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

Static analysis result for SHA-256 45d86a49a0f6fd9f…

MALICIOUS

Office (OOXML) / .XLSX

690.8 KB Created: 2020-01-08 16:45:10 UTC Authoring application: Microsoft Excel 12.0000
MD5: 3f786afb46eb613a38967efdae6a0bf0 SHA-1: 8ba51a54689993a7c7f39c62dfd15de9938172c3 SHA-256: 45d86a49a0f6fd9f5d1714e9fe9fd3985ae593ec5bc36b74ca1d93ed275c57e9
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel document containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests an attempt to exploit a known vulnerability, such as CVE-2017-11882, which is commonly delivered via this method. The document body contains what appears to be a purchase order, a common lure for malicious documents.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/S5m.DYSF 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
216f3d5e214e072ffe54b715946df2f7f3a7a8826c55ec8815008c79456220a0		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/S5m.DYSF 954880 bytes
ooxml_oleobject_00_ole10native_00.bin
def6eb9587f5c7e5a6f74d3855c79ab954a0a7a0036e324a5e6cdae6d6b6eb1a		 ole-package OOXML xl/embeddings/S5m.DYSF Ole10Native stream: olE10nATIvE 944853 bytes

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