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

Static analysis result for SHA-256 335438459ec730e3…

MALICIOUS

Office (OOXML) / .XLSX

1.96 MB Created: 2019-11-27 09:20:57 UTC Authoring application: Microsoft Excel 12.0000
MD5: b05a2374e1c963e097f94294a1851603 SHA-1: e4a1a871bd5e47532587c4d82dbf4be99bca38c5 SHA-256: 335438459ec730e30e3ea9654ff93e36a286cff5c6b304ea046f7f52557f9292
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. The document body contains a lure instructing the user to 'enable editing' to bypass macro security, a common technique for malware droppers. The presence of the embedded OLE object suggests it is intended to be executed, likely leading to a secondary payload or exploit.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/GKyDva.Tp6l2JT 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
ae8f1fee0ab77ea5d9e4687da70a6e11592b8cc2d14b2fc736ebf02be2726d34		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/GKyDva.Tp6l2JT 2752512 bytes
ooxml_oleobject_00_ole10native_00.bin
dc44b2b0d2c90561b91e5e48584689849c89246f29476892ab7cf520a1ce3606		 ole-package OOXML xl/embeddings/GKyDva.Tp6l2JT Ole10Native stream: OlE10nAtIVE 2728662 bytes

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