Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c6f3970026b760a1…

MALICIOUS

Office (OOXML)

9.3 KB Created: 2018-09-23 21:02:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-12-10
MD5: 95aed8b8cc09ed84cbdb2036441a326a SHA-1: 75c09fac6a9915df6a5e54b68e1046adef36f340 SHA-256: c6f3970026b760a155af4e9aedf34c12a3fc9a39a9b6bd9680f65b02058bb36d
180 Risk Score

Malware Insights

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

The sample is an OOXML file containing an embedded OLE object, specifically identified as a Microsoft Equation Editor exploit. ClamAV detections confirm this, flagging it as Doc.Exploit.CVE_2017_11882-6934206-0. This exploit targets CVE-2017-11882, which allows for arbitrary code execution when the embedded object is activated. The document body text is generic and does not provide further clues about the attack's specific lure.

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: 1bcf6a59f388c6bdc3fee1f59f64a4e8b501fd19c51faa0851f7b913c9938d3b
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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