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

Static analysis result for SHA-256 93b882c8cf900bb9…

MALICIOUS

Office (OOXML) / .XLSX

12.2 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300
MD5: 934ca46fbd2ecff5f10ebfa820c5cf3b SHA-1: 8a648be566253a0279420bdfc1cbb1422e1c6351 SHA-256: 93b882c8cf900bb947976f451b0050b2750f66790016a4409ea0d800fde9a7fa
100 Risk Score

Malware Insights

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

The file is an Office document containing an embedded OLE object, specifically identified as a vulnerable Equation Editor component. Heuristics indicate a high likelihood of exploitation for CVE-2018-0798. This suggests the document is designed to exploit this vulnerability to execute arbitrary code, likely leading to the download and execution of a second-stage payload.

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
b14b4177ba9c433905561cd39938d35ba0169ec07a5b49cdc9731eb4f31e3994		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 3584 bytes
ooxml_oleobject_00_ole10native_00.bin
b2034fe66f0882e6d0bc44447c3e8246511b6dd7bcf2b0f0d0661546d610d44c		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: ole10NATivE 1527 bytes

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