Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 4b1607a054c0870d…

MALICIOUS

Office (OOXML)

78.5 KB First seen: 2019-05-16
MD5: bd4be43a131ed12ede044a14adef272f SHA-1: 3cbd53bddc8d0b47b1913763ae7c5fed50790063 SHA-256: 4b1607a054c0870d251011892489686384fc85fc66a653a0b1071fe4b130647a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a malicious OOXML document containing an embedded OLE object. High-severity heuristics indicate the object is an Equation Editor exploit, specifically targeting CVE-2018-0798. This vulnerability allows for the execution of arbitrary code when the document is opened.

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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