Miasm 是一個免費開源 (GPLv2) 逆向工程框架。 Miasm 旨在分析/修改/產生二進位程式。以下是功能的非詳盡清單:
更多範例和演示請參閱官方部落格。
導入 Miasm x86 架構:
>>> from miasm.arch.x86.arch import mn_x86
>>> from miasm.core.locationdb import LocationDB
取得位置資料庫:
>>> loc_db = LocationDB()
組裝一條線:
>>> l = mn_x86.fromstring( ' XOR ECX, ECX ' , loc_db, 32 )
>>> print (l)
XOR ECX, ECX
>>> mn_x86.asm(l)
['1xc9', '3xc9', 'g1xc9', 'g3xc9']
修改操作數:
>>> l.args[ 0 ] = mn_x86.regs. EAX
>>> print (l)
XOR EAX, ECX
>>> a = mn_x86.asm(l)
>>> print (a)
['1xc8', '3xc1', 'g1xc8', 'g3xc1']
反彙編結果:
>>> print (mn_x86.dis(a[ 0 ], 32 ))
XOR EAX, ECX
使用Machine
抽象:
>>> from miasm.analysis.machine import Machine
>>> mn = Machine( ' x86_32 ' ).mn
>>> print (mn.dis( ' x33x30 ' , 32 ))
XOR ESI, DWORD PTR [EAX]
對於 MIPS:
>>> mn = Machine( ' mips32b ' ).mn
>>> print (mn.dis( b ' x97xa3x00 ' , " b " ))
LHU V1, 0x20(SP)
建立指令:
>>> machine = Machine( ' arml ' )
>>> instr = machine.mn.dis( ' x00 x88xe0 ' , ' l ' )
>>> print (instr)
ADD R2, R8, R0
建立一個中間表示物件:
>>> lifter = machine.lifter_model_call(loc_db)
建立一個空的 ircfg:
>>> ircfg = lifter.new_ircfg()
在池中新增指令:
>>> lifter.add_instr_to_ircfg(instr, ircfg)
列印目前池:
>>> for lbl, irblock in ircfg.blocks.items():
... print (irblock)
loc_0:
R2 = R8 + R0
IRDst = loc_4
使用 IR,例如透過獲得副作用:
>>> 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
有關 Miasm IR 的更多資訊請參閱相應的 Jupyter Notebook。
給出一個shellcode:
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 '
透過Container
抽象導入 shellcode:
>>> from miasm.analysis.binary import Container
>>> c = Container.from_string(s, loc_db)
>>> c
反組譯地址0
處的 shellcode:
>>> 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
RET
使用堆疊初始化 JIT 引擎:
>>> jitter = machine.jitter(loc_db, jit_type = ' python ' )
>>> jitter.init_stack()
將 shellcode 新增到任意記憶體位置:
>>> 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)
建立一個哨兵來捕捉 shellcode 的回傳:
def code_sentinelle ( jitter ):
jitter . running = False
jitter . pc = 0
return True
> >> jitter . add_breakpoint ( 0x1337beef , code_sentinelle )
> >> jitter . push_uint32_t ( 0x1337beef )
活動日誌:
>>> jitter.set_trace_log()
在任意地址運行:
>>> 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
>>>
與抖動互動:
>>> 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
初始化IR池:
>>> lifter = machine.lifter_model_call(loc_db)
>>> ircfg = lifter.new_ircfg_from_asmcfg(asmcfg)
使用預設符號值初始化引擎:
>>> from miasm.ir.symbexec import SymbolicExecutionEngine
>>> sb = SymbolicExecutionEngine(lifter)
啟動執行:
>>> symbolic_pc = sb.run_at(ircfg, 0 )
>>> print (symbolic_pc)
((ECX + 0x4)[0:8] + 0xFF)?(0xB,0x10)
相同,帶有步驟日誌(僅顯示變更):
>>> 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
________________________________________________________________________________
>>>
使用具體的 ECX 重試執行。在這裡,符號/並發執行到達 shellcode 的末尾:
>>> 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 嵌入了自己的反彙編程式、中間語言和指令語義。它是用 Python 編寫的。
為了模擬程式碼,它使用 LLVM、GCC、Clang 或 Python 來 JIT 中間表示。它可以模擬 shellcode 和全部或部分二進位檔案。可以執行 Python 回調來與執行進行交互,例如模擬庫函數效果。
doc 資料夾中提供了一些文件資源。
可以使用自動產生的文件:
瘴氣用途:
若要啟用程式碼 JIT,必須使用下列模組之一:
「可選」Miasm 也可使用:
若要使用抖動,建議使用 GCC 或 LLVM
pip install llvmlite
或從 llvmlite 安裝$ cd miasm_directory
$ python setup.py build
$ sudo python setup.py install
如果某個抖動模組編譯期間出現問題,Miasm 將跳過該錯誤並停用對應的模組(請參閱編譯輸出)。
大多數 Miasm 的 IDA 插件都使用 Miasm 功能的子集。讓它們工作的一個快速方法是添加:
pyparsing.py
到C:...IDApython
或pip install pyparsing
miasm/miasm
目錄到C:...IDApython
除 JITter 相關功能外的所有功能都將可用。如需更完整的安裝,請參閱上面的段落。
Miasm 附帶一組回歸測試。要運行所有這些:
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'
可以指定一些選項:
-m
-c
-t long
(不包括長測試)