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

Static analysis result for SHA-256 3b941122fc0b35e3…

MALICIOUS

Office (OOXML) / .XLSX

714.3 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 39909fd275612f520097c875347b7bb9 SHA-1: 4f0e5123e7943be0f7c8653813d11659f7137a4c SHA-256: 3b941122fc0b35e3dfff12d11bd75f0f6188365edfd146e2e3025cf2ee5b377c
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor. This is a high-severity finding, indicating a likely attempt to exploit a vulnerability within the Equation Editor component to execute arbitrary code. The embedded object is a known technique for delivering secondary payloads.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/W4QUKTxs.vtTf1 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
11ab4586097d290567eb46b654a49d8c5aeec7c167c74eff363e273c8c4e5d6c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/W4QUKTxs.vtTf1 993280 bytes
ooxml_oleobject_00_ole10native_00.bin
78a9f9cf7415bc6ae5a5fc929d8fd8beea2112fab23319020178f2f11b5e7c7f		 ole-package OOXML xl/embeddings/W4QUKTxs.vtTf1 Ole10Native stream: olE10nATIVe 982947 bytes

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