lscan is a library identification tool on statically linked/stripped binaries
Branch: master
Clone or download
Type Name Latest commit message Commit time
Failed to load latest commit information.
amd64 poc Nov 29, 2016
arm signature generation script fix Jun 26, 2016
i386 poc Nov 29, 2016
mips experiments Jun 26, 2016
src exp data for amd64 arch Jun 25, 2016 Update Jun 2, 2018 Update Jun 2, 2018
stripped poc Nov 29, 2016


lscan is a tool which identifies library in statically linked/stripped binaries. The tool is useful for the reverse engineering and computer forensics. It helps recognizing common functions in compiled binaries and determining libraries they are using. lscan uses FLIRT (Fast Library Identification and Recognition Technology) signatures to perform library identification.


If you want to use lscan, you have to install pyelftools and pefile first.

After pyelftools and pefile are installed, lscan can be used as a standalone tool

$python [-h] [-f BINFILE] [-s SIGFILE] [-S SIGDIR] [-v]




-h, --help show this help message and exit
-v, --versbose Verbose mode
Signature file -S SIGDIR, --sigs=SIGDIR
Signature folder -f BINFILE, --file=BINFILE
ELF file


$python -S i386/sig -f i386/bin/bin-libc-2.23

$python -s i386/sig/libpthread-2.23.sig -f i386/bin/bin-libpthread-2.23 -v

$python -f i386/win32/bin/bin-libcmt.exe -s i386/win32/sig/msvcmrt.sig


Reverse Engineer a stripped binary with lscan and IDApro.

A community driven collection of IDA FLIRT signature

Updating sig database

To generate sig files and add them to lscan fig database you need Hex-Rays flair toolkit.

Generate the pat file

$./pelf /usr/lib/libc.a libc.pat

Generate the sig file from the pat file

$./sigmake libc.pat libc.sig

Optionally Use -n parameter to specify the library name.

Collisions may occurs while generating the sig file. In this case a libc.exc file will be created. To resolve the conflicts you must edit the .exc and add '+' at the start of the line to keep a module or '-' if you are not sure about the selection. Do nothing if you want to exclue all the modules. After resolving the conflicts run the above command again. Finnaly copy the libc.sig file to lscan's sig folder.

For coff lib format use pcf instead of pelf

$./pcf libcmt.lib libcmt.pat


Version 0.6 (2017-01-19)

  • Add support for FLIRT signatures >= v10

Version 0.5 (2016-06-26)

  • Added support to PE binaries

Version 0.4 (2016-06-19)

  • Bug fix: handling tail bytes, type mismatch in comparison
  • Bug fix: Regex, search method replaced by finditer method to iterate through all node pattern matches
  • Bug fix: handling tail bytes, iterate through all functions in module having tail bytes
  • Handling modules with crc length = 0 and crc = 0 espacially for small functions

Version 0.3 (2016-03-28)

  • Support for stripped binary
  • Introduced deep match mode
  • Better ELF parsing (function offsets)

Version 0.2 (2016-03-23)

  • Added support for compressed signtaure files
  • Added support to FLIRT functions offset
  • Load multiple signature files
  • More information output (function offset+names)
  • Updated the command line layout and help messages

Version 0.1(2016-03-20)

  • First release