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

Static analysis result for SHA-256 da83daf1d0390ec8…

MALICIOUS

Office (OOXML) / .XLSX

672.5 KB Created: 2023-11-17 18:26:59 UTC Authoring application: Microsoft Excel 12.0000
MD5: 82c78a205701f8d42446379a91fac0c2 SHA-1: d1d0f77c63f5573bf6fb3709a3507ff5a37e52d0 SHA-256: da83daf1d0390ec8def3ed2986295a775dda17012fcc51ffb690d12f215ba358
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The high-severity heuristic 'OLE_EQUATION_EDITOR' indicates the presence of a malicious Equation Editor OLE object within the XLSX file. This object, identified by the path 'xl/embeddings/xkR.d2lmM75', is a known vector for exploiting vulnerabilities to execute arbitrary code. The embedded OLE object is the primary indicator of malicious intent, likely serving as a dropper for further stages.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/xkR.d2lmM75 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
4ae394ba4976e4d65968b6819cfb51c737571dc401d15c745a35e47e42b751a3		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/xkR.d2lmM75 990208 bytes
ooxml_oleobject_00_ole10native_00.bin
54752045d1b4d150dc26bcb41c80441aac40abcb6b45841f81c48c9e5c2ea6c7		 ole-package OOXML xl/embeddings/xkR.d2lmM75 Ole10Native stream: ole10natiVE 979684 bytes

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