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

Static analysis result for SHA-256 26c1caa943c283b9…

MALICIOUS

Office (OOXML) / .XLSX

582.2 KB Created: 2023-09-05 23:17:35 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-09-06
MD5: 78f39f860bb17b6f89745451278ec89c SHA-1: cecb90ac8cf33f8602da6cd9150db68ba7b9e290 SHA-256: 26c1caa943c283b967b361ca76fd7dfd3783c2439f423e7dce25b2850f3a77df
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The high-severity heuristic firing for an Equation Editor OLE object indicates the likely presence of a malicious embedded component. This technique is commonly used to exploit vulnerabilities or deliver secondary payloads. No document body or scripts were extracted, limiting further analysis of the specific payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/A7Xqv.n5Q 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
76546570b2ab596941c873ac50302dba47073f492be45fe77f44f596bb9b9683		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/A7Xqv.n5Q 794112 bytes
ooxml_oleobject_00_ole10native_00.bin
14b5fd41373622f41f7648ee15b34a64a79e0a376372a960f9ece3bf14e7f8b5		 ole-package OOXML xl/embeddings/A7Xqv.n5Q Ole10Native stream: OlE10NaTIVe 785384 bytes

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