Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 dddc108ca6aebe43…

MALICIOUS

Office (OOXML)

10.4 KB Created: 2018-09-21 05:26:51 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2019-08-04
MD5: 8088ab27b7c2845497ef5fb53d28fa85 SHA-1: cf6388ada769750b8901bda53678e791d1585f33 SHA-256: dddc108ca6aebe43f6f7cba1f023d576bf89b7b2de92bbfb99c5659ff83770de
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an OOXML file containing an embedded OLE object, specifically an Equation Editor object. High-severity heuristics indicate the presence of CVE-2018-0798, which is an exploit targeting the Equation Editor to achieve arbitrary code execution. The document body contains minimal text, offering no further clues to the specific lure.

Heuristics 3

  • 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

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: 4dafc987bb70bd25675cf5c510f6edad0882e07d12790d7f54705dae6c2c5ef1
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: oLE10natiVE 1630 bytes
SHA-256: 44d7522a14ab866c2791e66c3ad6bf648e6779d203dcf13d00067e1a43db659f

Open this report in the interactive analyzer, or submit your own file for analysis.