Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 1fa47a9d78be0ca9…

MALICIOUS

Office (OOXML)

17.2 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-03-10
MD5: 6ab82ccf7ff1cc1e4ae42a2c500d2b37 SHA-1: b682bfebf4d3d2a51585ca82fa6b1d0697987954 SHA-256: 1fa47a9d78be0ca99db3fa795dba68161b161af1356f9d66b4f9e957032a1da8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file contains an embedded Equation Editor OLE object, which is a known exploit for CVE-2017-11882. This vulnerability allows for arbitrary code execution when the document is opened. The document also contains a lure to enable editing, which is a common tactic for macro-based malware.

Heuristics 4

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
SHA-256: 4849758e831befc38f7186c711e50332af56f75183a43c2da9ea185619c5767c
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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