15. A non-transitory computer-readable-storage medium comprising one or more computer-executable instructions that, when executed by at least one processor of a computing device, cause the computing device to: determine that a text message comprises a confirmation code for an out-of-band authentication procedure based on at least one of: a format of the text message; a source of text message; detect an attempt to access the text message; determine that the attempt to access the text message was configured to avoid participation by a user of a device on which the attempt to access the text message occurred; perform, in response to determining both that the attempt to access the text message was configured to avoid participation by the user and that the text message comprises the confirmation code for the out-of-band authentication procedure, a remediation action that addresses an illegitimate out-of-band authentication attempt, the illegitimate out-of-band authentication attempt comprising the attempt to access the text message, wherein the remediation action comprises at least one of: blocking the attempt to access the text message; warning a user of the attempt; warning a sender of the text message of the attempt; disabling an application with a permission to access text messages.
15. A non-transitory computer-readable-storage medium comprising one or more computer-executable instructions that, when executed by at least one processor of a computing device, cause the computing device to: determine that a text message comprises a confirmation code for an out-of-band authentication procedure based on at least one of: a format of the text message; a source of text message; detect an attempt to access the text message; determine that the attempt to access the text message was configured to avoid participation by a user of a device on which the attempt to access the text message occurred; perform, in response to determining both that the attempt to access the text message was configured to avoid participation by the user and that the text message comprises the confirmation code for the out-of-band authentication procedure, a remediation action that addresses an illegitimate out-of-band authentication attempt, the illegitimate out-of-band authentication attempt comprising the attempt to access the text message, wherein the remediation action comprises at least one of: blocking the attempt to access the text message; warning a user of the attempt; warning a sender of the text message of the attempt; disabling an application with a permission to access text messages. 17. The computer-readable-storage medium of claim 15 , wherein: the attempt to access the text message comprises an attempt to forward the text message; determining that the attempt to access the text message was configured to avoid participation by the user comprises determining that the attempt to forward the text message happened within a suspiciously short amount of time according to a predefined suspicion heuristic.