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

Static analysis result for SHA-256 bc806f70854a98e2…

MALICIOUS

Office (OOXML) / .XLSX

618.7 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1a4b00023fb4bd778ca26f3e6f350104 SHA-1: 7bd5687a1766f845b050c87e4f4128d327d8007f SHA-256: bc806f70854a98e24d62828e422dc927780f48b490a22fe957e59cc308271cf5
60 Risk Score

Malware Insights

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

The file is an Excel document containing an embedded OLE object, specifically identified as a Equation Editor object. This indicates the sample likely exploits a known vulnerability within the Equation Editor component to execute arbitrary code. The SHA256 hash is included as a primary indicator of compromise.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/1lTgSgKZj.CuAv 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
e62ebb8406f9d71cb8685ec6d78659b104d6e0979ac108b028b674ca38187535		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/1lTgSgKZj.CuAv 865280 bytes
ooxml_oleobject_00_ole10native_00.bin
6d358163abfde56f500186181766ea4b5515a4f3061178455786156cc05476e6		 ole-package OOXML xl/embeddings/1lTgSgKZj.CuAv Ole10Native stream: OlE10natiVE 855856 bytes

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