afl-multicore is a set of tools that makes it easy to manage multiple instances of AFL on a single machine
afl-multicore was built to be a drop-in replacement for the afl-fuzz command. If you take a standard afl command such as afl-fuzz -i ~/fuzz_in -o ~/fuzz_out -- /my/binary, and replace afl-fuzz with afl-multicore, it will spin up one instance for each CPU on your machine.
Running afl-multikill kills these instances.
afl-multicore has additional options that allow you to name your fuzzing session and decide how many instances are created. You can learn more by running afl-multicore --help:
--- Cut off standard AFL options from output
Multicore settings:
-session name - prefix for all fuzz workers' name (fuzzer)
-workers n - number of workers to spin up (# CPUs)
-nocheck - don't check if binary works before spinning up
afl-multikill can stop sessions spawned by afl-multicore.
If you named your session, you can kill it by running afl-multikill -session <session-name>
afl-multikill --help:
afl-multikill [options]
Options:
-session name - the session to kill (fuzzer)
afl-multistats gathers and aggregates stats from an AFL sync directory, and presents them either in a human-readable format, or in JSON. It also includes a HUD mode which is similar to AFL's retro-style UI.
afl-multistats --help:
afl-multistats [options] /path/to/sync/dir
Options:
-format fmt - the format to output stats in (json)
-advanced - output all stats, not just summary
-hud - display a persistent stats HUD