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

Static analysis result for SHA-256 fc3abaedd390a096…

MALICIOUS

Office (OOXML) / .XLSX

641.6 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-10-03
MD5: 003ec7cf3274b6fb4df159bb82c9272d SHA-1: 48b84d3f788d4f2bea7e6372209631e87f0c79d5 SHA-256: fc3abaedd390a09669bbda0d333a7a2a1f2e9087bf293f44e25f879b2add32f7
60 Risk Score

Malware Insights

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

The sample contains an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to execute arbitrary code. The document body appears to be a business invoice, likely a lure to entice the user to open and interact with the malicious content.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/kQRjVCG.uvPpb 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
bff1aeb619071dbc2ea7c3b8db1eff19cdd1635b530e2a20cafa23c0a7390fc9		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/kQRjVCG.uvPpb 923648 bytes
ooxml_oleobject_00_ole10native_00.bin
2e42de48798aafe3b594b1b109436aa321e8aa9cafae30b873a8c88b80f0a759		 ole-package OOXML xl/embeddings/kQRjVCG.uvPpb Ole10Native stream: OLe10nATIve 913882 bytes

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