CAPEC-655
Avoid Security Tool Identification by Adding Data
An adversary adds data to a file to increase the file size beyond what security tools are capable of handling in an attempt to mask their actions.
In addition to this, adding data to a file also changes the file's hash, frustrating security tools that look for known bad files by their hash.
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Explain the attack pattern CAPEC-655: Avoid Security Tool Identification by Adding Data: how it unfolds, what it needs and how to prevent and detect it in my systems. Use https://capec.mitre.org/data/definitions/655.html and https://cve.bz/cve/capec/655?via=ask-ai-copy, which lists recent CVEs with the weaknesses it exploits. Cite the sources.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this attack pattern's id and public links.
Consequences
| Impact | Affects | Note |
|---|---|---|
| Hide Activities, Bypass Protection Mechanism | Accountability | |
| Modify Data | Integrity |
Related attack patterns
- Part of
- CAPEC-572 Artificially Inflate File Sizes
Examples
Adding data to change the checksum of a file and can be used to avoid hash-based denylists and static anti-vi…
Adding data to change the checksum of a file and can be used to avoid hash-based denylists and static anti-virus signatures.
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