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www.waraxe.us Forum Index -> Newbies corner -> Lookin for linux cracking tuts
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Lookin for linux cracking tuts
PostPosted: Mon Jan 23, 2006 11:08 pm Reply with quote
fizzi
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Joined: Sep 14, 2005
Posts: 55




hi everybody
everyone knows cracking in windows. but cracking programs under linux ... somehow impossible without right knowledge.
there is a game out there ... which has a stupid handbook-page/2letters protection. so ... i guess softice doesn't work under linux ... Wink


it's a statically linked file ... how do i disassembly it first and then debug it step by step?
(NO, GDB DOES WORK SHIT HERE) Rolling Eyes
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Re: Lookin for linux cracking tuts
PostPosted: Tue Jan 24, 2006 12:43 pm Reply with quote
erg0t
Valuable expert
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Joined: Apr 08, 2005
Posts: 55
Location: Uruguay




fizzi wrote:
hi everybody
everyone knows cracking in windows. but cracking programs under linux ... somehow impossible without right knowledge.
there is a game out there ... which has a stupid handbook-page/2letters protection. so ... i guess softice doesn't work under linux ... Wink


it's a statically linked file ... how do i disassembly it first and then debug it step by step?
(NO, GDB DOES WORK SHIT HERE) Rolling Eyes


yes gdb sucks for re but is still usable, try strace, it will show you how syscalls are called in a clean way, the other think you can do is disassemble the file, try Bastard, or more simple stuff like HT, objdump maybe...
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PostPosted: Tue Jan 24, 2006 6:32 pm Reply with quote
fizzi
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Joined: Sep 14, 2005
Posts: 55




damn
the only one i got working now is ldasm. all other pograms didn't want to compile (because of severail things, i guess my amd64 arch is problem #1), but also the compiled programs i downloaded didn't want to work. (missing own libs and stuff)
argh
anway ... what is HT?
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PostPosted: Tue Jan 24, 2006 6:38 pm Reply with quote
fizzi
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Joined: Sep 14, 2005
Posts: 55




mhm
i tried strace ... but it does not get any output itself from the program. perhaps the coders used a workaround to hide their code from beeing traced by such simple standard linux tools.
Quote:
execve("./program.bin.x86", ["program.bin.x86"], [/* XX vars */]) = 0
--- SIGTERM (Terminated) @ 0 (0) ---
PROGRAM OUTPUT BLA BLA BLA
...
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PostPosted: Tue Jan 24, 2006 11:08 pm Reply with quote
erg0t
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Joined: Apr 08, 2005
Posts: 55
Location: Uruguay




fizzi wrote:
mhm
i tried strace ... but it does not get any output itself from the program. perhaps the coders used a workaround to hide their code from beeing traced by such simple standard linux tools.
Quote:
execve("./program.bin.x86", ["program.bin.x86"], [/* XX vars */]) = 0
--- SIGTERM (Terminated) @ 0 (0) ---
PROGRAM OUTPUT BLA BLA BLA
...


HT is an editor and disassembler that suports, ELF, PE, etc
try strace -f
If still doesn't work is becuase there is some ant-dbg trick, like using ptrace or sending itself a sigtrap.
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PostPosted: Tue Jan 24, 2006 11:27 pm Reply with quote
fizzi
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Joined: Sep 14, 2005
Posts: 55




strace -f didn't even helped in that case.
but objdump -d is doing a good job so far.
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Lookin for linux cracking tuts
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