1. A method comprising: embedding, with a first computing system, an identifier of a first signature of a first guarantor into a first executable file, the signature of the first guarantor comprising at least one biometric record; posting the first executable file; determining that the first executable file is a malicious executable file; flagging the first signature; generating a second signature of a second guarantor associated with a second executable file; and matching a record of the second signature to a record of the first signature.