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v0.1.3
Miasm adalah kerangka rekayasa balik sumber terbuka dan gratis (GPLv2). Miasm bertujuan untuk menganalisis/memodifikasi/menghasilkan program biner. Berikut adalah daftar fitur yang tidak lengkap:
Lihat blog resmi untuk contoh dan demo lebih lanjut.
Impor arsitektur Miasm x86:
>>> from miasm.arch.x86.arch import mn_x86
>>> from miasm.core.locationdb import LocationDBDapatkan db lokasi:
>>> loc_db = LocationDB()Merakit garis:
>>> l = mn_x86.fromstring( ' XOR ECX, ECX ' , loc_db, 32 )
>>> print (l)
XOR ECX, ECX
>>> mn_x86.asm(l)
['1xc9', '3xc9', 'g1xc9', 'g3xc9']Ubah operan:
>>> l.args[ 0 ] = mn_x86.regs. EAX
>>> print (l)
XOR EAX, ECX
>>> a = mn_x86.asm(l)
>>> print (a)
['1xc8', '3xc1', 'g1xc8', 'g3xc1']Bongkar hasilnya:
>>> print (mn_x86.dis(a[ 0 ], 32 ))
XOR EAX, ECX Menggunakan abstraksi Machine :
>>> from miasm.analysis.machine import Machine
>>> mn = Machine( ' x86_32 ' ).mn
>>> print (mn.dis( ' x33x30 ' , 32 ))
XOR ESI, DWORD PTR [EAX]Untuk MIPS:
>>> mn = Machine( ' mips32b ' ).mn
>>> print (mn.dis( b ' x97xa3x00 ' , " b " ))
LHU V1, 0x20(SP)Buat instruksi:
>>> machine = Machine( ' arml ' )
>>> instr = machine.mn.dis( ' x00 x88xe0 ' , ' l ' )
>>> print (instr)
ADD R2, R8, R0Buat objek representasi perantara:
>>> lifter = machine.lifter_model_call(loc_db)Buat ircfg kosong:
>>> ircfg = lifter.new_ircfg()Tambahkan instruksi ke kolam:
>>> lifter.add_instr_to_ircfg(instr, ircfg)Cetak kumpulan saat ini:
>>> for lbl, irblock in ircfg.blocks.items():
... print (irblock)
loc_0:
R2 = R8 + R0
IRDst = loc_4
Bekerja dengan IR, misalnya dengan mendapatkan efek samping:
>>> for lbl, irblock in ircfg.blocks.items():
... for assignblk in irblock:
... rw = assignblk.get_rw()
... for dst, reads in rw.items():
... print ( ' read: ' , [ str (x) for x in reads])
... print ( ' written: ' , dst)
... print ()
...
read: ['R8', 'R0']
written: R2
read: []
written: IRDst
Informasi lebih lanjut tentang Miasm IR ada di Notebook Jupyter yang sesuai.
Memberikan kode shell:
00000000 8d4904 lea ecx, [ecx+0x4]
00000003 8d5b01 lea ebx, [ebx+0x1]
00000006 80f901 cmp cl, 0x1
00000009 7405 jz 0x10
0000000b 8d5bff lea ebx, [ebx-1]
0000000e eb03 jmp 0x13
00000010 8d5b01 lea ebx, [ebx+0x1]
00000013 89d8 mov eax, ebx
00000015 c3 ret
>>> s = b ' x8d I x04x8d [ x01x80xf9x01 t x05x8d [ xffxebx03x8d [ x01x89xd8xc3 ' Impor kode shell berkat abstraksi Container :
>>> from miasm.analysis.binary import Container
>>> c = Container.from_string(s, loc_db)
>>> c
Membongkar shellcode pada alamat 0 :
>>> from miasm.analysis.machine import Machine
>>> machine = Machine( ' x86_32 ' )
>>> mdis = machine.dis_engine(c.bin_stream, loc_db = loc_db)
>>> asmcfg = mdis.dis_multiblock( 0 )
>>> for block in asmcfg.blocks:
... print (block)
...
loc_0
LEA ECX, DWORD PTR [ECX + 0x4]
LEA EBX, DWORD PTR [EBX + 0x1]
CMP CL, 0x1
JZ loc_10
-> c_next:loc_b c_to:loc_10
loc_10
LEA EBX, DWORD PTR [EBX + 0x1]
-> c_next:loc_13
loc_b
LEA EBX, DWORD PTR [EBX + 0xFFFFFFFF]
JMP loc_13
-> c_to:loc_13
loc_13
MOV EAX, EBX
RETMenginisialisasi mesin JIT dengan tumpukan:
>>> jitter = machine.jitter(loc_db, jit_type = ' python ' )
>>> jitter.init_stack()Tambahkan kode shell di lokasi memori sembarang:
>>> run_addr = 0x 40000000
>>> from miasm.jitter.csts import PAGE_READ , PAGE_WRITE
>>> jitter.vm.add_memory_page(run_addr, PAGE_READ | PAGE_WRITE , s)Buat sentinelle untuk menangkap kembalinya shellcode:
def code_sentinelle ( jitter ):
jitter . running = False
jitter . pc = 0
return True
> >> jitter . add_breakpoint ( 0x1337beef , code_sentinelle )
> >> jitter . push_uint32_t ( 0x1337beef )Log aktif:
>>> jitter.set_trace_log()Jalankan di alamat sewenang-wenang:
>>> jitter.init_run(run_addr)
>>> jitter.continue_run()
RAX 0000000000000000 RBX 0000000000000000 RCX 0000000000000000 RDX 0000000000000000
RSI 0000000000000000 RDI 0000000000000000 RSP 000000000123FFF8 RBP 0000000000000000
zf 0000000000000000 nf 0000000000000000 of 0000000000000000 cf 0000000000000000
RIP 0000000040000000
40000000 LEA ECX, DWORD PTR [ECX+0x4]
RAX 0000000000000000 RBX 0000000000000000 RCX 0000000000000004 RDX 0000000000000000
RSI 0000000000000000 RDI 0000000000000000 RSP 000000000123FFF8 RBP 0000000000000000
zf 0000000000000000 nf 0000000000000000 of 0000000000000000 cf 0000000000000000
....
4000000e JMP loc_0000000040000013:0x40000013
RAX 0000000000000000 RBX 0000000000000000 RCX 0000000000000004 RDX 0000000000000000
RSI 0000000000000000 RDI 0000000000000000 RSP 000000000123FFF8 RBP 0000000000000000
zf 0000000000000000 nf 0000000000000000 of 0000000000000000 cf 0000000000000000
RIP 0000000040000013
40000013 MOV EAX, EBX
RAX 0000000000000000 RBX 0000000000000000 RCX 0000000000000004 RDX 0000000000000000
RSI 0000000000000000 RDI 0000000000000000 RSP 000000000123FFF8 RBP 0000000000000000
zf 0000000000000000 nf 0000000000000000 of 0000000000000000 cf 0000000000000000
RIP 0000000040000013
40000015 RET
>>>
Berinteraksi dengan jitter:
>>> jitter.vm
ad 1230000 size 10000 RW_ hpad 0x2854b40
ad 40000000 size 16 RW_ hpad 0x25e0ed0
>>> hex (jitter.cpu. EAX )
'0x0L'
>>> jitter.cpu. ESI = 12 Menginisialisasi kumpulan IR:
>>> lifter = machine.lifter_model_call(loc_db)
>>> ircfg = lifter.new_ircfg_from_asmcfg(asmcfg)Menginisialisasi mesin dengan nilai simbolik default:
>>> from miasm.ir.symbexec import SymbolicExecutionEngine
>>> sb = SymbolicExecutionEngine(lifter)Meluncurkan eksekusi:
>>> symbolic_pc = sb.run_at(ircfg, 0 )
>>> print (symbolic_pc)
((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)Sama, dengan log langkah (hanya perubahan yang ditampilkan):
>>> sb = SymbolicExecutionEngine(lifter, machine.mn.regs.regs_init)
>>> symbolic_pc = sb.run_at(ircfg, 0 , step = True )
Instr LEA ECX, DWORD PTR [ECX + 0x4]
Assignblk:
ECX = ECX + 0x4
________________________________________________________________________________
ECX = ECX + 0x4
________________________________________________________________________________
Instr LEA EBX, DWORD PTR [EBX + 0x1]
Assignblk:
EBX = EBX + 0x1
________________________________________________________________________________
EBX = EBX + 0x1
ECX = ECX + 0x4
________________________________________________________________________________
Instr CMP CL, 0x1
Assignblk:
zf = (ECX[0:8] + -0x1)?(0x0,0x1)
nf = (ECX[0:8] + -0x1)[7:8]
pf = parity((ECX[0:8] + -0x1) & 0xFF)
of = ((ECX[0:8] ^ (ECX[0:8] + -0x1)) & (ECX[0:8] ^ 0x1))[7:8]
cf = (((ECX[0:8] ^ 0x1) ^ (ECX[0:8] + -0x1)) ^ ((ECX[0:8] ^ (ECX[0:8] + -0x1)) & (ECX[0:8] ^ 0x1)))[7:8]
af = ((ECX[0:8] ^ 0x1) ^ (ECX[0:8] + -0x1))[4:5]
________________________________________________________________________________
af = (((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[4:5]
pf = parity((ECX + 0x4)[0:8] + 0xFF)
zf = ((ECX + 0x4)[0:8] + 0xFF)?(0x0,0x1)
ECX = ECX + 0x4
of = ((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1))[7:8]
nf = ((ECX + 0x4)[0:8] + 0xFF)[7:8]
cf = (((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1)) ^ ((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[7:8]
EBX = EBX + 0x1
________________________________________________________________________________
Instr JZ loc_key_1
Assignblk:
IRDst = zf?(loc_key_1,loc_key_2)
EIP = zf?(loc_key_1,loc_key_2)
________________________________________________________________________________
af = (((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[4:5]
EIP = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
pf = parity((ECX + 0x4)[0:8] + 0xFF)
IRDst = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
zf = ((ECX + 0x4)[0:8] + 0xFF)?(0x0,0x1)
ECX = ECX + 0x4
of = ((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1))[7:8]
nf = ((ECX + 0x4)[0:8] + 0xFF)[7:8]
cf = (((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1)) ^ ((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[7:8]
EBX = EBX + 0x1
________________________________________________________________________________
>>>Coba lagi eksekusi dengan ECX konkret. Di sini, eksekusi simbolik/concolic mencapai akhir shellcode:
>>> from miasm.expression.expression import ExprInt
>>> sb.symbols[machine.mn.regs. ECX ] = ExprInt( - 3 , 32 )
>>> symbolic_pc = sb.run_at(ircfg, 0 , step = True )
Instr LEA ECX, DWORD PTR [ECX + 0x4]
Assignblk:
ECX = ECX + 0x4
________________________________________________________________________________
af = (((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[4:5]
EIP = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
pf = parity((ECX + 0x4)[0:8] + 0xFF)
IRDst = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
zf = ((ECX + 0x4)[0:8] + 0xFF)?(0x0,0x1)
ECX = 0x1
of = ((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1))[7:8]
nf = ((ECX + 0x4)[0:8] + 0xFF)[7:8]
cf = (((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1)) ^ ((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[7:8]
EBX = EBX + 0x1
________________________________________________________________________________
Instr LEA EBX, DWORD PTR [EBX + 0x1]
Assignblk:
EBX = EBX + 0x1
________________________________________________________________________________
af = (((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[4:5]
EIP = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
pf = parity((ECX + 0x4)[0:8] + 0xFF)
IRDst = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
zf = ((ECX + 0x4)[0:8] + 0xFF)?(0x0,0x1)
ECX = 0x1
of = ((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1))[7:8]
nf = ((ECX + 0x4)[0:8] + 0xFF)[7:8]
cf = (((((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8]) & ((ECX + 0x4)[0:8] ^ 0x1)) ^ ((ECX + 0x4)[0:8] + 0xFF) ^ (ECX + 0x4)[0:8] ^ 0x1)[7:8]
EBX = EBX + 0x2
________________________________________________________________________________
Instr CMP CL, 0x1
Assignblk:
zf = (ECX[0:8] + -0x1)?(0x0,0x1)
nf = (ECX[0:8] + -0x1)[7:8]
pf = parity((ECX[0:8] + -0x1) & 0xFF)
of = ((ECX[0:8] ^ (ECX[0:8] + -0x1)) & (ECX[0:8] ^ 0x1))[7:8]
cf = (((ECX[0:8] ^ 0x1) ^ (ECX[0:8] + -0x1)) ^ ((ECX[0:8] ^ (ECX[0:8] + -0x1)) & (ECX[0:8] ^ 0x1)))[7:8]
af = ((ECX[0:8] ^ 0x1) ^ (ECX[0:8] + -0x1))[4:5]
________________________________________________________________________________
af = 0x0
EIP = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
pf = 0x1
IRDst = ((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x2
________________________________________________________________________________
Instr JZ loc_key_1
Assignblk:
IRDst = zf?(loc_key_1,loc_key_2)
EIP = zf?(loc_key_1,loc_key_2)
________________________________________________________________________________
af = 0x0
EIP = 0x10
pf = 0x1
IRDst = 0x10
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x2
________________________________________________________________________________
Instr LEA EBX, DWORD PTR [EBX + 0x1]
Assignblk:
EBX = EBX + 0x1
________________________________________________________________________________
af = 0x0
EIP = 0x10
pf = 0x1
IRDst = 0x10
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x3
________________________________________________________________________________
Instr LEA EBX, DWORD PTR [EBX + 0x1]
Assignblk:
IRDst = loc_key_3
________________________________________________________________________________
af = 0x0
EIP = 0x10
pf = 0x1
IRDst = 0x13
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x3
________________________________________________________________________________
Instr MOV EAX, EBX
Assignblk:
EAX = EBX
________________________________________________________________________________
af = 0x0
EIP = 0x10
pf = 0x1
IRDst = 0x13
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x3
EAX = EBX + 0x3
________________________________________________________________________________
Instr RET
Assignblk:
IRDst = @32[ESP[0:32]]
ESP = {ESP[0:32] + 0x4 0 32}
EIP = @32[ESP[0:32]]
________________________________________________________________________________
af = 0x0
EIP = @32[ESP]
pf = 0x1
IRDst = @32[ESP]
zf = 0x1
ECX = 0x1
of = 0x0
nf = 0x0
cf = 0x0
EBX = EBX + 0x3
ESP = ESP + 0x4
EAX = EBX + 0x3
________________________________________________________________________________
>>>Miasm menyematkan disassembler, bahasa perantara, dan semantik instruksinya sendiri. Itu ditulis dengan Python.
Untuk meniru kode, ia menggunakan LLVM, GCC, Clang atau Python untuk JIT representasi perantara. Itu dapat meniru kode shell dan semua atau sebagian biner. Callback Python dapat dieksekusi untuk berinteraksi dengan eksekusi, misalnya untuk meniru efek fungsi perpustakaan.
Beberapa sumber dokumentasi tersedia di folder doc.
Dokumentasi yang dibuat secara otomatis tersedia:
Miasme menggunakan:
Untuk mengaktifkan kode JIT, salah satu modul berikut wajib diisi:
Miasm 'opsional' juga dapat menggunakan:
Untuk menggunakan jitter, disarankan GCC atau LLVM
pip install llvmlite atau instal dari llvmlite$ cd miasm_directory
$ python setup.py build
$ sudo python setup.py installJika terjadi kesalahan selama salah satu kompilasi modul jitter, Miasm akan melewatkan kesalahan tersebut dan menonaktifkan modul terkait (lihat keluaran kompilasi).
Sebagian besar plugin IDA Miasm menggunakan subset fungsi Miasm. Cara cepat agar mereka berfungsi adalah dengan menambahkan:
pyparsing.py ke C:...IDApython atau pip install pyparsingmiasm/miasm ke C:...IDApythonSemua fitur kecuali yang terkait JITter akan tersedia. Untuk instalasi lebih lengkap, silakan merujuk ke paragraf di atas.
Miasm hadir dengan serangkaian tes regresi. Untuk menjalankan semuanya:
cd miasm_directory/test
# Run tests using our own test runner
python test_all.py
# Run tests using standard frameworks (slower, require 'parameterized')
python -m unittest test_all.py # sequential, requires 'unittest'
python -m pytest test_all.py # sequential, requires 'pytest'
python -m pytest -n auto test_all.py # parallel, requires 'pytest' and 'pytest-xdist'Beberapa opsi dapat ditentukan:
-m-c-t long (tidak termasuk tes panjang)
