flat assembler
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> Macroinstructions > Encrypt a file and embed into the program through macros |
Author |
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JohnFound 21 Oct 2014, 19:10
Provide some of your not working code...
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21 Oct 2014, 19:10 |
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m3ntal 23 Oct 2014, 02:48
Not on PC, but this should work:
Code: macro load.encrypt name { local p, i virtual at 0 p:: file name file.size=$ end virtual i=0 while i<file.size load a byte from p:i db (a xor 10101010b) i=i+1 end while } |
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23 Oct 2014, 02:48 |
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redsock 23 Oct 2014, 04:51
Without much difficulty, you could modify my ARC4 c-string obfuscator macro, as it would be considerably better than a simple XOR:
Code: ; ; rc4str.inc: nasty little macro to prevent our cstring kak from ending up in the cleartext in our resultant exe ; done only because i hate people being able to just willy-nilly modify string tables in binaries ; ; so, first up: the static rc4 table, initialized by a lovely string of cursing like a longshoreman, hahah if used rc4 align 16 rc4 db 0x46, 0xbc, 0x34, 0xcb, 0x1c, 0x11, 0xbd, 0xe2, 0x2a, 0x64, 0x4f, 0x95, 0x66, 0x48, 0xdd, 0x4d, \ 0x7d, 0xc5, 0x4c, 0x79, 0x55, 0x8a, 0xf7, 0xed, 0x54, 0x27, 0x83, 0x14, 0x0f, 0x1d, 0xb8, 0x47, \ 0xc2, 0x45, 0x59, 0xe8, 0x81, 0x78, 0xa6, 0x88, 0xb7, 0x38, 0x53, 0x02, 0x96, 0x37, 0x6e, 0xf4, \ 0x82, 0x10, 0x67, 0x71, 0x94, 0xba, 0xff, 0x6c, 0x57, 0x22, 0x44, 0xcc, 0x12, 0xd7, 0xc3, 0x9c, \ 0xd0, 0xcf, 0x98, 0x1f, 0xfb, 0xa3, 0x58, 0xc1, 0x5f, 0x20, 0x99, 0xf8, 0x1b, 0x9b, 0x13, 0x87, \ 0x16, 0xa1, 0x33, 0x75, 0xde, 0x5a, 0x01, 0x06, 0x7c, 0x3d, 0x91, 0x0a, 0x0e, 0x77, 0x24, 0x05, \ 0x9f, 0x39, 0x03, 0xf2, 0xf9, 0xe0, 0x90, 0xf5, 0xdc, 0x2c, 0x19, 0x08, 0xa9, 0x6d, 0x0b, 0xc8, \ 0xad, 0x92, 0x3a, 0x09, 0x1a, 0x60, 0xd8, 0x84, 0xb2, 0x6a, 0x70, 0xae, 0x6f, 0x56, 0xce, 0xd1, \ 0x69, 0xb3, 0x9e, 0x25, 0x4e, 0x32, 0x28, 0xc7, 0x8c, 0x5d, 0xef, 0xaa, 0xcd, 0x31, 0x93, 0x6b, \ 0xab, 0x9d, 0xb4, 0xe6, 0x3e, 0x7e, 0x51, 0xc9, 0xe5, 0x0d, 0xa5, 0xa0, 0x04, 0x80, 0xfd, 0x2e, \ 0x4a, 0x5c, 0xdb, 0x2f, 0x8b, 0xb9, 0xac, 0x1e, 0xf3, 0x65, 0xf1, 0xe3, 0xfc, 0x85, 0x40, 0x2b, \ 0x17, 0x49, 0x21, 0xa2, 0x62, 0xb6, 0xd4, 0xee, 0xd3, 0xd6, 0x0c, 0x29, 0xd5, 0x86, 0xbb, 0xb0, \ 0x42, 0x9a, 0x3b, 0x97, 0xeb, 0xa7, 0x7b, 0xfa, 0x89, 0xca, 0xaf, 0x8f, 0x41, 0x07, 0x68, 0x43, \ 0xec, 0xc6, 0x5e, 0x18, 0x35, 0x23, 0x72, 0xb1, 0x15, 0x7f, 0xa8, 0x36, 0xe9, 0xd9, 0x30, 0x50, \ 0xe7, 0xb5, 0xf0, 0x3f, 0xbf, 0xc0, 0xf6, 0xe4, 0x26, 0x00, 0x74, 0x76, 0x4b, 0xfe, 0xa4, 0xe1, \ 0x73, 0x61, 0x5b, 0x7a, 0xdf, 0x3c, 0x2d, 0x8e, 0xda, 0xea, 0xbe, 0x52, 0x8d, 0xd2, 0xc4, 0x63 end if ; this macro is the goods, and gets used like: ; rc4str label_name, 'Label Contents' macro rc4str name*,val* { local AA,BB,DD,CH,I,J,T,Si,Sj,.WTF name dq AA .WTF: du val BB = ($ - .WTF) AA = BB shr 1 align 16 DD = ($ - name) I = 0 J = 0 repeat DD ; get our rc4 next() I = (I+1) and 0xff load Si byte from rc4+I J = (J + Si) and 0xff T = Si load Sj byte from rc4+J ; store byte Sj at rc4+I we do _not_ modify the RC4 table here, and if we did, we'd want it to be a copy so it could be reset... ; store byte T at rc4+J but since all we are really doing is short-string obfuscating, it is all good Si = Sj Sj = T ; next = S[(t+S[i])&255] T = (T + Si) and 0xff load NEXT byte from rc4+T load CH byte from name+(%-1) ; display CH CH = CH xor NEXT store byte CH at name+(%-1) end repeat } |
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23 Oct 2014, 04:51 |
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3ric 26 Oct 2014, 21:31
thanks a lot guys...
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26 Oct 2014, 21:31 |
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