Adversaries may attempt to mimic features of valid code signatures to increase the chance of deceiving a user, analyst, or tool. Code signing provides a level of authenticity on a binary from the developer and a guarantee that the binary has not been tampered with. Adversaries can copy the metadata and signature information from a signed program, then use it as a template for an unsigned program. Files with invalid code signatures will fail digital signature validation checks, but they may appear more legitimate to users and security tools may improperly handle these files.(Citation: Threatexpress MetaTwin 2017)
Unlike Code Signing, this activity will not result in a valid signature.
View in MITRE ATT&CK®| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| binary_authorization | Binary Authorization | technique_scores | T1036.001 | Invalid Code Signature |
Comments
Each image has a signer digitally sign using a private key. At deploy time, the enforcer uses the attester's public key to verify the signature in the attestation.
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