Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 380351f95f95c685…

MALICIOUS

Office (OOXML)

9.8 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2018-11-13
MD5: 40620c3761922725d7d0e2a28f989b7f SHA-1: f3f9d7ea2e604bd12bb7afcd4ad3ceb261cbb07d SHA-256: 380351f95f95c685aba6718646c5e07d8486fb4dbb0f20cc3a0f00cf72ee2e80
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. Heuristics and ClamAV detection confirm this is a known exploit for CVE-2017-11882, which allows for arbitrary code execution. The document body contains minimal text, suggesting the primary function is the exploit rather than social engineering.

Heuristics 3

  • 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

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: b936d0a944eb6b549f7ceddecf009fd5ab88ec27963a655c971bbf0851dd57f6
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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