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

Static analysis result for SHA-256 a5f08e2240cabf7e…

MALICIOUS

Office (OOXML) / .XLSX

694.5 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: fcf10c62515cd12e1209bf6c011dbbe2 SHA-1: 6b1b7b04f224fafb1087e436fa11d166908ecc85 SHA-256: a5f08e2240cabf7e7f232e0c422d0ce90b8aab26bd52d9cbccf161b647414299
60 Risk Score

Malware Insights

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

The high-severity heuristic firing for an Equation Editor OLE object strongly suggests the file is designed to exploit a vulnerability within this component. This is a common technique for delivering malicious payloads. No scripts or document body text were extracted, limiting further analysis of the specific exploit or payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/2B.OoBwz 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
0eea78c15f3092ee23ef6de8634822d596cff4e3af84d287a863ce59fb730d6a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/2B.OoBwz 944128 bytes
ooxml_oleobject_00_ole10native_00.bin
12969a91981bb71ef0303f8d8706aafa7ec17f6cc725e1c507754db306f5d8af		 ole-package OOXML xl/embeddings/2B.OoBwz Ole10Native stream: OLe10NAtiVe 934391 bytes

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