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

Static analysis result for SHA-256 1f69523539d6ee4e…

MALICIOUS

Office (OOXML) / .XLSX

584.5 KB Created: 2021-09-22 12:07:42 UTC Authoring application: Microsoft Excel 12.0000
MD5: ea77437ba5ebeef2b2c9f6454afaa1b5 SHA-1: 845f927e2f4944d97005cb54ed27d30edd6e87bc SHA-256: 1f69523539d6ee4e730e8f38baf908e2bcf6fd730560f9fabfadc1e4221dea72
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The high-severity heuristic firing for 'OLE_EQUATION_EDITOR' indicates the presence of a vulnerable Equation Editor OLE object within the XLSX file. This is a common technique used to exploit CVE-2017-11882, leading to the execution of arbitrary code. The embedded OLE object is the primary indicator of compromise.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/LiB.shlUIpW 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
85936671b2410496be88daf01c1d676dbd7a4e1e3dfda86d4e2c89e33eb9661b		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/LiB.shlUIpW 876544 bytes
ooxml_oleobject_00_ole10native_00.bin
a98dbe7535caa80756f59d2b5879baad9744d44c30691b0beabd8a1f64a0276b		 ole-package OOXML xl/embeddings/LiB.shlUIpW Ole10Native stream: olE10NatIVe 866910 bytes

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