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

Static analysis result for SHA-256 ddeef538c352d1de…

MALICIOUS

Office (OOXML) / .XLSX

1.97 MB Created: 2025-04-16 03:58:07 UTC Authoring application: Microsoft Excel 12.0000
MD5: b5d540c14b066b8b23d691aa566480ba SHA-1: 5251fd9b46ba2514d3d63ab28dafb193043d1c6f SHA-256: ddeef538c352d1de5bfbe30045f04676333c1386b2bb53977c34fad99f990442
80 Risk Score

Malware Insights

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

The sample is an OOXML file that contains an embedded OLE object, specifically identified as an Equation Editor object. The document body contains a lure instructing the user to 'enable editing' to view financial statement information, a common tactic to bypass macro security. The presence of the Equation Editor OLE object suggests an attempt to exploit a known vulnerability, likely CVE-2017-11882, to execute malicious code.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/TlDgkJq.OPb 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
10af284c3cae284e1aaa16d4816c391247abc136dbaf52541a84b95b0acfcebc		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/TlDgkJq.OPb 2779136 bytes

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