T1218.001 Compiled HTML File
sub-techniqueEnterpriseAdversaries may abuse Compiled HTML files (.chm) to conceal malicious code. CHM files are commonly distributed as part of the Microsoft HTML Help system. CHM files are compressed compilations of various content such as HTML documents, images, and scripting/web related programming languages such VBA, JScript, Java, and ActiveX. CHM content is displayed using underlying components of the Internet Explorer browser loaded by the HTML Help executable program (hh.exe). A custom CHM file containing embedded payloads could be delivered to a victim then triggered by User Execution. CHM execution may also bypass application application control on older and/or unpatched systems that do not account for execution of binaries through hh.exe.
platforms
Platforms this applies to.
tactics
ATT&CK tactics this technique serves.
sub-technique of
The broader entity this sits under.
mitigations
ATT&CK mitigations that reduce this.
detected by (4)
Data components that detect this.
countered by (D3FEND)
D3FEND countermeasures that counter this.
Detect
NIST CSF 2.0 — areas of relevance (Protect / Detect)
NIST CSF 2.0 areas this most relates to (evidence-ranked).
- PR.DSData Securitystrong · backed by 5 of 10 mapped controls
- PR.PSPlatform Securitystrong · backed by 5 of 10 mapped controls
- DE.CMContinuous Monitoringmoderate · backed by 4 of 10 mapped controls
Derived from MITRE CTID (Apache-2.0) and the NIST 800-53 ↔ CSF crosswalk (public domain). Indicative relevance along the Protect/Detect axis — not a compliance assessment or coverage claim.
mitigating controls (10)
Security controls that mitigate this.
attack patterns (1)
CAPEC attack patterns that exploit this.
groups (5)
Threat groups associated with this.
software (1)
Malware and tools associated with this.
Detected by (Sigma) (6)
Sigma detection rules related to this.
source
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