Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 312a112a26ecff24…

MALICIOUS

Office (OOXML)

78.5 KB First seen: 2019-08-04
MD5: 044e793c62d8710bd8d38e3c1b76a6bb SHA-1: 3bd1dd02460945f596439b2e97d431c31f6486c5 SHA-256: 312a112a26ecff24e5b339ccb5bd9055f3f6b749da9be87220724965cd7de769
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded OLE object identified as a Microsoft Equation Editor object. Heuristics indicate this object is anomalous and exploits CVE-2018-0798, a known vulnerability in Equation Editor that allows for arbitrary code execution. The embedded object is likely a payload designed to exploit this vulnerability.

Heuristics 4

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.theatlantic.com/health/archive/2014/05/how-to-scramble.../361637/ In document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
SHA-256: 8f2423ee5190efa9373e87657d683b94343cdb59801cf92b77dbbe1034d9a972
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: ole10nATive 1605 bytes
SHA-256: daa0f3164a3a486df4c58388039571783139303dc16208a214758dfaa40e8be0

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