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

Static analysis result for SHA-256 4a91e362f81ce4c5…

MALICIOUS

Office (OOXML) / .XLSX

711.5 KB Created: 2022-08-10 18:51:50 UTC Authoring application: Microsoft Excel 16.0300
MD5: c439154e1c91ec3d9ee7bd39407aa812 SHA-1: 95d2e65084df4227d82c148e0fa6b932b9865ec1 SHA-256: 4a91e362f81ce4c508dd733d526de1beef4c5380f2610041ad7055ed2d580b4a
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The file is an Excel document containing an embedded OLE object. The high-severity heuristic 'OLE_EQUATION_EDITOR' specifically identifies this object as an Equation Editor, a common vector for exploiting vulnerabilities. The document body appears to be tabular data, likely a lure to encourage opening and interaction with the malicious embedded object. No scripts were extracted, and no direct IOCs like URLs or hashes were found.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/xhGgq.U8KPMHo 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
89900982b14f0381830ef4b5bd1d73cbeb81e786c43c804e6528ebabea99a399		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/xhGgq.U8KPMHo 1046016 bytes
ooxml_oleobject_00_ole10native_00.bin
999bfd4e9275af5310e4db1fe629acfd6b6116bf0708b1560e47d7710db2200a		 ole-package OOXML xl/embeddings/xhGgq.U8KPMHo Ole10Native stream: OLe10naTiVe 1035623 bytes

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