Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 8e0f5d00ef088f66…

MALICIOUS

Office (OOXML)

9.5 KB Created: 2018-09-23 21:02:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-02-10
MD5: 2d79b604bcff5230306ed4d30cba97c1 SHA-1: 9fe70202e65408d8d723381d5b1841bac823f61a SHA-256: 8e0f5d00ef088f662c857c0a1391254c953fad799b06c336804f954838f4cc13
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: 720934438b03209f9f811b94d77353ed28dff2bf163f6335de0cac9fcb6a761c
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: unlikely

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