import angrimport monkeyhex # this will format numerical results in hexadecimal#Load binaryproj = angr.Project('/bin/true')#BASIC BINARY DATAproj.arch #Get arch "<Arch AMD64 (LE)>"proj.arch.name #'AMD64'proj.arch.memory_endness #'Iend_LE'proj.entry #Get entrypoint "0x4023c0"proj.filename #Get filename "/bin/true"#There are specific options to load binaries#Usually you won't need to use them but you couldangr.Project('examples/fauxware/fauxware', main_opts={'backend': 'blob', 'arch': 'i386'}, lib_opts={'libc.so.6': {'backend': 'elf'}})
strcmp = proj.loader.find_symbol('strcmp')#<Symbol "strcmp" in libc.so.6 at 0x1089cd0>strcmp.name #'strcmp'strcmp.owne #<ELF Object libc-2.23.so, maps [0x1000000:0x13c999f]>strcmp.rebased_addr #0x1089cd0strcmp.linked_addr #0x89cd0strcmp.relative_addr #0x89cd0strcmp.is_export #True, as 'strcmp' is a function exported by libc#Get strcmp from the main objectmain_strcmp = proj.loader.main_object.get_symbol('strcmp')main_strcmp.is_export #Falsemain_strcmp.is_import #Truemain_strcmp.resolvedby #<Symbol "strcmp" in libc.so.6 at 0x1089cd0>
Vizio
#Blocksblock = proj.factory.block(proj.entry)#Get the block of the entrypoint fo the binaryblock.pp()#Print disassembly of the blockblock.instructions #"0xb" Get number of instructionsblock.instruction_addrs #Get instructions addresses "[0x401670, 0x401672, 0x401675, 0x401676, 0x401679, 0x40167d, 0x40167e, 0x40167f, 0x401686, 0x40168d, 0x401694]"
Uchambuzi wa Kihisia
Meneja wa Simuleringi, Hali
#Live States#This is useful to modify content in a live analysisstate = proj.factory.entry_state()state.regs.rip #Get the RIPstate.mem[proj.entry].int.resolved #Resolve as a C int (BV)state.mem[proj.entry].int.concreteved #Resolve as python intstate.regs.rsi = state.solver.BVV(3, 64)#Modify RIPstate.mem[0x1000].long =4#Modify mem#Other Statesproject.factory.entry_state()project.factory.blank_state()#Most of its data left uninitializedproject.factory.full_init_statetate() #Execute through any initializers that need to be run before the main binary's entry point
project.factory.call_state()#Ready to execute a given function.#Simulation manager#The simulation manager stores all the states across the execution of the binarysimgr = proj.factory.simulation_manager(state)#Startsimgr.step()#Execute one stepsimgr.active[0].regs.rip #Get RIP from the last state
Calling functions
Unaweza kupitisha orodha ya hoja kupitia args na kamusi ya mabadiliko ya mazingira kupitia env katika entry_state na full_init_state. Thamani katika muundo hii zinaweza kuwa nyuzi au bitvectors, na zitaandikwa katika hali kama hoja na mazingira kwa utekelezaji ulioigwa. args ya default ni orodha tupu, hivyo ikiwa programu unayoichambua inatarajia kupata angalau argv[0], unapaswa kila wakati kutoa hiyo!
Ikiwa ungependa kuwa argc ni ya alama, unaweza kupitisha bitvector ya alama kama argc kwa wajenzi wa entry_state na full_init_state. Kuwa makini, ingawa: ikiwa utafanya hivi, unapaswa pia kuongeza kizuizi kwa hali inayotokana ambayo thamani yako ya argc haiwezi kuwa kubwa zaidi kuliko idadi ya hoja ulizopitisha katika args.
Ili kutumia hali ya wito, unapaswa kuitwa na .call_state(addr, arg1, arg2, ...), ambapo addr ni anwani ya kazi unayotaka kuita na argN ni hoja ya Nth kwa kazi hiyo, iwe kama nambari ya python, nyuzi, au array, au bitvector. Ikiwa unataka kuwa na kumbukumbu iliyotengwa na kwa kweli kupitisha kiashiria kwa kitu, unapaswa kuifunga katika PointerWrapper, yaani angr.PointerWrapper("point to me!"). Matokeo ya API hii yanaweza kuwa yasiyotabirika kidogo, lakini tunafanya kazi juu yake.
BitVectors
#BitVectorsstate = proj.factory.entry_state()bv = state.solver.BVV(0x1234, 32)#Create BV of 32bits with the value "0x1234"state.solver.eval(bv)#Convert BV to python intbv.zero_extend(30)#Will add 30 zeros on the left of the bitvectorbv.sign_extend(30)#Will add 30 zeros or ones on the left of the BV extending the sign
BitVector za Kihesabu na Vikwazo
x = state.solver.BVS("x", 64)#Symbolic variable BV of length 64y = state.solver.BVS("y", 64)#Symbolic oprationstree = (x +1) / (y +2)tree #<BV64 (x_9_64 + 0x1) / (y_10_64 + 0x2)>tree.op #'__floordiv__' Access last operationtree.args #(<BV64 x_9_64 + 0x1>, <BV64 y_10_64 + 0x2>)tree.args[0].op #'__add__' Access of dirst argtree.args[0].args #(<BV64 x_9_64>, <BV64 0x1>)tree.args[0].args[1].op #'BVV'tree.args[0].args[1].args #(1, 64)#Symbolic constraints solverstate = proj.factory.entry_state()#Get a fresh state without constraintsinput= state.solver.BVS('input', 64)operation = (((input+4) *3) >>1) +inputoutput =200state.solver.add(operation == output)state.solver.eval(input)#0x3333333333333381state.solver.add(input<2**32)state.satisfiable()#False#Solver solutionssolver.eval(expression)#one possible solutionsolver.eval_one(expression)#solution to the given expression, or throw an error if more than one solution is possible.solver.eval_upto(expression, n) #n solutions to the given expression, returning fewer than n if fewer than n are possible.
solver.eval_atleast(expression, n) #n solutions to the given expression, throwing an error if fewer than n are possible.
solver.eval_exact(expression, n) #n solutions to the given expression, throwing an error if fewer or more than are possible.
solver.min(expression)#minimum possible solution to the given expression.solver.max(expression)#maximum possible solution to the given expression.
Hooking
>>> stub_func = angr.SIM_PROCEDURES['stubs']['ReturnUnconstrained'] # this is a CLASS>>> proj.hook(0x10000, stub_func())# hook with an instance of the class>>> proj.is_hooked(0x10000)# these functions should be pretty self-explanitoryTrue>>> proj.hooked_by(0x10000)<ReturnUnconstrained>>>> proj.unhook(0x10000)>>>@proj.hook(0x20000, length=5)... defmy_hook(state):... state.regs.rax =1>>> proj.is_hooked(0x20000)True
Zaidi ya hayo, unaweza kutumia proj.hook_symbol(name, hook), ukitoa jina la alama kama hoja ya kwanza, kuunganisha anwani ambapo alama hiyo inapatikana
