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

Static analysis result for SHA-256 4b55481443cfa1de…

MALICIOUS

Office (OOXML) / .XLSX

715.6 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: c822992107ba623551e0c990c2c5df19 SHA-1: b3ddd6ccafc2c41e26f0ff5ea7c1396457a65c70 SHA-256: 4b55481443cfa1dec6972320d4b1c7539a4a10f5966695452f75ee4499eb89cc
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an OOXML XLSX document containing 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 achieve arbitrary code execution. No further IOCs were extracted from the static analysis.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/pk4oamOtb.KiT 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
c96becd7005a5afda1d591b465b1bc8161b541dea26de3d8b0470130f650da83		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/pk4oamOtb.KiT 996864 bytes
ooxml_oleobject_00_ole10native_00.bin
87ecb54132e57c1902bbfb19d020d421dc0b15b23bc9b64ec7ce53b06804b2cb		 ole-package OOXML xl/embeddings/pk4oamOtb.KiT Ole10Native stream: oLe10NAtIve 986349 bytes

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