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bcc's Introduction

Building

  • Install Nix or NixOS
  • Clone my supplementary packages repo
  • Clone nixpkgs if you have not done so during your installation
  • Set NIX_PATH to have nixpkgs pointing at the master repo, and local pointing at my nixlocal repository
  • Run nix-build in the source directory to do an in place build, or nix-env -f . -i to install.

Operation

Training

For each believed benign binary, run

generate_db ${target} > ${target}.db

to generate a callgraph, dump constants, cluster the callgraph, and convert the results in a constant database.

Finally, merge all the benign binaries together with

merge-db ${target1}.db ${target2}.db ... > merged.db

Testing

For a potentially tampered with program ${target}, run

test_program ${target} merged.db > out

The resulting output file will contain a list of abberant constants, ranked by weirdness (a constant in a component which matched well with a component in the database, but which did not appear in that component, will be the highest weirdness) with addresses to jump to.

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