unfuck
1.0.0
操过 Python 2.7 字节码吗?让我们把它unfuck
。
unfuck 是一个用于反混淆 Python 2.7 字节码的实用程序和库。它本质上是带有污点跟踪的 Python VM 的重新实现。一些unfuck可以做的事情:
#1 和 #2 是 Python 反编译器在尝试重建原始 Python 源代码时遇到的两个最大的问题。
unfuck 基本上使你的字节码从这个变成这个:
或者从这个到这个:
是的,这些都是现实世界的例子。
unfuck 可以用作库或命令行实用程序。
unfuck 0.2.0
USAGE:
unfuck [FLAGS] [OPTIONS] <input-obfuscated-file> <output-path> [graphs-dir] [SUBCOMMAND]
FLAGS:
--dry Dry run only -- do not write any files
-g Enable outputting code graphs to dot format
-h, --help Prints help information
-q Disable all logging
-V, --version Prints version information
-v Enable verbose logging
OPTIONS:
--decompiler <decompiler> Your favorite Python 2.7 bytecode decompiler. This program assumes the decompiler's
first positional argument is the file to decompile, and it prints the decompiled
output to stdout [env: UNFUCK_DECOMPILER=] [default: uncompyle6]
ARGS:
<input-obfuscated-file> Input obfuscated file
<output-path> Output file name or directory name. If this path is a directory, a file will be
created with the same name as the input. When the `strings-only` subcommand is
applied, this will be where the output strings file is placed
<graphs-dir> An optional directory for graphs to be written to [default: .]
SUBCOMMANDS:
help Prints this message or the help of the given subcommand(s)
strings-only
要取消单个文件:
# deobfuscated.pyc can also be a directory
unfuck obfuscated.pyc deobfuscated.pyc
您还可以提供其他标志以将字符串转储到文件,或转储可以在 graphviz 中查看的dot
图:
# -g is for printing graphs
unfuck -g obfuscated.pyc deobfuscated.pyc
# use the strings-only subcommand for dumping just dumping strings -- no deobfuscation is performed
unfuck deobfuscated.pyc ./strings.csv strings-only
unfuck 需要系统PATH
中包含 Python 2.7 。确保它存在后,您应该能够进行cargo build
。如果由于某种原因无法找到正确的解释器,请尝试将PYTHON_SYS_EXECUTABLE
环境变量设置为 Python 2.7 解释器路径。
cargo install --force unfuck
注意: unfuck 最初设计时并没有考虑到库的使用,因此带来了自己的多线程平台(在本例中为 Rayon)。
用法相当简单:
use std :: convert :: TryInto ;
use std :: fs :: File ;
let mut pyc_contents = vec ! [ ] ;
let pyc_file = File :: open ( "obfuscated.pyc" ) ? ;
pyc_file . read_to_end ( & mut pyc_contents ) ? ;
// magic/moddate are specific to the PYC header and are required to be
// a valid PYC file
let magic = u32 :: from_le_bytes ( pyc_contents [ 0 .. 4 ] . try_into ( ) . unwrap ( ) ) ;
let moddate = u32 :: from_le_bytes ( pyc_contents [ 4 .. 8 ] . try_into ( ) . unwrap ( ) ) ;
let pyc_contents = & pyc_contents [ 8 .. ] ;
// Use a standard Python 2.7 opcode table
let deobfuscator = unfuck :: Deobfuscator :: < pydis :: opcode :: py27 :: Standard > :: new ( pyc_contents ) ;
let deobfuscator = if enable_graphs {
deobfuscator . enable_graphs ( )
} else {
deobfuscator
} ;
let deobfuscated_code = deobfuscator . deobfuscate ( ) ? ;
let mut deobfuscated_file = File :: create ( "deobfuscated.pyc" ) ? ;
deobfuscated_file . write_all ( & magic . to_le_bytes ( ) [ .. ] ) ? ;
deobfuscated_file . write_all ( & moddate . to_le_bytes ( ) [ .. ] ) ? ;
deobfuscated_file . write_all ( deobfuscated_code . data . as_slice ( ) ) ? ;
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