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

Static analysis result for SHA-256 43c36d7bc237bc54…

MALICIOUS

Office (OOXML) / .XLSX

719.6 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 18a0000fde4348fba4d0093839d8a44e SHA-1: beaa34533a4b828ee0e039b71eafde4aa943a45f SHA-256: 43c36d7bc237bc548c2ab3f911ef2db7120932b054b96fa4f57bb831e424709b
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The primary finding is a high-severity heuristic indicating an Equation Editor OLE object embedded within the XLSX file. This is a common technique used to deliver exploits, often targeting vulnerabilities in the Equation Editor itself. The embedded OLE object is the most significant indicator of malicious intent.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/7yV3grG.5OosRVC contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • 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
96cdbec937b5698b2cc3a97c5acafbaeecb5564181ce7103c551dc615cb5a9ca		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/7yV3grG.5OosRVC 1009152 bytes
ooxml_oleobject_00_ole10native_00.bin
21d395c785017117ca2272a0e0ac5cdfe67f0f74bbcb288301b9356197356bd6		 ole-package OOXML xl/embeddings/7yV3grG.5OosRVC Ole10Native stream: OlE10NATivE 998912 bytes

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