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- Help
- `!mona help assemble`
- manual : https://www.corelan.be/index.php/2011/07/14/mona-py-the-manual/
- Update Mona
- `!mona update`
- Switch between stable and trunk release:
- `!mona update -t release`
- `!mona update -t trunk`
- Configure working folder
- `!mona config -set workingfolder c:\mona%p`
- Global options
- `-o` - ignore OS module from search operations.
- `-m` - specify the modules to perform the search operation on (ex: -m "gtk*,*win*,shell32.dll")
- `-m *` searches all modules
- `-cm` - set criteria (c) a module (m) should comply with to get included in search operations.
- Available:
- aslr
- rebase
- safeseh
- nx
- os
- Example of including aslr and rebase modules, but excluding safeseh modules:
- `-cm aslr=true,rebase=true,safeseh=false`
- `-cp` - specify what criteria (c) a pointer (p) should match.
- Available:
- unicode (also includes unicode transforms)
- ascii
- asciiprint
- upper
- lower
- uppernum
- lowernum
- numeric
- alphanum
- nonull
- startswithnull
- Example : only show pointers that contain ascii printable bytes
- `-cp asciiprint`
- Example : only show pointers that dont contain null bytes
- `-cp nonull`
- `-cpb` - specify bad characters for pointers, so pointers containing them are skipped
- Example with null byte, carriage return, and line feet:
- `-cpb '\x00\x0a\x0d'`
- Analyze crash
- `!mona findmsp`
- Locate EIP - pattern_create / pattern_offset :
- `!mona pattern_create 5000`
- `!mona pattern_offset <EIP_VALUE>`
- Get value on stack (ascii):
- `!mona pattern_offset 5Ai6`
- Find bad characters:
- 1 - generate array of all possible characters:
- `!mona bytearray -cpb "\x00"`
- 2 - Put array of all hex chars into overflow
- 3 - run the program until EIP gets overwritten. Then enter the following (0012FD6C is the address of first byte of the badchars array):
- `!mona compare -f C:\mona\<app>\bytearray.bin -a 0012FD6C`
- 4 - mona gives 1 or multiple badchars. Remove these badchars from array.
- 5 - repeat above until all bad chars are removed
- Example:
- `!mona bytearray -cpb "\x00\x09"`
- `!mona compare -f C:\mona\<app>\bytearray.bin -a 0012FD6C`
- `!mona bytearray -cpb "\x00\x09\x0a"`
- `!mona compare -f C:\mona\<app>\bytearray.bin -a 0012FD6C`
- `!mona bytearray -cpb "\x00\x09\x0a\x0d"`
- `!mona compare -f C:\mona\<app>\bytearray.bin -a 0012FD6C`
- SEH
- Find SEH offset (nseh / seh + jump code):
- 1 - Replace A's by unique pattern (pattern_create)
- 2 - `!mona sehchain`
- Find pop pop ret (for SEH Bypass):
- `!mona seh`
- Note: this will create seh.txt in working folder
- Egg Hunter:
- Find eggs occurrences in memory:
- `!mona find -s "W00TW00T"`
- Generate egghunter:
- mona can create an egghunter with checksum check :
- -t : tag (ex: w00t). Default value is w00t
- -c : enable checksum routine. Only works in conjunction with parameter -f
- -f : file containing the shellcode
- Example:
- `!mona egg -t W00T`
- `!mona egg -t W00T -c -f shellcode.bin`
- Find jump or call or push/ret to a register:
- `!mona jmp -r edi`
- Note: this creates jmp.txt in working folder.
- Find arbitrary instructions in dll:
- `/usr/share/metasploit-framework/tools/exploit/nasm_shell.rb`
- `jmp esp ==> FF E4`
- `!mona modules`
- `!mona find -s "\xff\xe4" -m <module>`
- Find shellcode occurrences in memory (and integrity check):
- 1 - Create raw shellcode.bin file using Python or anything you'd like
- 2 - Search memory for the shellcode with mona:
- `!mona compare -f C:\Users\administrator\Desktop\WORK\tmp\shellcode.bin`
- Asm instructions to opcodes:
- `!mona assemble -s "xor eax,eax # pop EBX # ret"`
- Set breakpoint on addr when the program read or write it:
- Mandatory arguments:
- -a
- -t : where is either “READ” or “WRITE”
- Note : the address should exist when setting the breakpoint. If not, youll get an error.
- Example : set a breakpoint when the application reads from 0012C431:
- `!mona bp -a 0x0012C431 -t READ`
- Generate msfmodule based on crash:
- 1 - Replace A's by unique pattern (pattern_create)
- 2 - When crash occurs:
- `!mona suggest`