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 Forums >>  Target Specific - General  >>  ARM Binaries question

Topic created on: December 1, 2009 16:23 CST by goglog .

Hey people,

I'm doing some research on binary obfuscation methods (control-flow obfuscation; dummy code etc.) for arm binaries. I've tried to search google, but surprisingly didn't find anything.

If you any of familiar with tools (preferably open source), articles on the subject, I would really appreciate.

P.S. - I'm interested on obfuscations that run on a disassembled arm binary file (arm asm source).

Thanks

  mihi64     December 4, 2009 19:09.26 CST
      MOV r0, #10   ; Set up parameters
      MOV  r1, #3
      ADD r0, r0, r1   ; r0 = 10 + 3 = 13
can be changed in
      MOV r0, #8   ; Set up parameters
      MOV r1, #5
      XOR r1, r1, r0   ; 8^5=13
or
      MOV r0, #8   ; Set up parameters
      MOV r1, #5
      OR r1, r1, r0   ; 8|5=13

You should read the ARM Instruction Set Manual, IA-32 ISA manual and obfuscation tricks for IA-32 and try to port them to ARM asembler.
There are very few tools for ARM assembly because ARM is used in embedded devices: every program is device specific and portability is not important.

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