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

Static analysis result for SHA-256 cf00515f4589e5b0…

MALICIOUS

Office (OOXML) / .XLSX

632.9 KB Created: 2022-08-10 18:51:50 UTC Authoring application: Microsoft Excel 16.0300
MD5: 46ec7d0705f2642e0ddeb6633de37124 SHA-1: 275467733228e6b77896aca75eb2fb01edc1ecc7 SHA-256: cf00515f4589e5b0c19f2c3214db7dfcbf7a94b6eddfa8b83d9b419613e45e50
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is an Excel document containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. This is a known vector for exploiting vulnerabilities, such as CVE-2017-11882, to achieve arbitrary code execution. The embedded object's filename, 'ig2z0R9h.uE', is suspicious. The document body appears to be financial or order-related data, which could serve as a lure for a targeted attack.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/ig2z0R9h.uE 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
b59da5845070e9070b647c8ae668f26e4984670be4fcd1b89104c3a30747da93		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/ig2z0R9h.uE 865280 bytes
ooxml_oleobject_00_ole10native_00.bin
b29a002f7ad1b65d15c9dec0cd671d59d28f802257f93823b6f7bffda791fb16		 ole-package OOXML xl/embeddings/ig2z0R9h.uE Ole10Native stream: oLE10naTIVE 855995 bytes

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