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

Static analysis result for SHA-256 c198f34807e27d31…

MALICIOUS

Office (OOXML) / .XLSX

592.3 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: f8faa8faa06b2f7572e9f551256f0613 SHA-1: 1cf1ba3ba30ca5eb0190fdaf30f6a48eccd9092f SHA-256: c198f34807e27d3177c2016c312867575923b036ea169349b6b9a94024d63274
60 Risk Score

Malware Insights

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

The file contains an embedded OLE object, specifically identified as an Equation Editor object. This is a known vector for exploiting vulnerabilities like CVE-2017-11882, which allows for arbitrary code execution. The embedded object likely serves as the initial stage for delivering a secondary malicious payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/MeekAu8.4DOiC 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
721a5762515f06d552e594fd83772e4542dbb38f0a23f3605fe07ef9ae5240cb		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/MeekAu8.4DOiC 890368 bytes
ooxml_oleobject_00_ole10native_00.bin
0c88a198945dabe1fa38bf990ad4ac06ac7611757c7e6e124de8f737a5393b3a		 ole-package OOXML xl/embeddings/MeekAu8.4DOiC Ole10Native stream: oLE10NATiVe 881073 bytes

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