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Longsusrunner.py
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# Simple attempt emulate suspicious functions in widewine (4.10.2209.0). Adjust to taste (starting point, logs, etc) and run while project is open.
#@author Satsuoni
#@category Deobfuscation
#@keybinding
#@menupath
#@toolbar
from binascii import hexlify
import logging
from ghidra.app.emulator import EmulatorHelper
#from ghidra.program.model.symbol import SymbolUtilities
from ghidra.util.task import ConsoleTaskMonitor
from ghidra.program.model.pcode import PcodeOp
from ghidra.program.model.symbol import *
from ghidra.program.model.pcode import JumpTable
from java.util import LinkedList, Arrays, ArrayList
from ghidra.app.cmd.function import CreateFunctionCmd
from ghidra.app.cmd.disassemble import DisassembleCommand
from ghidra.program.model.lang import Register
from ghidra.program.model.lang import OperandType
from ghidra.program.model.lang import RegisterManager
import array
import sys
logger = logging.getLogger("")
logger.setLevel(logging.DEBUG)
handler1=logging.StreamHandler(sys.stdout)
class WarnFormatter(logging.Formatter):
err_fmt = "ERROR: %(msg)s"
warn_fmt = "Warning: %(msg)s"
dbg_fmt = "DBG: %(module)s: %(lineno)d: %(msg)s"
info_fmt = "%(msg)s"
def __init__(self, fmt="%(levelno)s: %(msg)s"):
logging.Formatter.__init__(self, fmt)
def format(self, record):
# Save the original format configured by the user
# when the logger formatter was instantiated
format_orig = self._fmt
# Replace the original format with one customized by logging level
if record.levelno == logging.DEBUG:
self._fmt = WarnFormatter.dbg_fmt
elif record.levelno == logging.INFO:
self._fmt = WarnFormatter.info_fmt
elif record.levelno == logging.ERROR:
self._fmt = WarnFormatter.err_fmt
elif record.levelno == logging.WARNING:
self._fmt = WarnFormatter.warn_fmt
# Call the original formatter class to do the grunt work
result = logging.Formatter.format(self, record)
# Restore the original format configured by the user
self._fmt = format_orig
return result
formatter = WarnFormatter('%(message)s')
handler1.setFormatter(formatter)
handler2=logging.FileHandler("trunlog.log", mode='w', encoding="utf-8")
handler2.setFormatter(formatter)
logger.addHandler(handler1)
logger.addHandler(handler2)
def getAddress(offset):
return currentProgram.getAddressFactory().getDefaultAddressSpace().getAddress(offset)
def getProgramRegisterList(currentProgram):
pc = currentProgram.getProgramContext()
return pc.registers
def step(emu,monitor):
success = emu.step(monitor)
if (success == False):
lastError = emu.getLastError()
logger.error("Emulation Error: '{}'".format(lastError))
return success
def isCallInstruction(instr):
if instr is None:
return False
flowType = instr.getFlowType()
if flowType.isCall():
return True
return False
# 009bc60e heap alloc. No free available or necessary
class FakeMemory(object):
def __init__(self,startpoint):
self.start=startpoint
self.curpoint=self.start
def allocate(self,ln):
rpoint=self.curpoint
self.curpoint+=ln
return rpoint
mem=FakeMemory( 0x000000F02FFF0000)
def EmuRet(emu,offs=0):
pos=emu.readStackValue(0,8,False)
emu.writeRegister(emu.getPCRegister(), pos)
stack=emu.readRegister("RSP")
emu.writeRegister("RSP",stack+8+offs)
def OperatorNew(emu):
bytes=emu.readRegister("RCX")
ptr=mem.allocate(bytes)
logger.info("Allocating (new) {} bytes to {:x}".format(bytes,ptr))
emu.writeRegister("RAX",ptr)
EmuRet(emu)
def HeapAlloc(emu):
bytes=emu.readRegister("R8")
logger.info("Allocating {} bytes".format(bytes))
ptr=mem.allocate(bytes)
emu.writeRegister("RAX",ptr)
EmuRet(emu)
def MFree(emu):
bt2=emu.readRegister("R8")
logger.info("Freed something at {:x}".format(bt2))
emu.writeRegister("RAX",bt2)
EmuRet(emu)
def EnterCriticalSection(emu):
EmuRet(emu)
def TryAcquireSRWLockExclusive(emu):
emu.writeRegister("RAX",1)
EmuRet(emu)
tlsval=1
tlsstorage={}
def TlsAlloc(emu):
global tlsval
emu.writeRegister("RAX",tlsval)
tlsval+=1
EmuRet(emu)
def TlsSetValue(emu):
global tlsval,tlsstorage
index=emu.readRegister("RCX")
value=emu.readRegister("RDX")
tlsstorage[index]=value
emu.writeRegister("RAX",1)
EmuRet(emu)
def TlsGetValue(emu):
global tlsval,tlsstorage
index=emu.readRegister("RCX")
if index in tlsstorage:
emu.writeRegister("RAX",tlsstorage[index])
else:
emu.writeRegister("RAX",0)
EmuRet(emu)
def QueryPerformanceFrequency(emu):
offs=emu.readRegister("RCX")
emu.writeMemoryValue(getAddress(offs),8,1000)
emu.writeRegister("RAX",1)
EmuRet(emu)
def Ret0(emu):
emu.writeRegister("RAX",0)
EmuRet(emu)
def Ret1(emu):
emu.writeRegister("RAX",1)
EmuRet(emu)
def Ret1st(emu):
emu.writeRegister("RAX",emu.readRegister("RCX"))
EmuRet(emu)
time_cnt=0
def timeGetTime(emu):
global time_cnt
emu.writeRegister("RAX",time_cnt)
time_cnt+=1
EmuRet(emu)
last_error=-20
def LoadLibrary(emu):
global last_error
offs=emu.readRegister("RCX")
lname=emu.readMemory(getAddress(offs),200)
logger.info("Load library: {}".format(lname))
emu.writeRegister("RAX",0)
last_error=-21
EmuRet(emu)
def GetLastError(emu):
global last_error
emu.writeRegister("RAX",last_error)
EmuRet(emu)
def SetLastError(emu):
global last_error
last_error=emu.readRegister("RCX")
EmuRet(emu)
def getptd_noexit(emu):
global mem
tiddata=mem.allocate(256) # _tiddata
emu.writeRegister("RAX",tiddata)
EmuRet(emu)
def findwindowA(emu):
lpclass=emu.readRegister("RCX")
lpname=emu.readRegister("RDX")
logger.info(emu.readNullTerminatedString(getAddress(lpclass),200))
logger.info(emu.readNullTerminatedString(getAddress(lpname),200))
emu.writeRegister("RAX",0)
EmuRet(emu)
def InitThreadHeader(emu):
mm=emu.readRegister("RCX")
logger.info("Init Thread header?")
emu.writeMemoryValue(getAddress(mm),4,-1)
EmuRet(emu)
def InitThreadFooter(emu):
mm=emu.readRegister("RCX")
logger.info("Init Thread footer?")
emu.writeMemoryValue(getAddress(mm),4,-1)
EmuRet(emu)
def GetRandom(emu):
ptr=emu.readRegister("RCX")
len=emu.readRegister("RDX")
logger.info("Random... kinda")
for a in range(len):
emu.writeMemoryValue(getAddress(ptr),1,0xaf)
ptr+=1
emu.writeRegister("RAX",1)
EmuRet(emu)
dict={}
dict[getAddress(0x009bc60e )]=HeapAlloc
dict[getAddress(0x009bc1ec )]=EnterCriticalSection
dict[getAddress(0x009bc61a )]=MFree
dict[getAddress(0x009bcae2 )]=TlsAlloc
dict[getAddress(0x009bcb06 )]=TlsSetValue
dict[getAddress(0x009bcaf8 )]=TlsGetValue
dict[getAddress(0x009bcb14 )]=TryAcquireSRWLockExclusive
dict[getAddress(0x009bc8d6 )]=EnterCriticalSection #void
dict[getAddress(0x009bc874 )]=QueryPerformanceFrequency
dict[getAddress(0x009bccb6 )]=timeGetTime
dict[getAddress(0x009bc7f6 )]=LoadLibrary
dict[getAddress(0x009bc422 )]=GetLastError
dict[getAddress(0x18052d44c)]=EnterCriticalSection #FlsSetValue
dict[getAddress(0x009bc7ba )]=EnterCriticalSection #LeaveCriticalSection
dict[getAddress(0x009bcce8 )]=findwindowA
dict[getAddress(0x009bc4ae )]=Ret0 #GetModuleHandle
dict[getAddress(0x009bc4e4 )]=Ret0 #GetProcAddress
dict[getAddress(0x009bcc80 )]=GetRandom #SystemFunction036
dict[getAddress(0x009bc81c )]=EnterCriticalSection #OutputDebugString - void
dict[getAddress(0x009bc392 )]=Ret1 #GetCurrentThreadId
dict[getAddress(0x009bc100 )]=Ret0 #AcquireSRWLockExclusive
dict[getAddress(0x18052cc50)]=getptd_noexit
dict[getAddress(0x009bca2a )]=SetLastError
dict[getAddress(0x180256270)]=Ret0 #GetCurrentDir??
dict[getAddress(0x18050f1c0)]=OperatorNew
#dict[getAddress(0x180111f45)]=Ret1 #probably a table generator. Very slow, but nothing works after without it
dict[getAddress(0x18050f330)]=InitThreadHeader
dict[getAddress(0x18050f3c8)]=InitThreadFooter
dict[getAddress(0x180256d10)]=Ret1st
dict[getAddress(0x18050f580)]=EnterCriticalSection
def allocLargeStdstring(emu,len):
ptr=mem.allocate(24)
emu.writeMemoryValue(getAddress(ptr+8),8,len)
emu.writeMemoryValue(getAddress(ptr+16),8,len)
buf=mem.allocate(len)
emu.writeMemoryValue(getAddress(ptr),8,buf)
return ptr
def HostAllocate(emu):
bytes=emu.readRegister("RDX")
logger.info("HostAllocate: {} bytes".format(bytes))
ptr=mem.allocate(bytes)
emu.writeRegister("RAX",ptr)
EmuRet(emu)
dict[getAddress(0x0aa01)]=HostAllocate
def HostSetTimer(emu):
delay=emu.readRegister("RDX")
logger.info("HostSetTimer: {} msec".format(delay))
EmuRet(emu)
dict[getAddress(0x0aa02)]=HostSetTimer
def HostGetCurrentWallTime(emu):
logger.info("HostGetCurrentWallTime")
emu.writeRegister("XMM0",0)
EmuRet(emu)
dict[getAddress(0x0aa03)]=HostGetCurrentWallTime
def HostOnInitialized(emu):
success=emu.readRegister("EDX")
logger.info("OnInitialized : maybe?: {}".format(success))
EmuRet(emu)
dict[getAddress(0x0aa04)]=HostOnInitialized
def HostOnResolveKeyStatusPromise(emu):
prid=emu.readRegister("EDX")
logger.info("HostOnResolveKeyStatusPromise : {}".format(prid))
EmuRet(emu)
dict[getAddress(0x0aa05)]=HostOnResolveKeyStatusPromise
def HostOnResolveNewSessionPromise(emu):
prid=emu.readRegister("EDX")
sesid=emu.readRegister("R8")
logger.info("OnResolveNewSessionPromise : {} {}".format(prid,sesid))
EmuRet(emu)
dict[getAddress(0x0aa06)]=HostOnResolveNewSessionPromise
def HostOnResolvePromise(emu):
prid=emu.readRegister("EDX")
logger.info("HostOnResolvePromise : {}".format(prid))
EmuRet(emu)
dict[getAddress(0x0aa07)]=HostOnResolvePromise
def HostOnRejectPromise(emu):
prid=emu.readRegister("EDX")
ex=emu.readRegister("R8")
sc=emu.readRegister("R9")
logger.info("HostOnRejectPromise : {} Exc: {} sc: {}".format(prid,ex,sc ))
EmuRet(emu,8)
dict[getAddress(0x0aa08)]=HostOnRejectPromise
def HostOnSessionMessage(emu):
saveSnapshot(emu,"OnSessionMessage.gz")
messSize=emu.readStackValue(0x30,8,False)
print(messSize)
messPtr=emu.readStackValue(0x28,8,False)
mtype=emu.readRegister("R9")
logger.info("message_type")
logger.info(mtype)
mm=emu.readMemory(getAddress(messPtr),int(messSize))
logger.info("OnSessionMessage {} {} ".format( mtype, mm))
rmsg=""
for a in mm:
if a<0: a=256+a
rmsg+="{:02X}".format(a)
logger.info(rmsg)
raise 999
EmuRet(emu,8)
dict[getAddress(0x0aa09)]=HostOnSessionMessage
def HostOnSessionKeysChange(emu):
logger.info("HostOnSessionKeysChange")
EmuRet(emu,8)
dict[getAddress(0x0aa0a)]=HostOnSessionKeysChange
def HostOnExpirationChange(emu):
logger.info("HostOnExpirationChange")
EmuRet(emu)
dict[getAddress(0x0aa0b)]=HostOnExpirationChange
def HostOnSessionClosed(emu):
logger.info("HostOnSessionClosed")
EmuRet(emu)
dict[getAddress(0x0aa0c)]=HostOnExpirationChange
def HostSendPlatformChallenge(emu):
logger.info("HostSendPlatformChallenge")
EmuRet(emu)
dict[getAddress(0x0aa0d)]=HostSendPlatformChallenge
def HostEnableOutputProtection(emu):
logger.info("HostEnableOutputProtection")
EmuRet(emu)
dict[getAddress(0x0aa0e)]=HostEnableOutputProtection
def HostQueryOutputProtectionStatus(emu):
logger.info("HostQueryOutputProtectionStatus")
EmuRet(emu)
dict[getAddress(0x0aa0f)]=HostQueryOutputProtectionStatus
def HostOnDeferredInitializationDone(emu):
logger.info("HostOnDeferredInitializationDone")
EmuRet(emu)
dict[getAddress(0x0aa10)]=HostOnDeferredInitializationDone
def HostCreateFileIO(emu):
logger.info("HostCreateFileIO")
emu.writeRegister("RAX",0)
EmuRet(emu)
dict[getAddress(0x0aa11)]=HostCreateFileIO
def HostRequestStorageId(emu):
logger.info("HostRequestStorageId")
EmuRet(emu)
dict[getAddress(0x0aa12)]=HostRequestStorageId
# create Host structure+vtable
def allocHost(emu):
vt_ptr=mem.allocate(8*16)
ptr=vt_ptr
emu.writeMemoryValue(getAddress(ptr),8,0x0aa01)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa02)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa03)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa04)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa05)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa06)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa07)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa08)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa09)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0a)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0b)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0c)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0d)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0e)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa0f)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa10)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa11)
ptr+=8
emu.writeMemoryValue(getAddress(ptr),8,0x0aa12)
cls=mem.allocate(8)
emu.writeMemoryValue(getAddress(cls),8,vt_ptr)
return cls
def makeHost(emu):
logger.info("Getting host")
ptr=allocHost(emu)
emu.writeRegister("RAX",ptr)
EmuRet(emu)
def isCallOther(instr):
if instr is None:
return False
raw_pcode = instr.getPcode()
for code in raw_pcode:
if code.getOpcode()==PcodeOp.CALLOTHER:
return True
return False
def getCallOtherName(instr):
if instr is None:
return None
raw_pcode = instr.getPcode()
for code in raw_pcode:
if code.getOpcode()==PcodeOp.CALLOTHER:
return currentProgram.getLanguage().getUserDefinedOpName(code.getInput(0).getOffset())
return None
def skip(emu):
executionAddress = emu.getExecutionAddress()
instr=getInstructionAt(executionAddress)
nextInstr=instr.getNext()
lval = int("0x{}".format(nextInstr.getAddress()), 16)
emu.writeRegister(emu.getPCRegister(), lval)
dict[getAddress(0xf0000)]=makeHost
initCdm=getAddress(0x180001040)
monitor=ConsoleTaskMonitor()
rspStart=0x000000002FFF0000
emu=EmulatorHelper(currentProgram)
startaddr=initCdm#getAddress(0x18017e3b0)
cur_fun=getFunctionContaining(startaddr)
mainFunctionEntryLong = int("0x{}".format(cur_fun.getEntryPoint()), 16)
emu.writeRegister(emu.getPCRegister(), mainFunctionEntryLong)
emu.writeRegister("RSP", rspStart)
emu.writeRegister("RBP", 0x000000002FFF0000)
datstring=allocLargeStdstring(emu,256)
emu.writeRegister("RDX",datstring)
#clearkeys = "org.w3.clearkey"
import struct
def readULL(emu,addr):
dat=emu.readMemory(addr,8)
cdv=struct.unpack("<Q",dat)[0]
return cdv
def get_cptr(emu,string):
ptr=mem.allocate(len(string)+1)
emu.writeMemory(getAddress(ptr),string.encode("utf-8"))
emu.writeMemory(getAddress(ptr+len(string)),b'\0')
return ptr
def listToMem(emu,lst):
ptr=mem.allocate(len(lst)+1)
emu.writeMemory(getAddress(ptr),array.array('B',lst).tostring())
emu.writeMemory(getAddress(ptr+len(lst)),b'\0')
logger.info("Written memory is: {}".format(emu.readMemory(getAddress(ptr),len(lst))))
logger.info("Lst is is: {}".format(array.array('B',lst)))
return ptr
def EmuPush(emu,val):
stack=emu.readRegister("RSP")
stack=stack-8
emu.writeRegister("RSP",stack)
emu.writeMemoryValue(getAddress(stack), 8,val)
def EmuPull(emu,offs):
stack=emu.readRegister("RSP")
stack=stack+offs
emu.writeRegister("RSP",stack)
# +x30 +x20
def EmuPush4(emu,val):
stack=emu.readRegister("RSP")
stack=stack-4
emu.writeRegister("RSP",stack)
emu.writeMemoryValue(getAddress(stack), 4,val)
def isReturn(instr):
if instr is None:
return False
raw_pcode = instr.getPcode()
for code in raw_pcode:
if code.getOpcode()==PcodeOp.RETURN:
return True
return False
#fill process information blocks with varying garbage
emu.writeRegister("GS_OFFSET",0x3f000)
threadinfo=mem.allocate(1024)
pptr=threadinfo
#fill with the same struct 128 times
threaddata=mem.allocate(1024)
for a in range(128):
emu.writeMemoryValue(getAddress(pptr),8,threaddata)
pptr+=8
for a in range(1024):
emu.writeMemoryValue(getAddress(threaddata+a),1,0xff)
emu.writeMemoryValue(getAddress(0x3f058),8,threadinfo)
logger.info("GS: {:x}".format(emu.readRegister("GS_OFFSET")))
trace=False
class Operand(object):
def getVal(self,emu):
if self.type=="const":
return self.value
elif self.type=="register":
return emu.readRegister(self.value)
elif self.type=="stackvar":
return emu.readStackValue(int(self.value,0),self.length,False)
elif self.type=="memconst":
return 0 #need implementation?
def __hash__(self):
return hash((self.type, self.value))
def __eq__(self, other):
return (self.type, self.value) == (other.type, other.value)
def __ne__(self, other):
return not(self == other)
def __init__(self,instr,num):
self.type="unknown"
if instr is None:
return
if num>=instr.getNumOperands():
return
tp=instr.getOperandType(num)
objlist=instr.getOpObjects(num)
ln=len(objlist)
if ln==0:
return
if tp&OperandType.SCALAR: #const
self.type="const"
self.value=int(str(objlist[0]),16)
return
if tp&OperandType.REGISTER and len(objlist)==1: #pure register
self.type="register"
self.value=str(objlist[0])
return
if len(objlist)==2 and str(objlist[0])=="RSP":
self.type="stackvar"
self.value="0x{:x}".format(int(str(objlist[1]),0))
self.offset=int(str(objlist[1]),0)
self.len=1
oprep=instr.getDefaultOperandRepresentation(num)
if "xword" in oprep:
self.length=16
elif "qword" in oprep:
self.length=8
elif "dword" in oprep:
self.length=4
elif "word ptr" in oprep:
self.length=2
elif "byte ptr" in oprep:
self.length=1
return
if len(objlist)==2 and tp&OperandType.DYNAMIC and tp&OperandType.ADDRESS : #dword ptr [RCX + -0x4]
self.type="memconst"
self.value=str(objlist[1])
self.olist=objlist
return
if len(objlist)==2 and str(objlist[0])=="GS":
self.type="debugho"
self.value="__0x{:x}".format(int(str(objlist[1]),0))
return
if len(objlist)==3 and isinstance(objlist[0],Register): #not quite correct, but. uff
self.type="register"
self.value=str(objlist[0])
return
logger.warning("{} {:x} {} needs operand implementation {}".format(instr,tp,num,objlist))
#not sure why only these are missing.
def pshuflw(emu,instr):
if instr is None: return
if instr.getNumOperands()!=3: return
reg_into=Operand(instr,0)
reg_from=Operand(instr,1)
shuf=Operand(instr,2)
if reg_into.type!="register" or reg_from.type!="register" or shuf.type!="const" :
raise 33
fr=emu.readRegister(reg_from.value)
imm=shuf.value
to=(fr&0xffffffffffffffff0000000000000000)
to+=(fr>> (imm&4)*16 )&0xffff
to+=((fr>> ( (imm>>2) & 4)*16 )&0xffff)<<16
to+=((fr>> ( (imm>>4) & 4)*16 )&0xffff)<<32
to+=((fr>> ( (imm>>8) & 4)*16 )&0xffff)<<48
emu.writeRegister(reg_into.value,to)
skip(emu)
def pmovmskb(emu,instr):
if instr is None: return
if instr.getNumOperands()!=2: return
reg_into=Operand(instr,0)
reg_from=Operand(instr,1)
if reg_into.type!="register" or reg_from.type!="register":
raise 34
fr=emu.readRegister(reg_from.value)
cnt=1
val=0
for bt in range(16):
idir=int((fr&(1<<(8*cnt-1)))!=0)
val |= (idir<<bt)
cnt+=1
emu.writeRegister(reg_into.value,val)
skip(emu)
def dumpParameters(emu,num):
pars=[emu.readRegister("RCX"),emu.readRegister("RDX"),emu.readRegister("R8"),emu.readRegister("R9")]
if num>4:
co=0x28
esp=emu.readRegister("ESP")
for a in range(num-4):
pars.append(readULL(emu,getAddress(esp+co)))
co+=8
for a in range (num):
logger.info("Param_{}: {:x}".format(a+1,pars[a]))
def writeRegister(emu,reg,fl):
nm=reg.getName()
ln=reg.getMinimumByteSize()
if ln >8:
ln=16
elif ln>4:
ln=8
elif ln >2:
ln=4
else:
ln=2
fl.write(struct.pack("<H", len(nm)))
fl.write(nm.encode("ascii"))
fl.write(struct.pack("<H", ln))
val=emu.readRegister(nm)
if ln==16:
fl.write(struct.pack("<Q", (val>>64)&0xffffffffffffffff ))
fl.write(struct.pack("<Q", val&0xffffffffffffffff))
elif ln==8:
fl.write(struct.pack("<Q", val&0xffffffffffffffff))
elif ln==4:
fl.write(struct.pack("<I", val&0xffffffff))
else:
fl.write(struct.pack("<H", val&0xffff))
def writeMemoryChunk(emu,start,ln,fl):
fl.write(struct.pack("<Q",start))
fl.write(struct.pack("<Q",ln))
if ln>0:
mbuf=emu.readMemory(getAddress(start),ln)
fl.write(mbuf)
def writeSnapshot(emu,fl):
global mem, rspStart, currentProgram
excl=set(["contextreg"])
br=set([e.getBaseRegister() for e in getProgramRegisterList(currentProgram) if e.getBaseRegister().getName() not in excl])
rsp=emu.readRegister("RSP")
fl.write(struct.pack("<I",len(br)))
for reg in br:
writeRegister(emu,reg,fl)
writeMemoryChunk(emu,mem.start,mem.curpoint-mem.start,fl)
if rsp<=rspStart:
writeMemoryChunk(emu,rsp,rspStart-rsp+8,fl)
for blk in currentProgram.getMemory().getBlocks():
writeMemoryChunk(emu,blk.getStart().getOffset(),blk.getSize(),fl)
def readRegister(emu,fl):
dt=fl.read(2)
if len(dt)<2: return False
nmlen=struct.unpack("<H",dt)[0]
nml=fl.read(nmlen)
if len(nml)<nmlen: return False
nm=nml.decode("ascii")
dt=fl.read(2)
if len(dt)<2: return False
ln=struct.unpack("<H",dt)[0]
if ln==16:
dt=fl.read(16)
if len(dt)<16: return False
vals=struct.unpack("<QQ",dt)
val=(vals[0]<<64)+vals[1]
elif ln==8:
dt=fl.read(8)
if len(dt)<8: return False
val=struct.unpack("<Q",dt)[0]
elif ln==4:
dt=fl.read(4)
if len(dt)<4: return False
val=struct.unpack("<I",dt)[0]
else:
dt=fl.read(2)
if len(dt)<2: return False
val=struct.unpack("<H",dt)[0]
if nm!= "contextreg":
emu.writeRegister(nm,val)
return True
def readMemoryChunk(emu,fl,setmem=False):
#start,ln,
global mem
dt=fl.read(8)
if len(dt)<8: return False
start=struct.unpack("<Q",dt)[0]
dt=fl.read(8)
if len(dt)<8: return False
ln=struct.unpack("<Q",dt)[0]
if ln>0:
dat=fl.read(ln)
if len(dat)<ln: return False
emu.writeMemory(getAddress(start),dat)
if setmem:
mem.start=start
mem.curpoint=start+ln
return True
def readSnapshot(emu,fl):
global mem, rspStart
numreg=struct.unpack("<I",fl.read(4))[0]
for i in range(numreg):
if not readRegister(emu,fl):
logger.warning("Corrupt snapshot: not enough registers")
return
mset=True
while readMemoryChunk(emu,fl,mset):
mset=False
import gzip
import os
basedir="./"
def saveSnapshot(emu,name):
global basedir
fname=os.path.join(basedir,name)
with gzip.open(fname, 'wb',compresslevel=8) as f:
writeSnapshot(emu,f)
def loadSnapshot(emu,name):
global basedir
fname=os.path.join(basedir,name)
with gzip.open(fname, 'rb') as f:
readSnapshot(emu,f)
class Permutator(object): #for 256-byte objects...
def __init__(self, grabAddr,tableReg,ptrReg,name=None,cntd=31):
self.grabAddr=grabAddr
self.table=None
self.tableReg=tableReg
self.ptrReg=ptrReg
self.countdown=0
self.name=name
self.cntd=cntd
def grab(self, emu,addr):
if addr==self.grabAddr:
if self.table is None:
print("Getting table from {}".format(self.tableReg))
if isinstance(self.tableReg, (int,long)):
rg=self.tableReg
else:
rg=emu.readRegister(self.tableReg)
self.table=[]
for a in range(32):
self.table.append(emu.readMemoryByte(getAddress(rg+a)))
if self.countdown>0:
self.countdown-=1
else:
#print("Grabbing at {}".format(addr))
if isinstance(self.ptrReg,list):
if len(self.ptrReg)==2:
dataAddr=emu.readRegister(self.ptrReg[0])+self.ptrReg[1]
else:
indirAddr=emu.readRegister(self.ptrReg[0])+self.ptrReg[1]
dataAddr=readULL(emu,getAddress(indirAddr))
elif isinstance(self.ptrReg,(int,long)):
dataAddr=self.ptrReg
else:
dataAddr=emu.readRegister(self.ptrReg)
val=0
for a in range(32):
dlt=readULL(emu,getAddress(dataAddr+8*self.table[a]))
val=val+dlt*(1<<(64*a))
self.countdown=self.cntd
if self.name is None:
logger.info("Grabbed at {}: {:x}".format(self.grabAddr,val))
else:
logger.info("Grabbed {} at {}: {:x}".format(self.name,self.grabAddr,val))
class BCollector(object):
def __init__(self,name,startAddr,collectAddr,collectA,collectB,endAddr,paraCol=False):
self.name=name
self.startAddr=getAddress(startAddr)
self.endAddr=getAddress(endAddr)
self.collectAddr=getAddress(collectAddr)
self.isCollecting=False
self.collectA=collectA
self.a=0
self.collectB=collectB
self.b=0
self.cnt=0
self.cntb=0
self.paracol=paraCol
def emget(self,emu, coll):
lc=len(coll)
if lc ==1:
if isinstance(coll[0],int):
return readULL(emu,getAddress(coll[0]))
else:
return emu.readRegister(coll[0])
elif lc==2: #[reg+const]
addr=emu.readRegister(coll[0])+coll[1]
return readULL(emu,getAddress(addr))
elif lc==3: #[reg+reg*const]
addr=emu.readRegister(coll[0])+emu.readRegister(coll[1])*coll[2]
#logger.info("Cll: {:x} {:x} {:x}".format(emu.readRegister(coll[0]),emu.readRegister(coll[1]),addr))
return readULL(emu,getAddress(addr))
elif lc==4: #[reg+reg*const+c2]
addr=emu.readRegister(coll[0])+emu.readRegister(coll[1])*coll[2]+coll[3]
return readULL(emu,getAddress(addr))
elif lc==5: # ["RSP",40,"RAX",8,"indir"]
addr=emu.readRegister(coll[0])+coll[1]
addr2=readULL(emu,getAddress(addr))+emu.readRegister(coll[2])*coll[3]
return readULL(emu,getAddress(addr2))
def collect(self,emu,addr):
if addr==self.startAddr:
self.a=0
self.b=0
self.cntb=0
self.cnt=0
self.isCollecting=True
elif addr==self.endAddr:
logger.info("Collected as {} ,a : {:x}".format(self.name,self.a))
logger.info("Collected as {} ,b : {:x}".format(self.name,self.b))
logger.info("Collection rounds as {} , {}".format(self.name,self.cnt))
self.a=0
self.b=0
self.cnt=0
self.isCollecting=False
elif addr==self.collectAddr and self.isCollecting:
da=self.emget(emu,self.collectA)
if not self.paracol:
db=self.emget(emu,self.collectB)
ml=(1<<(64*self.cnt))
self.a+=ml*da
if not self.paracol:
self.b+=ml*db
self.cnt+=1
elif self.isCollecting and self.paracol and self.cntb<32 and addr>self.startAddr and addr<self.endAddr:
instr=getInstructionAt(addr)
if instr.getMnemonicString()=="MUL":
db=self.emget(emu,self.collectB)
ml=(1<<(64*self.cntb))
self.b+=ml*db
self.cntb+=1
snc=528
def dumpBuffer(emu,offs_addr,ln):
dl=emu.readMemory(getAddress(offs_addr),ln)
dst=""
for a in dl:
if a<0: a+=256
dst+="{:02X}".format(a)
logger.info("{}".format(dst))
def runModule(start,lSnapshot=None):
global trace, basedir, snc
cur_fun=getFunctionContaining(start)
mainFunctionEntryLong = int("0x{}".format(cur_fun.getEntryPoint()), 16)
emu.writeRegister(emu.getPCRegister(), mainFunctionEntryLong)
#for nl in range(nnl):
subN=False
nnn=0
fff=0
ncnt=0
cnt=0
#stack=emu.readRegister("RSP")
fname=None
if lSnapshot is not None:
if os.path.isfile(lSnapshot):
fname=lSnapshot
elif os.path.isfile(os.path.join(basedir,lSnapshot)):
fname=os.path.join(basedir,lSnapshot)
else:
logger.warning("{} is not correct file name".format(lSnapshot))
if fname is None:
EmuPush(emu,0xfafadeadbeef)
else:
loadSnapshot(emu,fname)
snapcnt=0
#precoll= BCollector("MbSubtr",0x18017b07c,0x18017b0eb,["R14"],["RCX","RAX",8],0x18017b13f)
#ncoll=BCollector("SubN",0x18017b140,0x18017b1e5,["RDI"],["RAX"],0x18017b24b)
#vcoll=BCollector("VC",0x18016dc81,0x18016dcb5,["RCX"],["RCX"],0x18016dcdb)
#pcoll=BCollector("Plus",0x18017b367,0x18017b397,["R14","RAX",8],["R15","RAX",8],0x18017b3ff)
#ucoll=BCollector("Upper",0x18017c4d2,0x18017c52a,["RAX"],["R12","RCX",8],0x18017d326,False)
#yacoll=BCollector("YetAnother",0x18017b513,0x18017b578,["RAX"],["R14","RCX",8],0x18017c2f5,False)
#hm1coll=BCollector("HasMulAdd",0x18016dd26,0x18016dd87,["RAX"],["R13","RCX",8],0x18016ebb4,False)
#hm2coll=BCollector("HasMulAdd2",0x18016ec3f,0x18016eca5,["RAX"],["R12","RCX",8],0x18016fab9,False)
#mnscoll=BCollector("Subtractor",0x18017d4ac,0x18017d54a,["R12"],["RAX"],0x18017d598)
# add permutators to track Bignum manipulation. Each one slows down execution, so use with care?
prms=[Permutator(getAddress(0x18017c373),"RSI","R14"),
Permutator(getAddress(0x18017c505),"RBX","R12"),
Permutator(getAddress(0x18017b0c7),"RDI","R15"),
#MaybeImportantSubtraction
Permutator(getAddress(0x18017b0eb),0x180bb7258,"R15","SubtractionA"), #maybesubtraction
Permutator(getAddress(0x18017b0eb),0x180bb7258,["RSP", 32,"rd"],"SubtractionB"), #maybesubtraction
#SubN - moved to next function that actually finalized modN operation, it seems.
Permutator(getAddress(0x18017b33d),0x180bb7258,["RSP", 32,"rd"],"ModN",0),
#VC - maybe first op?
Permutator(getAddress(0x18016dce0),0x180bb7258,["RSP", 0xae20],"VC"), #VC
#LooksSum: only args?
Permutator(getAddress(0x18017b367),0x180bb7258,"R15","SumA",0),#sum?
Permutator(getAddress(0x18017b367),0x180bb7258,"R14","SumB",0),#sum?
#Plum - only result
Permutator(getAddress(0x18017b4ba),0x180bb7258,"R13","PostSum",0),#dealing with overflow?
#"Upper" multiply. Looks like square, honestly
Permutator(getAddress(0x18017d313),0x180bb7258,["RSP", 48,"rd"],"Upper",0),
#YetAnother: get args:
Permutator(getAddress(0x18017b513),0x180bb7258,["RSP", 0x60,"rd"],"MulA",0),#mul?
Permutator(getAddress(0x18017b513),0x180bb7258,["RSP", 56,"rd"],"MulB",0),#mul?
#Main(?) func has several multiplies separate
Permutator(getAddress(0x18016dd26),0x180bb7258,["RSP", 0xab20],"Main1A",0),
Permutator(getAddress(0x18016dd26),0x180bb7258,0x180650ef0,"Main1B",0),
Permutator(getAddress(0x18016ec3f),0x180bb7258,["RSP", 0xaa20],"Main2A",0),
Permutator(getAddress(0x18016ec3f),0x180bb7258,0x180651450,"Main2B",0),
#CopyLnum
Permutator(getAddress(0x18017c39f),0x180bb7258,"R15","Copy",0),
# Second func (decrypt?)
Permutator(getAddress(0x180148eea),0x180bb70d4,"R15","S_SubtractionA"), #maybesubtraction
Permutator(getAddress(0x180148eea),0x180bb70d4,["RSP", 32,"rd"],"S_SubtractionB"), #maybesubtraction
#main
Permutator(getAddress(0x180144477),0x180bb70d4,["RSP", 0xb000],"S_Main1A",0),
Permutator(getAddress(0x180144477),0x180bb70d4,0x18064e750,"S_Main1B",0),
#nmodulo
Permutator(getAddress(0x1801491ab),0x180bb70d4,["RSP", 32,"rd"],"S_ModN",0),
#sum
Permutator(getAddress(0x1801491e5),0x180bb70d4,"R15","S_SumA",0),#sum?
Permutator(getAddress(0x1801491e5),0x180bb70d4,"R14","S_SumB",0),#sum?
#sumres
Permutator(getAddress(0x180149328),0x180bb70d4,"R13","PostSum",0),#dealing with overflow?
Permutator(getAddress(0x18017d50a),"RSI","RCX"),
#Permutator(getAddress(0x18017d535),"RDI","RCX"), is xored??
#AdcUser??
Permutator(getAddress(0x18014b378),"RSI","RCX"),
#SumAdc??
Permutator(getAddress(0x180149205),"RDI","R15"),
Permutator(getAddress(0x180149228),"RDI","R14"),
#Another minusN?
Permutator(getAddress(0x180149013),"RBX","RCX"),
#Mul is suspect
Permutator(getAddress(0x1801444a6),"R13",["RSP", 0xb000]),
]
#prms=[]
coutp=None
cclen=None
#very detailed trace, good for spotting small discrepancies but slow and verbose
superTrace=False
while True:
executionAddress = emu.getExecutionAddress()
if executionAddress==getAddress(0xfafadeadbeef):
logger.info("Probably return ")
break
if executionAddress==getAddress(0x18016dc81):
rsp=emu.readRegister("RSP")+0xb120
logger.info("Preload")
dumpBuffer(emu,rsp,0x402)
if executionAddress==getAddress(0x18016d323):
rsi=emu.readRegister("RSI")