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

Static analysis result for SHA-256 172dbf3b32f23476…

MALICIOUS

Office (OOXML) / .XLSX

626.8 KB Created: 2021-10-11 13:45:42 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-09-05
MD5: 4aad93810efd86016bca2dcb7d8a2075 SHA-1: 1be309220c0d391da63fd3e044417136350728fd SHA-256: 172dbf3b32f23476b743ff5e4256db49f0b9a8e49fa8bee6f79efbb49d5b8d01
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Office 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. The document body content appears to be a list of locations and phone numbers, likely a lure, but does not directly indicate the payload's function.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/ETXHh.xm1tV 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
d2ebee6a9997e58a086911372598f6c4c074a9d174cce506590bdb10adaa14a2		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/ETXHh.xm1tV 886784 bytes
ooxml_oleobject_00_ole10native_00.bin
40d01785dd1bd0d8eb4108765903ebf3953953012d47507aa3f9b7f41337ddbd		 ole-package OOXML xl/embeddings/ETXHh.xm1tV Ole10Native stream: OLe10NatiVe 877130 bytes

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