Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 953a6306d8a67dd4…

MALICIOUS

Office (OOXML) / .XLSX

137.2 KB Created: 2020-07-07 21:52:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9febf3fe31dc5704361e221d53a75c03 SHA-1: a833fd9e821506ad7cd05cacb4242100e86748ec SHA-256: 953a6306d8a67dd42a51ea07f5e77ec77888052ae02e6bf385305d5c10397a59
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The sample is an Office Open XML spreadsheet containing an embedded OLE object, specifically an Equation Editor object. High-severity heuristics indicate the exploitation of CVE-2018-0798 due to anomalous native stream data within the Equation Editor object. This suggests the file is designed to exploit this vulnerability to execute arbitrary code.

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
e25496bb75fcf8978403d3f5760813fa0e1b576388bb3897257eff75aab3555d		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4608 bytes
ooxml_oleobject_00_ole10native_00.bin
9822981022b8c71112ddadd0d72669e9466f381381f0413b4f5aa9002b1d3b78		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: olE10NATive 2182 bytes

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