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

Static analysis result for SHA-256 417d38f0078a18cb…

MALICIOUS

Office (OOXML) / .XLSX

627.7 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-08-22
MD5: 0b627e92f3cf551dceb23f4dce3e6177 SHA-1: 27de2dd94b4f341cb7818fd383b05256a2cdc0eb SHA-256: 417d38f0078a18cb32f4c47f31d73b9270c7f143ce3813be5d4fec3367792962
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1559 Component Object Model Hijacking

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor exploit. This exploit likely leverages a known vulnerability in the Equation Editor component to execute arbitrary code. The document body, formatted as an invoice, serves as a lure to trick users into opening the malicious content.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/fAvIt.SRY 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
19b93589532a900cfe60ea20965aeb8073b1a13747e9e1b85e70240fb6edc826		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/fAvIt.SRY 895488 bytes
ooxml_oleobject_00_ole10native_00.bin
2e3b7c06e68faf1691ae4cc77c68710862454c03a05649de4bc1f706b53e1032		 ole-package OOXML xl/embeddings/fAvIt.SRY Ole10Native stream: oLE10NaTIVe 885811 bytes

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