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Techniques›Initial Access›WASM Smuggling

Initial Access

WASM Smuggling

T1027.006 · MITRE ATT&CK

A WebAssembly-backed HTML-smuggling variant that reconstructs or exposes an embedded payload for browser download. The documented implementations differ: JUMPSEC's W.A.L.K. produces a standalone index.html, while SilkWasm produces a WebAssembly module and HTML example that use a matching Go or TinyGo runtime file. A scoped Internet-delivery variant can use an Internet-reachable controlled link or an approved email/messaging attachment; a recipient must open the lure and may need to click or save. Reconstruction or download does not establish payload execution, an internal foothold, or command and control.

ArtifactsRESTRICTED_ACCESS_BLUR_MARKER

Steps1

CategoryHTML Smuggling

SourceExternal

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Walkthrough

Step 1

RESTRICTED_ACCESS_BLUR_MARKER

RESTRICTED_ACCESS_BLUR_MARKER

Requirements: none specified (operational prerequisites may still apply)

Check before starting: RESTRICTED_ACCESS_BLUR_MARKER

Variant:

Full outcome coverage

Gophish · Start Gophish Services

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powershell

RESTRICTED_ACCESS_BLUR_MARKER

Version: RESTRICTED_ACCESS_BLUR_MARKER. Requirements: ALL(RESTRICTED_ACCESS_BLUR_MARKER)Documents all requested outcomes. This is a candidate, not proof of execution or compatibility.Shell: RESTRICTED_ACCESS_BLUR_MARKER. Privileges: not documented.preconditions: RESTRICTED_ACCESS_BLUR_MARKERdependencies: RESTRICTED_ACCESS_BLUR_MARKERverification: RESTRICTED_ACCESS_BLUR_MARKERfailure modes: RESTRICTED_ACCESS_BLUR_MARKERlimitations: RESTRICTED_ACCESS_BLUR_MARKER

RESTRICTED_ACCESS_BLUR_MARKER

Detection signal

Detection 01

RESTRICTED_ACCESS_BLUR_MARKER

Mitigations

Mitigation 01

RESTRICTED_ACCESS_BLUR_MARKER

OPSEC notes

RESTRICTED_ACCESS_BLUR_MARKER

References

Extended details

RESTRICTED_ACCESS_BLUR_MARKER