American Fuzzy Lop plus plus 4.04c
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Google’s American Fuzzy Lop is a brute-force fuzzer coupled with an exceedingly simple but rock-solid instrumentation-guided genetic algorithm. afl++ is a superior fork to Google’s afl. It has more speed, more and better mutations, more and better instrumentation, custom module support, etc.
https://packetstormsecurity.com/files/168680/AFLplusplus-4.04c.tar.gz