Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 a8412b4eb567fa68…

MALICIOUS

Office (OOXML)

9.8 KB Created: 2018-09-23 21:02:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2019-03-18
MD5: 08daa6eb09cd70ac3d08923dd73d55a9 SHA-1: 1c08942151d0d7cd40fea3ac489dc948cb153b98 SHA-256: a8412b4eb567fa682dff67a3227b9c80a539a6030089d4b6aced6a2e70c62593
200 Risk Score

Malware Insights

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

The sample is an Office document 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 indicates the file is designed to exploit the CVE-2017-11882 vulnerability for client-side code execution, likely delivered as a spearphishing attachment.

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
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

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 4608 bytes
SHA-256: 9ef65a84f355dabba0b37586f0bb78a2a998a45525c2e216bec53240f52956ef
Detection
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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