Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 7158f5550f23cfdf…

MALICIOUS

Office (OOXML)

74.8 KB Created: 2020-08-07 11:17:10 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2020-09-07
MD5: 1e0a8140f7d168127996bfce87e6323e SHA-1: 85876ba22f7bacc35f484533f2209e0e990657de SHA-256: 7158f5550f23cfdf560dba5a18cf207adb59d25e7949f74eff48f9d2e5ac983d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an OOXML file containing an embedded OLE object identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities, such as CVE-2017-11882, to achieve arbitrary code execution on the victim's machine. No scripts or document body text were extracted, limiting further analysis of the specific payload.

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.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Suspicious extracted artifact info 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 72192 bytes
SHA-256: 4554476154957cf9c760bde1b977a6d744ae8f6a614dbf4db5cf0e24c3f2d40e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.92, consistent with packed or encrypted content.

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