EBX,00000208
001B:5F0000B9??4E??????????????????DEC???????ESI
001B:5F0000BA??75BA????????????????JNZ???????5F000076
001B:5F0000BC??5E??????????????????POP???????ESI
001B:5F0000BD??5B??????????????????POP???????EBX
001B:5F0000BE??8BE5????????????????MOV???????ESP,EBP
001B:5F0000C0??5D??????????????????POP???????EBP
001B:5F0000C1??C3??????????????????RET
001B:5F0000C2??0000????????????????ADD???????[EAX],AL
001B:5F0000C4??0000????????????????ADD???????[EAX],AL
001B:5F0000C6??C4BFF877C4BF????????LES???????EDI,[EDI+BFC477F8]
001B:5F0000CC??F8??????????????????CLC
001B:5F0000CD??7761????????????????JA????????5F000130
001B:5F0000CF??32F8????????????????XOR???????BH,AL
001B:5F0000D1??7700????????????????JA????????5F0000D3
我們再分析一下win9x下珊瑚蟲的外掛又是怎樣運行的.
再次用OD載入Coralqq.exe
00415C9D??mov?dword?ptr?ss:[ebp-C],ecx
00415CA0??mov?dword?ptr?ss:[ebp-4],edx
00415CA3??mov?dword?ptr?ss:[ebp-8],eax
00415CA6??xor?ebx,ebx
00415CA8??call?<jmp.&kernel32.GetVersion>?;判斷操作系統
00415CAD??test?eax,80000000
00415CB2??je?short?CORALQQ.00415CFE
00415CB4??xor?edi,edi
00415CB6??xor?esi,esi
00415CB8??jmp?short?CORALQQ.00415CE7
00415CBA??/cmp?esi,dword?ptr?ss:[ebp-24]
00415CBD??|je?short?CORALQQ.00415CE2
00415CBF??|mov?eax,dword?ptr?ss:[ebp-4]
00415CC2??|mov?edx,dword?ptr?ss:[ebp-24]
00415CC5??|mov?dword?ptr?ds:[eax],edx
00415CC7??|cmp?dword?ptr?ss:[ebp-18],1000
00415CCE??|jnz?short?CORALQQ.00415CDF
00415CD0??|push?ebp??????????????????????????????;?/Arg1
00415CD1??|call?CORALQQ.00415BD4?????????????????;?\CoralQQ.00415BD4
00415CD6??|pop?ecx
00415CD7??|test?al,al
00415CD9??|je?short?CORALQQ.00415CDF
00415CDB??|mov?bl,1
00415CDD??|jmp?short?CORALQQ.00415D29
00415CDF??|mov?esi,dword?ptr?ss:[ebp-24]
00415CE2??|mov?eax,dword?ptr?ss:[ebp-1C]
00415CE5??|add?edi,eax
00415CE7???push?1C???????????????????????????????;?/BufSize?=?1C?(28.)
00415CE9??|lea?eax,dword?ptr?ss:[ebp-28]?????????;?|
00415CEC??|push?eax??????????????????????????????;?|Buffer
00415CED??|push?edi??????????????????????????????;?|Address
00415CEE??|mov?eax,dword?ptr?ss:[ebp-8]??????????;?|
00415CF1??|push?eax??????????????????????????????;?|hProcess
00415CF2??|call?<jmp.&kernel32.VirtualQueryEx>???;?\VirtualQueryEx?獲得內存業面信息
00415CF7??|cmp?eax,1C
00415CFA??\je?short?CORALQQ.00415CBA
00415CFC??jmp?short?CORALQQ.00415D29
上面的代碼是判斷操作系統的版本,如果是win9x的話就先跳到415ce7,
00415A4B??|>?\8>lea?eax,dword?ptr?ss:[ebp-8]
00415A4E??|.??5>push?eax?????????????????????????????????;?/pBytesWritten
00415A4F??|.??5>push?edi?????????????????????????????????;?|BytesToWrite
00415A50??|.??8>mov?eax,dword?ptr?ss:[ebp-4]?????????????;?|
00415A53??|.??5>push?eax?????????????????????????????????;?|Buffer
00415A54??|.??5>push?esi?????????????????????????????????;?|Address
00415A55??|.??5>push?ebx?????????????????????????????????;?|hProcess
00415A56??|.??E>call?<jmp.&kernel32.WriteProcessMemory>??;?\WriteProcessMemory
看一下此時的堆棧:
0067EA5C???0000000C??|hProcess?=?0000000C
0067EA60???83138AAC??|Address?=?83138AAC
0067EA64???0067EABC??|Buffer?=?0067EABC
0067EA68???00000292??|BytesToWrite?=?292?(658.)
0067EA6C???0067EA7C??\pBytesWritten?=?0067EA7C
它把緩沖區?0067eabc的658的字節寫進QQ.exe的內存?83138aac處,在win98下,進程內存中的共享(M
MF)分區是0x80000000~0xbfffffff,所有的內存映射文件和系統共享DLL將加載在這個地址,而
那些映射文件和系統共享DLL往往都在比較高的地址,所以說,從80000000地址對上的一大段地址空間
往往是比較"空閑"的,當然,并不是說這些地址就可以亂讀亂寫,至于這個83138aac的地址值具體是怎樣計算出來的,
我還沒有分析清楚,但我想到另外一種可行的方法,而且經過我自己編程證實,那就是以1000h大小為單位,從80000000
開始用WriteProcessMemory一直往上寫數據,直到寫入成功,證明那段1000h的地址可用,而且1000h
大小的內存空間已經夠我們放代碼的了,之所以用1000h為單位大小,是因為考慮到塊對齊.
繼續跟蹤:
00415A39??|.??8D45?F8????????lea?eax,dword?ptr?ss:[ebp-8]
00415A3C??|.??50?????????????push?eax?????????????????????????????????;?/pOldProtect
00415A3D??|.??6A?40??????????push?40??????????????????????????????????;?|NewProtect?=?PAGE_EXECUTE_READWRITE
00415A3F??|.??57?????????????push?edi?????????????????????????????????;?|Size
00415A40??|.??56?????????????push?esi?????????????????????????????????;?|Address
00415A41??|.??53?????????????push?ebx?????????????????????????????????;?|hProcess
00415A42??|.??E8?85F2FEFF????call?<jmp.&kernel32.VirtualProtectEx>????;?\VirtualProtectEx
上面的代碼是改變QQ.exe的oep處的屬性,使其可讀可寫可執行,為改寫oep處的代碼做準備
接著,又一次中斷在WriteProcessMemory
看看堆棧:
0067EA5C???0000000C??|hProcess?=?0000000C
0067EA60???00464B58??|Address?=?464B58
0067EA64???0067EE46??|Buffer?=?0067EE46
0067EA68???00000005??|BytesToWrite?=?5
0067EA6C???0067EA7C??\pBytesWritten?=?0067EA7C
464b58就是QQ.exe的OEP,很明顯,它要改變oep來改變程序流程!!
????好了,我們又用那套方法,把0067eea6的第一個字節改為cc,在softice中bpint?3,然后中斷,再
跟蹤.
????在softice下中斷后:
0167:00464B58??E91328CE82??????????JMP???????83147370???
0167:83147370??C705584B4600558BEC6AMOV???????DWORD?PTR?[00464B58],6AEC8B55?;馬上恢復oep處的代碼
0167:8314737A??C6055C4B4600FF??????MOV???????BYTE?PTR?[00464B5C],FF
0167:83147381??68FA731483??????????PUSH??????831473FA
0167:83147386??6838000000??????????PUSH??????00000038
0167:8314738B??6A40????????????????PUSH??????40
0167:8314738D??FF15F6731483????????CALL??????[KERNEL32!GlobalAlloc]?;再申請內存
0167:83147393??C700B85077F7????????MOV???????DWORD?PTR?[EAX],F77750B8?;從這里開始一直填入新數據
0167:83147399??C74004BFFFD068??????MOV???????DWORD?PTR?[EAX+04],68D0FFBF
0167:831473A0??C7400870731483??????MOV???????DWORD?PTR?[EAX+08],83147370
0167:831473A7??C7400CB89348E9??????MOV???????DWORD?PTR?[EAX+0C],E94893B8
0167:831473AE??C74010BFFFD0B8??????MOV???????DWORD?PTR?[EAX+10],B8D0FFBF
0167:831473B5??C74014584B4600??????MOV???????DWORD?PTR?[EAX+14],00464B58
0167:831473BC??C74018FFE0C705??????MOV???????DWORD?PTR?[EAX+18],05C7E0FF
0167:831473C3??C7401C584B4600??????MOV???????DWORD?PTR?[EAX+1C],00464B58
0167:831473CA??C74020558BEC6A??????MOV???????DWORD?PTR?[EAX+20],6AEC8B55
0167:831473D1??C74024C6055C4B??????MOV???????DWORD?PTR?[EAX+24],4B5C05C6
0167:831473D8??C740284600FF68??????MOV???????DWORD?PTR?[EAX+28],68FF0046
0167:831473DF??C7402CFA731483??????MOV???????DWORD?PTR?[EAX+2C],831473FA
0167:831473E6??C7403068380000??????MOV???????DWORD?PTR?[EAX+30],00003868
0167:831473ED??C74034006A40FF??????MOV???????DWORD?PTR?[EAX+34],FF406A00
0167:831473F4??FFE0????????????????JMP???????EAX?;此時eax為?0063059C
0167:0063059C??B85077F7BF??????????MOV???????EAX,KERNEL32!LoadLibraryA;加載Coralqq.dll
0167:006305A1??FFD0????????????????CALL??????EAX
0167:006305A3??6870731483??????????PUSH??????83147370
0167:006305A8??B89348E9BF??????????MOV???????EAX,COMCTL32!ORD_0049
0167:006305AD??FFD0????????????????CALL??????EAX
0167:006305AF??B8584B4600??????????MOV???????EAX,00464B58?
0167:006305B4??FFE0????????????????JMP???????EAX?;跳回QQ.exe的入口點
分析完畢.
到了這里,我們可以總結一下了,在win2000/xp下coralqq.exe先創建QQ的進程,同時也就創建了
QQ的暫停的主線程,接著往QQ進程的內存寫入代碼,修改Ntdll.NtTestAlert的代碼跳讓程序跳到自己的
代碼處執行,在執行的過程中恢復Ntdll.NtTestAlert處被改了的代碼,同時加載Coralqq.dll.
在win9x下,coralqq.exe先創建QQ的進程,同時也就創建了QQ的暫停的主線程,接著往QQ.exe的內存
寫數據,改寫QQ.exe的oep從而達到改變程序流程的目的,讓其先執行加入了的代碼,加載Coralqq.dll,
加載完后再跳到原來的QQ.exe的oep繼續執行.
其實在win2000/xp下面完全可以用遠程線程的方法來實現加載dll文件,我后來自己編程實現了外掛
這一步.
????也許有讀者讀完這編文章后會問:"加載了coralqq.dll又有什么用?它是怎樣顯IP的?"
其實,要顯IP當然要修改QQ的內存中的代碼,而修改內存代碼這一步是在加載coralqq.dll的時候由
coralqq.dll完成的.也就是說,在執行LoadLibrary的過程中系統會執行corall.dll的?LibMain?,修改
的過程就在LibMain中完成了!而說到顯IP的原理,抱歉,不在我們這編文章的討論范圍之內,我們只是討論
外掛中"掛"這一步.
下面是我寫的代碼,可以做出一個頂替Coralqq.exe的程序,但原理上和Coralqq.exe有一點點不同
.586
.model?flat,?stdcall
option?casemap?:none???;?case?sensitive
include????????windows.inc
include????????kernel32.inc
includelib????kernel32.lib
.data
qq?db?".\QQ.exe",0
ikeyname?db?"qq",0
isecname?db?"main",0
szBuffer????????dw??50?dup(0)
dllname?db?".\CoralQQ.dll",0
szkernel32?db?"Kernel32.dll",0
dllin?dd?0
szloadlibrary?db?"LoadLibraryA",0
oaddr?dd?0
wriaddr?dd?0
ininame?db?".\CoralQQ.ini",0
.data?
align?dword
con?CONTEXT?<>
align?dword
con2?CONTEXT?<>????
stStartUp????STARTUPINFO?<?>
stProcInfo????PROCESS_INFORMATION?<?>
.code
?start:
?main?proc
????local?wrisize:dword?;用來存放要寫入的代碼的大小
????local?num:dword
????local?oldpro:dword
????local?lastwri:dword
????local?wribase:dword?;用來存放寫入代碼的基址
????invoke?GetPrivateProfileString,offset?isecname,offset?ikeyname,\
????????offset?szloadlibrary,offset?szBuffer,\
????????sizeof?szBuffer,offset?ininame????;從Coralqq.ini中獲取QQ程序的路徑
?????invoke?GetModuleHandle,offset?szkernel32
?????invoke?GetProcAddress,eax,offset?szloadlibrary
?????mov?dllin,eax
?????
???invoke?GetStartupInfo,addr?stStartUp
????invoke?CreateProcess,NULL,offset?szBuffer,NULL,NULL,FALSE,\
????CREATE_SUSPENDED,NULL,NULL,addr?stStartUp,addr?stProcInfo?;創建QQ進程
????cmp?eax,0
????jz?exit
????invoke?GetVersion
?????test?eax,080000000h?;判斷操作系統類型
?????jnz?win9x
????invoke?VirtualAllocEx,stProcInfo.hProcess,NULL,01000h,MEM_COMMIT,\
????PAGE_EXECUTE_READWRITE?;在QQ內存中分配空間
????mov?oaddr,eax
????invoke?WriteProcessMemory,stProcInfo.hProcess,oaddr,offset?dllname,\
????sizeof?dllname,addr?num?;寫入數據
????invoke?CreateRemoteThread,stProcInfo.hProcess,NULL,0,dllin,oaddr,0,\
????addr?num?;創建遠程線程
????invoke????CloseHandle,eax
????invoke?ResumeThread,stProcInfo.hThread?;讓QQ繼續運行
????invoke?ExitProcess,0
????ret
win9x:????
????mov?wribase,oepwrite
????mov?wrisize,codeend-oepwrite
????invoke?VirtualProtect,wribase,wrisize,\
????PAGE_EXECUTE_READWRITE,addr?oldpro?;改變這個程序的要寫入代碼的地方的屬性,其實可以在編譯時加上開關
????
????mov?wrisize,codeend-codewrite
????mov?wriaddr,080000000h
????sub?wriaddr,1000h
again:
????add?wriaddr,1000h
????mov?wribase,codewrite
????invoke?WriteProcessMemory,stProcInfo.hProcess,wriaddr,\
????wribase,wrisize,addr?num?;寫入代碼
????mov?eax,wrisize
????cmp?eax,num
????jnz?again
????
????mov?eax,wriaddr
????mov?ebx,chan0-4
????mov?[ebx],eax
????invoke?VirtualProtectEx,stProcInfo.hProcess,0464b58h,7,\
????PAGE_EXECUTE_READWRITE,addr?oldpro?;改變QQ.exe的oep處的屬性
????mov?wribase,oepwrite
????invoke?WriteProcessMemory,stProcInfo.hProcess,0464b58h,?wribase,7,\
????addr?num?;寫入數據
????
????mov?eax,dllin
????mov?ebx,chan2-4
????mov?[ebx],eax
????mov?eax,codeend-codewrite
????add?eax,wriaddr
????mov?ebx,chan1-4
????mov?[ebx],eax
????mov?wribase,codewrite
????mov?wrisize,codeend-codewrite
????invoke?WriteProcessMemory,stProcInfo.hProcess,wriaddr,\
????wribase,wrisize,addr?num
????
????mov?eax,codeend-codewrite
????add?eax,wriaddr
????mov?lastwri,eax
????invoke?WriteProcessMemory,stProcInfo.hProcess,lastwri,offset?dllname,\
????sizeof?dllname,addr?num
????invoke?ResumeThread,stProcInfo.hThread?;讓QQ繼續執行
????exit:
????invoke?ExitProcess,0
????ret
????????????
main?endp
;下面的都是要寫入到QQ.exe的內存的附加代碼,但有些數值在寫入前要實時修正
oepwrite:
????mov?eax,0
chan0:????jmp?eax
codewrite:?
mov?eax,0464b58h
push??6aec8b55h
pop?[eax]
mov?eax,0464b5ch
push??101868ffh
pop?[eax]
push?080000000
chan1:?
push?464b58h
mov?eax,0
chan2:?
jmp?eax
codeend:
end?start